AU2004201468A1 - Transmitting/receiving terminal apparatus - Google Patents
Transmitting/receiving terminal apparatus Download PDFInfo
- Publication number
- AU2004201468A1 AU2004201468A1 AU2004201468A AU2004201468A AU2004201468A1 AU 2004201468 A1 AU2004201468 A1 AU 2004201468A1 AU 2004201468 A AU2004201468 A AU 2004201468A AU 2004201468 A AU2004201468 A AU 2004201468A AU 2004201468 A1 AU2004201468 A1 AU 2004201468A1
- Authority
- AU
- Australia
- Prior art keywords
- transmitting
- signal
- terminal apparatus
- receiving terminal
- way
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32715—Workpiece holder
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/50—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges
- C23C16/505—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges using radio frequency discharges
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/321—Radio frequency generated discharge the radio frequency energy being inductively coupled to the plasma
- H01J37/3211—Antennas, e.g. particular shapes of coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/32174—Circuits specially adapted for controlling the RF discharge
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/3244—Gas supply means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32623—Mechanical discharge control means
- H01J37/32651—Shields, e.g. dark space shields, Faraday shields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32715—Workpiece holder
- H01J37/32724—Temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32733—Means for moving the material to be treated
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
- H05H1/4645—Radiofrequency discharges
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Electromagnetism (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Radio Relay Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Description
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Applicant(s): MITSUBISHI DENKI KABUSHIKI KAISHA Invention Title: TRANSMITTING/RECEIVING TERMINAL APPARATUS The following statement is a full description of this invention, including the best method of performing it known to us: 2 TITLE OF THE INVENTION TRANSMITTING/RECEIVING TERMINAL APPARATUS BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a transmitting/receiving terminal apparatus that can carry out satellite communications while receiving a satellite broadcasting service.
Description of Related Art Ground terminal apparatus used in the field of satellite broadcasting services and satellite communications are classified into receiving terminal apparatus that receive satellite broadcasting services represented by BS broadcasting services and CS broadcasting services, and transmitting/receiving terminal apparatus intended for two-way communications by way of satellites. For example, a receiving terminal apparatus intended for receiving satellite broadcasting services and provided with two or more receiving units in order to simultaneously receive two or more programs and to display them on a screen has been invented, as disclosed in Japanese patent application publication (TOKKAIHEI) No. 7- 75034.
A problem with prior art ground terminal apparatus is that they cannot simultaneously carry out reception of broadcasting services and satellite communications because they have been developed as apparatus designed specifically for reception of broadcasting services or for satellite communications, as mentioned above. Although the receiving terminal apparatus disclosed in Japanese patent application publication (TOKKAIHEI) No. 7-75034 is provided with many receiving units, it aims only at reception of two or more satellite broadcasting services, and does not aim at simultaneously performing satellite communications.
H:\teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 3 SUMMARY OF THE INVENTION The present invention is made in order to solve the above-mentioned problem, and it is therefore an object of the present invention to provide a transmitting/receiving terminal apparatus that can simultaneously carry out satellite communications while receiving satellite broadcasting services.
In accordance with an aspect of the present invention, there is provided a transmitting/receiving terminal apparatus including: a duplexer for separating a signal received via a transmitting/receiving antenna and a signal to be transmitted via the transmitting/receiving antenna from each other; a distributor for distributing a received signal from the duplexer; a broadcast receiving unit for converting the received signal distributed thereto from the distributor into a signal of a lower frequency and performing data decompression on this signal, and for reproducing either an image or a voice; and a two-way-communications unit for converting the received signal distributed thereto from the distributor into a signal of a lower frequency and reproducing a management command from this signal, and for generating a response signal, the transmitting/receiving terminal apparatus transmitting the response signal generated by the two-way-communications unit to the satellite by way of the duplexer and the transmitting/receiving antenna.
Therefore, since the transmitting/receiving terminal apparatus distributes a signal received via the transmitting/receiving antenna received to the broadcast receiving unit and the two-way-communications unit so as to make them process the received signal, respectively, and the two-way-communications unit generates response data and transmits it by way of the duplexer and the transmitting/receiving antenna, the transmitting/receiving terminal apparatus can simultaneously perform reception of broadcasting services and two-way communications.
