JP2006025252A - Radio communication system, method thereof, and mobile station radio communication equipment thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication system having a function by which radio communication equipment on a mobile station side receives a control data signal transmitted from radio communication equipment of a base station and controls a PTT switch, a method thereof, and mobile station radio communication equipment thereof. <P>SOLUTION: The radio communication system comprises radio communication equipment in the base station side and radio communication equipment in the mobile station side. The radio communication equipment in the base station side includes a key input part 13 for inputting control data in accordance with a data format, a digital data encoder 14 for converting control data to a control data signal, and a transmission part 100 for transmitting the control data signal, in order to control the PTT switch of the radio communication equipment in the base station side of the radio communication system. The radio communication equipment in the mobile station side includes a reception part 200 for receiving the transmitted control data signal, a digital data decoder 26 for decoding the control data signal to control data, and a control means 25 for interpreting control data decoded by the digital data decoder to control the PTT switch. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a commercial radio communication system, and more particularly, to a radio communication system having a function of controlling a press talk (PTT) switch of a radio communication device on a mobile station side by a radio communication device on a base station side. The present invention relates to a method and a radio communication apparatus for the mobile station.

  When voice communication is performed in a conventional commercial wireless communication system, a person using the wireless communication device on the other station side turns on the PTT switch to transmit the sound from the wireless communication device on the other station. Had to do the operation. Therefore, if the user on the other station side is away from the radio, abandons work, or if it is impossible to operate the radio communication device in an emergency state, It was impossible to grasp the situation.

In the remote control wireless device, a remote control command and a voice signal are sent from the commander to the HF wireless device having a transporter function as described in Patent Document 1, using the VHF band. Means are known for transmitting the audio signal in the HF band, receiving a response, and transmitting the received audio signal to the commander using the VHF band or the UHF band. However, this is a problem in that it is necessary to separately provide a frequency band to be used.
JP 2001-320298 A

  The present invention has been made to solve such a problem, and an object thereof is to provide a subcarrier MSK modem that does not require a plurality of radio frequency bands and uses a frequency range of the same voice frequency band. In this wireless communication system, the wireless communication system on the mobile station side receives the control data signal transmitted from the wireless communication apparatus of the base station and controls the PTT switch, its method, and its movement A station wireless communication device is provided.

The wireless communication system of the present invention is a wireless communication system comprising voice and data transmission / reception means.
A key input unit for inputting control data in accordance with a data format in order to control the PTT switch of the wireless communication device on the mobile station side of the wireless communication system;
An encoder of digital data for converting the control data into a control data signal;
A wireless communication device on the base station side of the wireless communication system having a transmission unit for transmitting the control data signal;
A receiver for receiving the transmitted control data signal;
A decoder of digital data for restoring the control data signal to the control data;
The wireless communication device on the mobile station side of the wireless communication system, comprising control means for decoding the control data restored by the decoder of the digital data and controlling the PTT switch;
It is characterized by comprising.

The wireless communication system of the present invention is a wireless communication system comprising data transmission / reception means using an MSK modem (minimum shift keying modem).
A key input unit for inputting control data in accordance with a data format in order to control the PTT switch of the wireless communication device on the mobile station side of the wireless communication system;
An MSK encoder for converting the control data into a control data signal;
A wireless communication device on the base station side of the wireless communication system having a transmission unit for transmitting the control data signal;
A receiver for receiving the transmitted control data signal;
An MSK decoder for restoring the control data signal to the control data;
The wireless communication device on the mobile station side of the wireless communication system, having control means for decoding the control data restored by the MSK decoder and controlling the PTT switch;
It is characterized by comprising.

A wireless communication method of the present invention is a wireless communication method of a wireless communication system provided with data transmission / reception means using an MSK modem (minimum shift keying modem).
The wireless communication device on the base station side of the wireless communication system inputs control data for controlling the PTT switch according to the data format;
Converting the input control data into a control data signal by an MSK encoder, and transmitting the control data signal;
A radio communication device on a mobile station side of the radio communication system receives the control data signal and restores the control data to an MSK decoder;
The control unit includes a step of decoding the control data and controlling the PTT switch.

A mobile station radio communication device of the present invention is a mobile station radio communication device of a radio communication system provided with data transmission / reception means by an MSK modem (minimum shift keying modem),
In order to control the PTT switch of the wireless communication device on the mobile station side of the wireless communication system, a receiving unit that receives the control data signal transmitted by converting the control data input according to the data format into a control data signal;
An MSK decoder for restoring the control data signal to control data;
And control means for decoding the control data restored by the MSK decoder and controlling a PTT switch.

  According to the radio communication system of the present invention, in a radio communication system having a subcarrier MSK modem using a frequency range of the same voice frequency band without requiring a plurality of radio frequency bands, a radio communication device on the mobile station side However, it is possible to provide a radio communication system having a function of receiving a control signal transmitted from a radio communication device of a base station and controlling a PTT switch, its method, and its mobile station radio communication device.