In accordance with another aspect of the present H.\teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 4 invention, there is provided a transmitting/receiving terminal apparatus comprising: a duplexer for separating a signal received via a transmitting antenna and a signal to be transmitted via a transmitting antenna from each other; a distributor for distributing a received signal from the duplexer; a broadcast receiving unit for converting the received signal distributed thereto from the distributor into a signal of a lower frequency and performing data decompression on this signal, and for reproducing either an image or a voice; and a two-way-communications unit for converting the received signal distributed thereto from the distributor into a signal of a lower frequency and reproducing a management command from this signal, and for generating a response signal, the transmitting/receiving terminal apparatus transmitting the response signal generated by the two-way-communications unit to the satellite by way of the duplexer and the transmitting antenna.
Therefore, since the transmitting/receiving terminal apparatus distributes a signal received via the transmitting/receiving antenna received to the broadcast receiving unit and the two-way-communications unit so as to make them process the received signal, respectively, and the two-way-communications unit generates response data and transmits it by way of the duplexer and the transmitting/receiving antenna, the transmitting/receiving terminal apparatus can simultaneously perform reception of broadcasting services and two-way communications.
In accordance with a further aspect of the present invention, there is provided a transmitting/receiving terminal apparatus including a duplexer for separating a signal received via a transmitting/receiving antenna and a signal to be transmitted via the transmitting/receiving antenna from each other; a distributor for distributing a received signal from the duplexer; a broadcast receiving unit for converting the received signal from the distributor into a signal of a lower frequency and H, \teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 5 performing data decompression on this signal, and for reproducing either an image or a voice; first and second two-way-communications units each for converting the received signal from the distributor into a signal of a lower frequency and reproducing a control signal from this signal, and each for generating a response signal; and a switcher for selecting one of the response signals generated by the first and the second two-waycommunications units, the transmitting/receiving terminal apparatus transmitting the selected response signal by way of the duplexer and the transmitting/receiving antenna.
Therefore, since the transmitting/receiving terminal apparatus supplies a received signal to the two or more two-way-communications units, selects one of the outputs of the two or more two-way-communications units, and transmits the selected output to a satellite, the transmitting/receiving terminal apparatus can simultaneously perform reception of broadcasting services and two or more two-way communications.
Further objects and advantages of the present invention will be apparent from the following description of the preferred embodiments of the invention as illustrated in the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram of a satellite communications system in which a transmitting/receiving terminal apparatus according to embodiment 1 of the present invention is used; Fig. 2 is a schematic diagram of signals which the transmitting/receiving terminal apparatus according to embodiment 1 of the present invention transmits and receives; Fig. 3 is a block diagram showing the structure of the transmitting/receiving terminal apparatus in accordance with embodiment 1 of present invention, and Fig. 4 is a block diagram showing the structure of a H \teresab\keep\Speci\P52688 03110-AU.doc 6/04/04
L
6 transmitting/receiving terminal apparatus in accordance with embodiment 2 of present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1.
A transmitting/receiving terminal apparatus according to embodiment 1 of the present invention will be explained with reference to Figs. 1 to 3. Fig. 1 is a diagram showing the structure of a satellite communications system in which the transmitting/receiving terminal apparatus according to embodiment 1 is used. Fig. 2 is a schematic diagram showing signals which the transmitting/receiving terminal apparatus according to embodiment 1 of the present invention transmits and receives. Fig. 3 is a block diagram showing the structure of the transmitting/receiving terminal apparatus in accordance with embodiment 1. In Fig. 1, reference numeral 1 denotes a gateway station, reference numeral 2 denotes a communication satellite, and reference numeral 3 denotes each transmitting/receiving terminal apparatus according to embodiment 1 of the present invention. While the gateway station 1 makes a broadcast transmission to each transmitting/receiving terminal apparatus 3 via the communication satellite 2 by using a channel Fl, the gateway station 1 and each transmitting/receiving terminal apparatus 3 carry out two-way communications with each other by using a downstream channel F2 and an upstream channel F3. In Fig. 2, reference numeral 4 denotes a packet that is transmitted for broadcasting by way of the channel Fl, reference numeral 5 denotes a management command that is transmitted from the gateway station l, by way of the communication satellite 2, to each transmitting/receiving terminal apparatus 3 by using the downstream channel F2, and reference numeral 6 denotes response data that is transmitted from each transmitting/receiving terminal apparatus 3, by way of the communication satellite 2, to the gateway station 1 by H.\teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 7 using the upstream channel F3.
The gateway station 1 stores music data, image data, etc.,. and performs time-based compression on stored music data and image data by using a compression CODEC so as to generate packets 4 and broadcasts them by using the channel Fl. The gateway station 1 also carries out twoway communications with each transmitting/receiving terminal apparatus 3. Examples of the use of the two-way communications are management of a moving object that carries a transmitting/receiving terminal apparatus, such as a vehicle, and notification of an emergency that occurs in the moving object.
Next, the structure of each transmitting/receiving terminal apparatus according to embodiment 1 will be explained with reference to Fig. 3. In Fig. 3, reference numeral 7 denotes a transmitting/receiving antenna for transmitting and receiving electric waves to and from the communication satellite 2, reference numeral 8 denotes a duplexer for separating a received wave and a wave to be transmitted from each other, reference numeral 9 denotes a low noise amplifier for amplifying the received wave, reference numeral 10 denotes a distributor for distributing the received wave between two destinations, reference numeral 11 is a broadcast receiving unit for receiving a broadcasting electric-wave transmitted to a corresponding transmitting/receiving terminal apparatus via the communication satellite 2, reference numeral 12 denotes a two-way-communications unit for carrying out two-way communications with the gateway station 1 via the communication satellite 2, and reference numeral 13 denotes a high-power amplifier for amplifying a response signal generated by the two-way-communications unit 12.
In the broadcast receiving unit 11, reference numeral 14 denotes a frequency converter for selecting a broadcast channel based on a CH control signal applied thereto, and for converting the received broadcast signal into a signal having an intermediate frequency, reference numeral H \teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 8 denotes a demodulator for performing demodulation processing such as QPSK demodulation, reference numeral 16 denotes an error correction unit, reference numeral 17 denotes a packet extraction circuit for extracting packet data from the received signal for every packet, reference numeral 18 denotes an AV data decompression circuit for decompressing the extracted packet data so as to reproduce voice and image data, reference numeral 19 denotes an output interface for interfacing between an output device, such as a display, and a speaker, and reference numeral denotes a channel control unit for outputting the CH control signal indicating a broadcast channel to be selected to the frequency converter 14. On the other hand, in the two-way-communications unit 12, reference numeral 21 denotes a frequency converter for selecting a two-way-communications channel according to a CH control signal applied thereto, and for converting the received signal to a signal having an intermediate frequency, reference numeral 22 denotes a demodulator for performing demodulation processing such as QPSK demodulation, reference numeral 23 denotes an error correction unit, reference numeral 24 denotes a management data reproduction circuit for reproducing management data from the received signal, reference numeral 25 denotes a control unit for instructing a response data generation circuit to make a response based on the management data, and for outputting the CH control signal indicating a twoway-communications channel to be selected to the frequency converter 21, reference numeral 26 denotes the response data generation circuit for generating response data according to the response instruction from the control unit 25, reference numeral 27 denotes an error correction coding unit for adding an error correction code to the response data, reference numeral 28 denotes a modulator for performing modulation processing such as QPSK modulation, and reference numeral 29 denotes an RF converter for converting the output of the modulator 28 H \teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 9 into an RF signal.
Next, the operation of each transmitting/receiving terminal apparatus according to embodiment 1 of the present invention will be explained. A broadcast signal broadcast from the communication satellite 2 is received by the transmitting/receiving antenna 7. This received signal is inputted to the low noise amplifier 9 via the duplexer 8. The low noise amplifier 9 sends the received signal to the distributor 10 after amplifying the received signal, and the distributor 10 distributes the received and amplified signal between the broadcast receiving unit 11 and the two-way-communications unit 12. A received signal received through two-way communications is similarly distributed by the distributor 10 after passing through the antenna 7, the duplexer 8, and the low noise amplifier 9. The distributor 10 divides the received signal from the transmitting/receiving antenna 7 into two parts, sends one of them to the broadcast receiving unit 11, and sends the other one of them to the two-waycommunications unit 12. The broadcast receiving unit 11 receives a broadcast signal, and reproduces and outputs AV data, such as voice data or image data. The frequency converter 14 converts a local oscillation signal generated by a phase-locked loop into a signal having a frequency corresponding to a selected channel according to a CH control signal for selecting the channel from two or more channels currently being broadcasted, and mixes a received RF signal and the frequency-converted local oscillation signal so as to generate a signal of a low frequency. The demodulator 15 performs demodulation, such as QPSK demodulation, on the signal of a low frequency, and the error correction unit 16 further performs demodulation processing by using an error correction code.