  Embodiments of a wireless communication system according to the present invention will be described with reference to the drawings. FIG. 5 is an image diagram showing the operation of the wireless communication system of the present invention. At arrow 1, a command is set so that the mobile station can be controlled from the base station using a PC command from the PC terminal. In the arrow 2, the command input to the base station is converted into a transmission signal and transmitted to the mobile station. At arrow 3, the transmission signal received by the mobile station is restored to a command, and the mobile station is set to the transmission state according to this command. The user of the mobile station can transmit voice to the base station side without performing a transmission operation.

  FIG. 2 is a circuit block diagram showing a transmitter of the base station side radio communication device of the radio communication system according to the present invention. The transmission device includes a microphone 10, a microphone amplifier 11, a pre-emphasis circuit 12, a key input unit 13, an MSK encoder 14, a first switch 17, and an antenna 18. The transmission unit 100 includes a modulator 15 and a transmission circuit 16.

  FIG. 3 is a data format diagram showing control data transmitted from the radio communication device on the base station side. PRM and SYNC are synchronization signal units for setting a synchronization signal common to all data. The FMT is an instruction part for setting a message instruction, and is a data part including a status (STATUS) part for setting a status code and a response (RESP) part for setting a response request. The MSG is a message part for setting a predetermined data type, and includes Status, ACK, NACK, GPS, and the like. The ID is an ID part that also serves as authentication indicating from whom to whom information is transmitted. FMT2 is a second data part.

  In FIG. 2, control data according to the data format of FIG. 3 is input from the key input unit 13 of the wireless communication device on the base station side. Specifically, a PTT switch control command is set in the MSG unit. Next, details of transmission are set in the status section of the instruction section (for example, a report on the current business situation or an emergency situation report), and 1 indicating a response request is set in the response section. A transmission time is set in FMT2. Prior to the input of the control data, the ID data of the wireless communication device on the mobile station side that is the transmission partner is input.

  The MSK encoder 14 receives these ID data and control data, converts them into an ID data signal and a control data signal, and inputs them to the modulator 15 of the transmission field 100. The input ID data signal and control data signal are FSK (frequency shift keying) modulated, high frequency power amplified by the transmission circuit 16, and transmitted from the antenna 18 via the first switch 17 linked to the PTT switch. To the wireless communication device on the mobile station side.

  FIG. 1 is a circuit block diagram of a mobile station side radio communication device of a radio communication system according to the present invention. Blocks having the same functions as those of the circuit block shown in FIG. 2 are given the same numbers. The mobile station side wireless communication device includes a microphone 10, a second switch 23, a microphone amplifier 11, a pre-emphasis circuit 12, a transmission unit 100, a first switch 17, an antenna 18, a speaker 20, a voice power amplifier 21, and a de-emphasis circuit. 22, a PTT switch 24, a control unit 25, an MSK decoder 26, and a receiving unit 200. The transmission unit 100 includes a modulator 15 and a transmission circuit 16, and the reception unit 200 includes a demodulator 27 and a reception circuit 28.

  In FIG. 1, an ID data signal and a control data signal transmitted from the base station-side wireless communication device shown in FIG. 2 are received by the receiving circuit 28 of the receiving unit 200 via the antenna 18 and the first switch 17. Is input. The ID data signal and the control data signal that have been amplified by the receiver 200 are input to the demodulator 27. After the FSK modulation is demodulated by the demodulator 27, the ID data signal and the control data signal are input to the MSK decoder 26 and restored to the ID data and the control data. If the restored ID data matches the ID of the wireless communication device of the mobile station, the control means 25 controls the PTT switch 24 based on the control data.

  The PTT switch 24 sets the first switch 17 to the transmission side under the control of the control means 25, cancels the microphone mute of the second switch 23, connects the microphone 10 and the microphone amplifier 11, and performs sound for a predetermined time. Can be sent. The control means 25 inputs a message signal to the voice power amplifier 21 according to the message number set in the message part of the data format, conveys the message by voice, and prompts a quick response.

  The audio signal from the microphone 10 is amplified by the microphone amplifier 11, and the high frequency of the audio signal is emphasized by +6 dB / oct to improve the S / N by the pre-emphasis circuit 12, and is sent to the modulator 15 of the transmission unit 100. Entered. The input audio signal is FSK modulated, high-frequency power amplified by the transmission circuit 16, and transmitted from the antenna 18 to the radio communication device of the base station via the first switch 17 interlocked with the PTT switch.

  The circuit configuration shown in FIG. 1 and FIG. 2 may be any circuit or device as long as it realizes the function, and a part of the function can be realized by software. . Further, the means for realizing the function may be realized by a plurality of circuits, and the plurality of functions may be realized by a single circuit. In this embodiment, the control means 25 conveys the message by voice, but the message may be displayed on a display device incorporated in the wireless communication device of the mobile station.