The packet extraction circuit 17 extracts packet data from the demodulated broadcast signal. It can be assumed that the broadcast signal is digitized, compressed and coded, and is further divided into packets, and these H.\teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 10 packets are transmitted one by one to each transmitting/receiving terminal equipment. The packet extraction circuit 17 identifies and extracts those packets which have been broadcasted to the corresponding transmitting/receiving terminal apparatus based on the header parts of the packets, and then processes the extracted packets. The AV data decompression circuit 18 decompresses each packet data extracted by the packet extraction circuit 17 so as to generate and outputs voice data and image data. At this time, the AV data decompression circuit 18 carries out a process of buffering the voice data and the image data generated thereby, sequentially combines the voice data and the image data with voice data and image data, which have been already transmitted as packets, respectively, and outputs them to the output interface circuit 19. The output interface circuit 19 converts and outputs the voice data and the image data according to an I/O method with which a display and a voice output unit not shown in Fig. 3 comply. The channel control unit 20 selects a broadcast channel via which the corresponding transmitting/receiving terminal apparatus will receive the broadcast signal according to an operator's channel selection operation, and informs the frequency converter 14 of the selected broadcast channel. When each transmitting/receiving terminal apparatus carries out reception of broadcasting services by sequentially switching among a plurality of Earth-orbiting satellites, or carries out reception of multi-beam broadcasting services from a satellite while moving among a plurality of beams, the channel control unit 20 can automatically deliver the CH control signal to the frequency converter based on the occurrence of a channel switching among the plurality of satellites or a channel switching among the plurality of beams.
Next, the operation of the two-way-communications unit 12 will be explained. A signal received, via a twoway-communications channel, by the transmitting/receiving H \teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 11 antenna 7 is delivered, via the duplexer 8, to the low noise amplifier 9, and is then amplified by the low noise amplifier 9. The distributor 10 then distributes the amplified signal to the frequency converter 21. The frequency converter 21 selects a two-way-communications channel according to the CH control signal from the control unit 25, and then converts a signal received via the selected two-way-communications channel into a signal of an intermediate frequency. The operation of this frequency converter 21 is the same as that of the frequency converter 14. When the frequency-converted and received signal is then inputted to the demodulator 22, the demodulator 22 carries out demodulation such as QPSK demodulation and the error correction unit 23 performs demodulation processing by using an error correction code.
The management data reproduction circuit 24 reproduces management data from the received signal. The method of transmitting the received signal through the two-way communications can be a packet method for use with reception of broadcasting services, and can alternatively be one of various methods, such as a TDM (time division multiplexing) method and an FDM (frequency division multiplexing) method. Which one of these methods is adopted can be determined based on the purpose of the use of each transmitting/receiving terminal apparatus for twoway communications, such as management of a moving object that carries each transmitting/receiving terminal apparatus or notification of an emergency that occurs in the moving object, and based on the number of transmitting/receiving terminal apparatus, the frequency at which communications are carried out, etc.
When the management command reproduced by the management data reproduction circuit 24 is inputted into the control unit 25, the control unit 25 performs processing according to the management command and delivers a response instruction to the response data generation circuit 26. The control unit 25 can have an H;\teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 12 output for display of the management command, and an input of response data when needed. The control unit generates and outputs the CH control signal for instructing the frequency converter 21 to perform a channel switching among a plurality of satellites, or to perform a channel switching among a plurality of beams when the corresponding transmitting/receiving terminal apparatus moves among the plurality of beams. The control unit 25 carries out processing depending upon the use of the corresponding transmitting/receiving terminal apparatus, such as management of a moving object that carries the transmitting/receiving terminal apparatus or notification of an emergency that occurs in the moving object, as will be explained below.
In the case of management of a moving object that carries a transmitting/receiving terminal apparatus 3, the gateway station 1 generates various types of management commands 5 and then transmits them to the transmitting/receiving terminal apparatus by using the downstream channel F2. The various types of management commands 5 include a health check command for causing the target transmitting/receiving terminal apparatus 3 to notify whether it is in a normal or abnormal operating condition to the gateway station 1, various types of information acquiring commands, such as a command for causing the target transmitting/receiving terminal apparatus 3 to notify the current position thereof to the gateway station 1 at predetermined intervals or in response to an event, and an information service command that does not necessarily require a response from the target transmitting/receiving terminal apparatus 3, such as provision of weather information, traffic information, etc. The control unit 25 sends a response instruction to the response data generation circuit 26 in response to the management command reproduced by the management command reproduction circuit 24, and the two-way-communications unit 12 transmits the response data 6 to the gateway H \teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 13 station 1 via the communication satellite by using the upstream channel F3. For example, when receiving a health check command, the transmitting/receiving terminal apparatus 3 determines whether a moving object that carries the transmitting/receiving terminal apparatus 3 is in a normal or abnormal operating condition, and transmits the response data 6 including the determination result to the gateway station 1 via the communication satellite by using the upstream channel F3. When the transmitting/receiving terminal apparatus 3 receives a position determination command, the control unit acquires position information, as a response input, from the GPS receiver and instructs the response data generation circuit 26 to incorporate the acquired position information into the response data 6, and the two-waycommunications unit 12 transmits the response data 6 to the gateway station 1 via the communication satellite by using the upstream channel F3.
In the use of notification of an emergency that occurs in a moving object that carries a transmitting/receiving terminal apparatus 3, the gateway station 1 generates various types of management commands and transmits them to each target transmitting/receiving terminal apparatus 3 by using the downstream channel F2, as in the case of management of the moving object. The various types of management commands 5 include a health check command for causing each target transmitting/receiving terminal apparatus 3 to notify whether it is in a normal or abnormal operating condition to the gateway station 1, and various types of information acquiring commands, such as a command for causing each target transmitting/receiving terminal apparatus 3 to notify the current position thereof to the gateway station 1 at predetermined intervals or in response to an event.
In response to such a management command, each transmitting/receiving terminal apparatus 3 detects either an abnormality of the transmitting/receiving terminal H,\teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 14 apparatus 3 itself, or an abnormality of the moving object that carries the transmitting/receiving terminal apparatus 3, and notifies the occurrence of an emergency in the same form as the response data 6 by using the upstream channel F3. The abnormal condition of a moving object can be a state in which an accident occurs in the moving object, such as a vehicle, a ship, or an aircraft, for example.
An operator, such as a driver, can input information indicating the occurrence of an abnormal condition into each transmitting/receiving terminal apparatus. As an alternative, there can be provided an apparatus for automatically detecting an abnormal condition of the moving object, such as a vehicle, and for inputting information indicating the detection of the abnormal condition into each transmitting/receiving terminal apparatus. In the case where the moving object is a vehicle, the above-mentioned automatically detecting apparatus can be so constructed as to detect unusual overheating of a particular part of the vehicle by using a thermometer. In the case where the moving object is a ship, the above-mentioned automatically detecting apparatus can be so constructed as to detect a flood by using a water level gauge. In the case where the moving object is an aircraft, the above-mentioned automatically detecting apparatus can be so constructed as to detect a rapid decrease or the like in the altitude of the aircraft by using an altimeter or the like. The case where the moving object, such as a vehicle, is stolen can be assumed to be an abnormal operating condition. For example, there can be provided an apparatus for detecting that an unauthorized release of a lock for theft prevention is carried out, and for inputting information indicating the fact into each transmitting/receiving terminal apparatus 3 for detection of thefts. In either case, when information indicating that the corresponding transmitting/receiving terminal apparatus 3 is in an abnormal operating condition is inputted to the transmitting/receiving terminal H.\teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 15 apparatus 3, the transmitting/receiving terminal apparatus 3 generates response data 6 including the information and notifies the occurrence of an emergency to the gateway station 1 by using the upstream channel F3.
The error correction coding unit 27 adds an error correction code to the response data generated by the response data generation circuit 26, and sends it to the modulator 28. The modulator 28 performs modulation, such as QPSK modulation, on the response data with the error correction code, and the RF converter 29 converts the signal including the modulated response data further into an RF signal. The high-power amplifier 13 then amplifies this RF signal. The output of the high-power amplifier 13 is sent to the transmitting/receiving antenna 7 via the duplexer 8, and the transmitting/receiving antenna 7 transmits it as an electric wave. The duplexer 8 separates the received .signal from the transmitting/receiving antenna 7 and the signal to be sent to the transmitting/receiving antenna 7 from each other.