  FIG. 4 is a flowchart showing a sequence of the wireless communication method according to the present invention. In FIG. 4, the radio communication device on the base station side of the radio communication system inputs control data and ID data for controlling the PTT switch 24 of the counterpart radio communication device from the key input unit 13 (step 100). If it is confirmed that the input control data conforms to the data format, it is input to the MSK encoder 14 (step 110). The input control data and ID data are converted into a control data signal and an ID data signal by the MSK encoder 14 (step 120). The converted control data signal and ID data signal are transmitted to the counterpart wireless communication device (step 130). The counterpart wireless communication device on the mobile station side of the wireless communication system receives the control data signal and the ID data signal (step 140). The MSK decoder 26 restores control data and ID data (step 150). It is checked whether or not it matches the ID of the designated mobile station wireless communication device (step 160). If they match, the control unit 25 decodes the control data and controls the PTT switch 24 (step 170). The PTT switch 24 receives the control signal, controls the first switch 17 and the second switch 23, and sets the wireless communication device to the transmission state for a predetermined time (step 180). The control unit 25 transmits the message by voice, prompts a response, and finishes (step 190, step 200).

  As described above, according to the radio communication system, radio communication method and mobile station radio communication apparatus of the present invention, a plurality of radio frequency bands are not required and sub-ranges using the same audio frequency band frequency range are used. In a wireless communication system equipped with a carrier MSK modem, a wireless communication device on the mobile station side can receive a control data signal transmitted from a base station, control a PTT switch, and set the transmission state. . As a result, even in a situation where the operator on the mobile station side cannot directly operate the wireless communication device, it is possible to quickly respond to the message requested by the base station side by voice.

  The present invention can be applied to a work site where it is necessary to monitor the situation as appropriate, but it is difficult to immediately respond by interrupting the work, or a work site where interruption is dangerous.

The circuit block diagram of the mobile station side radio | wireless communication apparatus of the radio | wireless communications system by this invention. The circuit block diagram which shows the transmitter of the base station side radio | wireless communication apparatus of the radio | wireless communications system by this invention. The data format figure which shows control data. The flowchart which shows the sequence of the radio | wireless communication method by this invention. The image figure which shows operation | movement of the radio | wireless communications system of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Microphone 11 Microphone amplifier 12 Pre-emphasis circuit 13 Key input part 14 MSK encoder 15 Modulator 16 Transmission circuit 17 1st switch (S1)
18 Antenna 20 Speaker 21 Audio Power Amplifier 22 De-emphasis Circuit 23 Second Switch (S2)
24 PTT switch 25 Control means 26 MSK decoder 27 Demodulator 28 Reception circuit 100 Transmission unit 200 Reception unit PRM Preamble unit SYNC Synchronization signal unit FMT Instruction unit MSG Message unit

Claims (4)

In a wireless communication system including voice and data transmission / reception means,
A key input unit for inputting control data in accordance with a data format in order to control the PTT switch of the wireless communication device on the mobile station side of the wireless communication system;
An encoder of digital data for converting the control data into a control data signal;
A wireless communication device on the base station side of the wireless communication system having a transmission unit for transmitting the control data signal;
A receiver for receiving the transmitted control data signal;
A decoder of digital data for restoring the control data signal to the control data;
The wireless communication device on the mobile station side of the wireless communication system, comprising control means for decoding the control data restored by the decoder of the digital data and controlling the PTT switch;
A wireless communication system comprising: In a wireless communication system provided with data transmission / reception means by an MSK modem (minimum shift keying modem),
A key input unit for inputting control data in accordance with a data format in order to control the PTT switch of the wireless communication device on the mobile station side of the wireless communication system;
An MSK encoder for converting the control data into a control data signal;
A wireless communication device on the base station side of the wireless communication system having a transmission unit for transmitting the control data signal;
A receiver for receiving the transmitted control data signal;
An MSK decoder for restoring the control data signal to the control data;
The wireless communication device on the mobile station side of the wireless communication system, having control means for decoding the control data restored by the MSK decoder and controlling the PTT switch;
A wireless communication system comprising: In a radio communication method of a radio communication system provided with data transmission / reception means by an MSK modem (minimum shift keying modem),
The wireless communication device on the base station side of the wireless communication system inputs control data for controlling the PTT switch according to the data format;
Converting the input control data into a control data signal by an MSK encoder, and transmitting the control data signal;
A radio communication device on a mobile station side of the radio communication system receives the control data signal and restores the control data to an MSK decoder;
And a step of controlling the PTT switch by the control unit decoding the control data. A mobile station wireless communication device of a wireless communication system provided with data transmission / reception means by an MSK modem (minimum shift keying modem),
In order to control the PTT switch of the wireless communication device on the mobile station side of the wireless communication system, a receiving unit that receives the control data signal transmitted by converting the control data input according to the data format into a control data signal;
An MSK decoder for restoring the control data signal to control data;
A mobile station radio communication device comprising: control means for decoding the control data restored by the MSK decoder and controlling a PTT switch.

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