Thus, each transmitting/receiving terminal apparatus 3 distributes the received signal received via the transmitting/receiving antenna 7 between the broadcast receiving unit 11 and the two-way-communications unit 12 so as to cause them to process the received signal, respectively. Then, by making the two-way-communications unit 12 to generate response data and send it, via the duplexer 8, to the transmitting/receiving antenna 7, and transmitting it by way of the transmitting/receiving antenna 7, each transmitting/receiving terminal apparatus 3 can perform both reception of broadcasting services and two-way communications. Since each transmitting/receiving terminal apparatus 3 can perform reception and transmission by way of the transmitting/receiving antenna 7, the downsizing of each transmitting/receiving terminal apparatus 3 can be achieved.
In Fig. 3, although a signal to be transmitted from the two-way-communications unit 12 is inputted into the H:\teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 16 transmitting/receiving antenna 7 via the duplexer 8, each transmitting/receiving terminal apparatus 3 can be so constructed that the transmitting/receiving antenna 7 is divided into a receiving antenna and a transmitting antenna, a received signal received via the receiving antenna is inputted into the low noise amplifier 9 and a signal to be transmitted from the two-way-communications unit 12 is inputted into the transmitting antenna. In this case, the duplexer 8 becomes unnecessary.
Embodiment 2.
Each transmitting/receiving terminal apparatus according to embodiment 2 of the present invention will be explained with reference to Fig. 4. Fig. 4 is a block diagram showing the structure of the transmitting/receiving terminal apparatus in accordance with embodiment 2. In Fig. 4, reference numeral denotes a first two-way-communications unit for carrying out two-way communications with a gateway station 1 via a communication satellite 2, reference numeral 31 denotes a second two-way-communications unit for carrying out twoway communications with the gateway stations 1 via the communication satellite 2, and reference numeral 32 denotes a switcher for switching between a transmitted signal output from the first two-way-communications unit and a transmitted signal from the second two-waycommunications unit 31, and for outputting a selected one of the transmitted signals to a high-power amplifier 13.
In Fig. 4, the same reference numerals as shown in Fig. 3 denote the same parts or components as shown in Fig. 3 or like parts or components.
For example, there can be cases where a two-waycommunications unit intended for management of the operation of a moving object that carries a transmitting/receiving terminal apparatus is disposed as the first two-way-communications unit 30 and another twoway-communications unit intended for notification of an H,\teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 17 emergency that occurs in the moving object as the second two-way-communications unit 31. Since the operation of a broadcast receiving unit 11 and the operations of the blocks 21 to 29 disposed in each of the first two-waycommunications unit 30 and the second two-waycommunications unit 31 are the same as those of the corresponding components of each transmitting/receiving terminal apparatus in accordance with embodiment 1, the explanation of those operations will be omitted. A distributor 10 distributes a received signal received via a transmitting/receiving antenna 7 among three destinations: the broadcast receiving unit 11, the first two-way-communications unit 30, and the second two-waycommunications unit 31. A signal to be transmitted from the first two-way-communications unit 30 and a signal to be transmitted from the second two-way-communications unit 31 are inputted into a switcher 32. The switcher 32 selects one of those signals to be transmitted and outputs the selected one to a high-power amplifier 13. The highpower amplifier 13 amplifies the selected signal and delivers it to the transmitting/receiving antenna 7 via the duplexer 8, and the amplified signal is then transmitted, as an electric wave, to a communication satellite 2 by way of the transmitting/receiving antenna 7. Thus, each transmitting/receiving terminal apparatus according to embodiment 2 of the present invention can simultaneously perform reception of broadcasting services and two or more two-way communications.
In Fig. 4, although the transmitting/receiving antenna 7 are shared between reception and transmission of electric waves, each transmitting/receiving terminal apparatus 3 can be so constructed that the transmitting/receiving antenna 7 is divided into a receiving antenna and a transmitting antenna, a received signal received via the receiving antenna is inputted into the low noise amplifier 9 and a signal to be transmitted from the first two-way-communications unit 30 and a signal H \teresab\keep\Speci\P526S8 03110-AU.doc 6/04/04 18 to be transmitted from the second two-way-communications unit 31 are inputted into the transmitting antenna via the switcher 32 and the high-power amplifier 13. In this case, the duplexer 8 becomes unnecessary.
Many widely different embodiments of the present invention may be constructed without departing from the spirit and scope of the present invention. It should be understood that the present invention is not limited to the specific embodiments described in the specification, except as defined in the appended claims.
In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.
It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country.
H:\tereeab\keep\Speci\P52688 03110-AU.doc 6/04/04
Claims (6)
1. A transmitting/receiving terminal apparatus comprising: a transmitting/receiving antenna for transmitting and receiving electric waves to and from a satellite; a duplexer for separating a signal received via said transmitting/receiving antenna and a signal to be transmitted via said transmitting/receiving antenna from each other; a distributor for distributing a received signal from said duplexer; a broadcast receiving unit for converting the received signal distributed thereto from said distributor into a signal of a lower frequency and performing data decompression on this signal, and for reproducing either an image or a voice; and a two-way-communications unit for converting the received signal distributed thereto from said distributor into a signal of a lower frequency and reproducing a management command from this signal, and for generating a response signal, said transmitting/receiving terminal apparatus transmitting the response signal generated by said two-way-communications unit to said satellite by way of said duplexer and said transmitting/receiving antenna.
2. The transmitting/receiving terminal apparatus according to Claim i, wherein said two-way-communications unit reproduces a management command for causing said transmitting/receiving terminal apparatus to carry out communications for management communications or for notification of occurrence of an emergency, and transmits a response signal.
3. A transmitting/receiving terminal apparatus comprising: a receiving antenna for receiving electric waves from H:\teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 20 a satellite; a transmitting antenna for transmitting a signal to be transmitted, as an electric wave, to said satellite; a duplexer for separating a signal received via said transmitting antenna and a signal to be transmitted via said transmitting antenna from each other; a distributor for distributing a received signal from said duplexer; a broadcast receiving unit for converting the received signal distributed thereto from said distributor into a signal of a lower frequency and performing data decompression on this signal, and for reproducing either an image or a voice; and a two-way-communications unit for converting the received signal distributed thereto from said distributor into a signal of a lower frequency and reproducing a management command from this signal, and for generating a response signal, said transmitting/receiving terminal apparatus transmitting the response signal generated by said two-way-communications unit to said satellite by way of said duplexer and said transmitting antenna.
4. The transmitting/receiving terminal apparatus according to Claim 3, wherein said two-way-communications unit reproduces a management command for causing said transmitting/receiving terminal apparatus to carry out communications for management communications or for notification of occurrence of an emergency, and transmits a response signal.
A transmitting/receiving terminal apparatus comprising: a transmitting/receiving antenna for transmitting and receiving electric waves to and from a satellite; a duplexer for separating a signal received via said transmitting/receiving antenna and a signal to be transmitted via said transmitting/receiving antenna from H:\teresab\keep\Speci\P52688 03110-AU.doc 6/04/04 L 21 each other; a distributor for distributing a received signal from said duplexer; a broadcast receiving unit for converting the received signal from said distributor into a signal of a lower frequency and performing data decompression on this signal, and for reproducing either an image or a voice; first and second two-way-communications units each for converting the received signal from said distributor into a signal of a lower frequency and reproducing a control signal from this signal, and each for generating a response signal; and a switcher for selecting one of the response signals generated by said first and the second two-way- communications units, said transmitting/receiving terminal apparatus transmitting the selected response signal by way of said duplexer and said transmitting/receiving antenna.
6. The transmitting/receiving terminal apparatus according to Claim 5, wherein said first two-way- communications unit reproduces a management command for causing said transmitting/receiving terminal apparatus to carry out communications for management and delivers the response signal to said switcher, and said second two-way- communications unit reproduces a management command for causing said transmitting/receiving terminal apparatus to carry out communications for notification of occurrence of an emergency and transmits the response signal to said switcher. Dated this 6th day of April 2004 MITSUBISHI DENKI KABUSHIKI KAISHA By their Patent Attorneys GRIFFITH HACK Fellows Institute of Patent and Trade Mark Attorneys of Australia Ht\teresab\keep\Speci\P52688 03110-AU.doc 6/04/04
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003119603A JP4559037B2 (en) | 2003-04-24 | 2003-04-24 | Transmission / reception terminal device |
| JP2003-119603 | 2003-04-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2004201468A1 true AU2004201468A1 (en) | 2004-11-11 |
| AU2004201468B2 AU2004201468B2 (en) | 2006-11-30 |
Family
ID=33498784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2004201468A Ceased AU2004201468B2 (en) | 2003-04-24 | 2004-04-06 | Transmitting/receiving terminal apparatus |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4559037B2 (en) |
| KR (1) | KR100576301B1 (en) |
| AU (1) | AU2004201468B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101527406B1 (en) * | 2014-01-20 | 2015-06-09 | (주)인텔리안테크놀로지스 | Maritime satellite antenna functioning as both TVRO antenna and VSAT antenna |
| KR101863567B1 (en) * | 2018-01-18 | 2018-06-01 | 주식회사 케이앤에스아이앤씨 | Hybrid antenna system and control method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4129123A1 (en) * | 1991-09-02 | 1993-03-04 | Henkel Kgaa | METHOD FOR CLEANING HARD SURFACES, IN PARTICULAR IN CLEANROOMS |
| KR19990039706A (en) * | 1997-11-13 | 1999-06-05 | 윤종용 | PC communication device using modem communication of satellite broadcasting receiver |
| JP2002369173A (en) * | 2001-06-04 | 2002-12-20 | Aruze Corp | Two-way communication system |
| KR20030045263A (en) * | 2001-12-01 | 2003-06-11 | 삼성전자주식회사 | Method of forming transistor having LDD type source/drain structure |
| US7587736B2 (en) * | 2001-12-28 | 2009-09-08 | Xanadoo Company | Wideband direct-to-home broadcasting satellite communications system and method |
-
2003
- 2003-04-24 JP JP2003119603A patent/JP4559037B2/en not_active Expired - Fee Related
-
2004
- 2004-04-06 AU AU2004201468A patent/AU2004201468B2/en not_active Ceased
- 2004-04-20 KR KR1020040027076A patent/KR100576301B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR20040092429A (en) | 2004-11-03 |
| JP4559037B2 (en) | 2010-10-06 |
| AU2004201468B2 (en) | 2006-11-30 |
| KR100576301B1 (en) | 2006-05-03 |
| JP2004328326A (en) | 2004-11-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2005323392A (en) | Radiotelephone system for measuring subscriber position accompanied by diversity transmission | |
| KR101242510B1 (en) | Satellite broadcasting system and signal receive method thereof | |
| JP2007251705A (en) | Transmission state display method | |
| AU2004201468B2 (en) | Transmitting/receiving terminal apparatus | |
| CN1980399A (en) | Apparatus and method for providing digital multimedia breadcasting service in area of weak current | |
| US6501938B1 (en) | Satellite broadcasting system and broadcasting satellite | |
| JP4537926B2 (en) | Wireless relay system and relay monitoring method | |
| AU2003248464B2 (en) | Satellite communication method, and mobile station and gateway station for use with the satellite communication method | |
| KR101920304B1 (en) | Method and apparatus for providing digital broadcast signal | |
| KR100542973B1 (en) | Apparatus and method for using time division multiplexing path in satellite digital multimedia broadcastng system a | |
| KR101032427B1 (en) | Broadcasting for warning disaster using satellite | |
| JPH11284963A (en) | Information supply method on broadcasting wave and reception device receiving broadcasting wave | |
| US8014479B2 (en) | Method and system for communicating sub-synchronization signals using a phase rotator | |
| KR102475922B1 (en) | DMB Emergency broadcasting system and control method thereof | |
| JP4320297B2 (en) | Digital broadcast packet configuration method and real-time data transmission / reception system | |
| JP4561184B2 (en) | Air-to-air communication system | |
| JP4170442B2 (en) | Digital broadcast receiving terminal | |
| AU2006201548A1 (en) | Satellite communication method, and satellite communication apparatus, earth station, and gateway station for use with the satellite communication method | |
| KR970064254A (en) | Wireless transmission device of digital image and receiving device of the video signal | |
| JP2008236047A (en) | Relay system and master station apparatus and slave station apparatus used for relay system | |
| EP2357746A1 (en) | Apparatus and method for transmitting service contents and emergency broadcasting apparatus | |
| JPH06232849A (en) | Communication system | |
| KR100813689B1 (en) | Broadcasting signal receiving apparatus of digital multimedia broadcasting system and method thereof | |
| JP2004104578A (en) | Repeating device | |
| JP2004007633A (en) | Mobile digital broadcast system and terminal therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |