JP2007060071A - Wireless communication apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communication apparatus capable of automatically executing talkaround operations when the communication apparatus makes transmission by trunked system communication exchange and fails to make the transmission. <P>SOLUTION: When the wireless communication apparatus exchanges communication with another wireless communication apparatus, they can select communication exchange using the same frequency or communication exchange using frequencies shifted by a prescribed frequency via a repeater, the wireless communication apparatus stores in advance a communication exchange instruction by a talkaround function instructed by a talkaround communication exchange instruction signal from an external connector 7 to a microcomputer 6, when the wireless communication apparatus detects transmission fault(s) for once or more predetermined consecutive number of times in the case of transmission by the trunked system communication exchange, the apparatus references the stored communication exchange instruction by the talkaround function, sets the reception frequency to the transmission frequency of the communication exchange opposite party to carry out transmission processing when the communication exchange instruction by the talkaround function is received as a result of the reference, and informs the communication exchange opposite party about malfunction of communication exchange by the repeater when the apparatus can exchange communication with the opposite party. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless communication device, and when performing communication with two or more wireless communication devices, selecting communication at the same frequency and communication using a frequency shifted by a predetermined frequency via a repeater. The present invention relates to a wireless communication device that can be used.

  Conventionally, when communication is performed between at least two wireless communication devices, the transmission / reception frequencies of the wireless communication devices are set to be the same, and if the wireless communication device is for a short distance, the output level is set low. It was necessary to communicate with a wireless communication device for distances with a high output level. On the other hand, there is also a case where communication is performed via a repeater, that is, a repeater. In this case, within the region covered by the output of the repeater, a predetermined frequency is shifted between the transmission frequency and the reception frequency, and the shifted frequency is used. Some communicate with each other. In a communication method that communicates via a repeater, since a repeater is used, the output level of the wireless communication device used may not be so high. However, it cannot be used substantially outside the range of the repeater output, and its application is limited.

Therefore, the so-called talk that the transmission frequency of the wireless communication device can be converted and switched between a communication method using a frequency shifted from the reception frequency by a predetermined frequency and a communication method in which the transmission and reception frequencies of the wireless communication device are the same. In the method of performing communication between at least two wireless communication devices when the around (TA) communication function is selected, a first transmission / reception mechanism that allows each wireless communication device to communicate at the same frequency, and a repeater And a control means for controlling switching between the first and second transmission / reception mechanisms, and an output from the repeater. There is known a communication method selection system configured to detect the degree of noise and control the control means in accordance with the detected output. (E.g., see Patent Document 1).
Japanese Patent Laid-Open No. 5-37418

  On the other hand, when the wireless communication device A and the wireless communication device B communicate using the repeater a, the wireless communication device C and the wireless communication device D cannot communicate using the repeater a, and the repeater a becomes free. However, the repeater b is automatically selected instead of the repeater a so that the wireless communication device C and the wireless communication device D can communicate with each other through the repeater b. Trunked systems that increase the efficiency of use are known.

  The case of transmission by trunked system communication will be described with reference to FIG. A transmission instruction is given by turning on the PTT (Push To Talk) switch of the wireless communication device while waiting for communication from the other party (step S1), and the wireless communication device performs a transmission process via the repeater (step S1). S2). Subsequent to step S2, the wireless communication device performs transmission, and determines whether or not transmission has failed (step S3). Here, whether or not transmission has failed is determined based on whether or not a signal has returned from the repeater within a predetermined period from the time of transmission. If no signal has returned, it is determined that transmission has failed.

  If it is determined in step S3 that transmission has failed, it is determined subsequent to step S3 whether or not transmission has failed for a predetermined number of times, for example, six times (step S4). If it is determined in step S4 that the transmission has failed six times in succession, a transition is made to a standby state (step S5). If transmission has not failed in step S3, or if transmission has not failed six times in succession in step S4, transition is made to communication (step S6).

  Transmission is performed in the above trunked system communication. If transmission fails, a separately provided TA communication switch is pressed to notify the communication partner that the transmission has failed, and then a talk-land communication operation is performed.

  As described above, conventionally, when a TA communication switch is independently provided in a wireless communication device, transmission is performed by trunked system communication, and transmission fails and a talk-land operation is performed, the TA communication switch must be pressed to transmit and receive the frequency. Must be set to the same frequency and the communication partner must be notified. For this reason, the transmitting side needs to know that transmission failed in the trunked system communication.

  It is an object of the present invention to provide a radio communication apparatus which can automatically perform a talk-land operation without the need to press a TA communication switch when transmission by trunked system communication is performed and transmission fails. And

  In the wireless communication device according to claim 1 of the present invention, when communication is performed with two or more wireless communication devices, communication using the same frequency and communication using a frequency shifted by a predetermined frequency via a repeater are performed. In a wireless communication device that can select the number of consecutive communication times stored in advance by the talk-land function instructed by the talk-land communication instruction signal, and at least one predetermined number of times determined during transmission by the trunked system communication When the transmission failure is detected, the stored communication instruction by the talk-land function is referred to. When the communication with the other party is completed, the communication partner is notified that the communication by the repeater is not good.

  According to the wireless communication device according to claim 1 of the present invention, when communication is performed with two or more wireless communication devices, communication at the same frequency and a frequency shifted by a predetermined frequency via a repeater are used. In a wireless communication device that can select communication, a communication instruction by the talk-land function instructed by the talk-aland communication instruction signal is stored in advance, and one or more consecutive times predetermined at the time of transmission by trunked system communication When the number of transmission failures is detected, the stored communication instruction by the talk-land function is referred to. When the communication instruction by the talk-land function is given as a result of this reference, the reception frequency is the transmission of the communication partner. When the transmission processing is performed with the frequency set, and communication with the other party is possible by this transmission processing, the communication with the repeater is not good. There is notified to the communication partner.

  Therefore, according to the wireless communication apparatus of the first aspect of the present invention, when transmission failure of one or more predetermined times is detected during transmission by trunked system communication, communication by the talk-land function is performed. If the instruction is stored, the TA operation instruction need not be performed by a switch or the like, and the TA communication switch is not required to be operated. If it is not possible to link to the repeater by transmitting to the repeater, if the trunk communication is instructed but the TA communication operation instruction is stored, the reception frequency of the wireless communication device is matched with the transmission frequency of the communication partner, so The communication partner is informed that it is not possible to communicate with the repeater.

  Embodiments of a wireless communication device according to the present invention will be described below.

  FIG. 1 is a block diagram showing a configuration of a wireless communication device according to an embodiment of the present invention.

  As shown in FIG. 1, the wireless communication device 40 according to the embodiment of the present invention includes a transmission unit 20 and a reception unit 30.

  The transmitter 20 amplifies the audio signal from the microphone 1 with the microphone amplifier 2, uses the output signal from the microphone amplifier 2 as the modulation signal, and uses the modulation signal as the carrier wave supplied from the PLL frequency synthesizer 5. The FM modulation output is frequency-mixed by the mixer 4 with the local oscillation frequency signal supplied from the PLL frequency synthesizer 5 and converted into a transmission frequency signal, that is, a transmission frequency signal. The converted output signal of the transmission frequency is supplied to the transmission signal amplifier 8 and amplified, then supplied to the transmission power amplifier 9 and amplified, and transmitted from the antenna 11 through the antenna switch 10. Here, the number of carriers to be FM-modulated may be used as the transmission frequency and the transmission frequency. In this case, the mixer 4 can be omitted.

  The receiving unit 30 supplies the received signal received by the antenna 11 to the RF amplifier 13 via the antenna switch 10 and amplifies it. The output of the RF amplifier 13 is a local oscillation frequency output from the PLL frequency synthesizer 5 and a mixer. 14, the frequency is mixed and converted to an intermediate frequency and then supplied to the bandpass filter 15 to limit the band. The output from the bandpass filter 15 is supplied to the intermediate frequency circuit 16 including the FM demodulation circuit and the tone squelch circuit and demodulated. When the tone signal matches the tone signal of the receiver 30, the squelch circuit is opened, and the demodulated tone signal is amplified by the AF amplifier 17 to drive the speaker 18.

  The wireless communication device 40 further includes an external connector 7 and a microcomputer 6. A microcomputer 6 receives a trunked system communication instruction signal for instructing communication by the trunked system supplied via the external connector 7, a TA communication instruction signal for instructing communication by the TA communication function, and a frequency instruction signal for instructing a transmission frequency. The microcomputer 6 stores the input information.

  Further, the microcomputer 6 refers to the stored information inputted and stored, and when the trunked system communication instruction signal is instructed by the trunked system communication instruction signal, controls the transmission frequency to the frequency corresponding to the frequency instruction signal. In addition, in cooperation with the mixer 14, the reception frequency is controlled to a frequency shifted by a predetermined frequency from the transmission frequency, that is, the transmission frequency of the communication partner, and whether or not transmission by the trunked system communication has failed is determined. When the transmission by the trunked system communication fails continuously for a predetermined number of times, for example, six times, this is detected, and if these are detected, it is searched whether or not the TA communication instruction is made. When TA communication is instructed, it is received at the same frequency as the transmission frequency instructed by the frequency instruction signal. Set the frequency, when the communication with the other wireless communication device is detected by the communication by the setting, and notifies the partner station that transmitted by trunk de system communication fails, it performs a reception open tone squelch circuit.

  Next, the operation of the wireless communication device 40 will be described with reference to FIG.

  In the wireless communication device 40, when the trunked system communication is instructed by the trunked system communication instruction signal, transmission is performed by turning on the PTT (Push To Talk) switch of the wireless communication device while waiting for communication from the other party. An instruction is issued (step S11), and the wireless communication device performs a transmission process via the repeater at the transmission frequency based on the frequency instruction signal via the repeater (step S12). Subsequent to step S12, the wireless communication device performs transmission based on trunked system communication, and determines whether or not transmission has failed (step S13). If no signal is returned from the repeater within a predetermined period from the time of transmission, it is determined that transmission has failed. If it is determined in step S13 that the transmission is not unsuccessful, it is determined whether the transmission has failed continuously for a predetermined number of times, for example, six times (step S14).

  If it is determined in step S13 that the transmission has failed, or if it is determined in step S14 that the transmission has failed continuously six times, it is checked whether a TA communication instruction has been issued (step S15). Here, whether or not the TA communication instruction is issued in step S15 is already read through the external connector 7 and stored in the microcomputer 6, so it is only necessary to refer to the stored TA communication instruction. . If it is determined in step S15 that a TA communication instruction has not been issued, a transition is made to a standby state (step S16). If it is determined in step S14 that the transmission has failed continuously six times, a transition is made to communication (step S17).

  If it is determined in step S15 that a TA communication instruction has been issued, the reception frequency in the receiving unit 30 is set to the transmission frequency of the communication partner, so that the transmission / reception frequency of the wireless communication device 40 is matched (step S18). The transmission is performed at the reception frequency of the communication partner while keeping the encoded ID in the trunked system communication (step S19), and the transmission process by the TA communication operation is performed (step S20). When communication with the other party is performed following the transmission processing in step S20 (step S21), the communication partner is notified that the communication by the repeater is not good, and the tone squelch circuit detects when a tone match is detected. It is opened and received and processing during communication is performed (step S22). If communication with the other party is not possible in step S21, a transition is made to a standby state based on the TA communication operation (step S23).

  According to the radio communication device 40 described above, the TA communication operation is automatically replaced with reference to the TA communication operation instruction. Therefore, the operation of the TA communication switch is not required, and the number of operations is reduced. In addition, if it is transmitted to the repeater and cannot be linked to the repeater, it will be trunked out, but if an instruction for TA communication operation is stored, the transmission / reception frequency of the wireless communication device can be matched to make a call with the communication partner. The communication partner is informed that the communication is not based on communication, and the other party knows that the communication is not via a repeater.

  The above TA communication operation instruction can also be applied to a phone call based on the PHS method. The operation in this case will be described based on the flowchart shown in FIG.

  As shown in FIG. 3, when the wireless communication device determines that PHS transmission has failed (step S30), a TA state is detected as to whether an instruction for TA communication operation has been issued (step S31). When it is determined in step S31 that the TA communication operation state has not been instructed, a standby state is entered following step S31 (step S32).

  If it is determined in step S31 that a TA communication operation instruction has been issued, a transmission code that can be received by the partner of the TA communication operation is set (step S33), and a transmission code that was used before step S30 and failed to communicate is set. Then (step S34), transmission processing by TA communication operation is performed (step S35).

  It is checked whether or not a call can be made with the other party by the transmission process in step S35 (step S36). If it is determined in step S36 that a call is in progress, the other party is notified of the inoperability of the calling base station (step S36). S37). If it is not determined in step S36 that the call is in progress, the standby state is set (step S38).

  Although there is a difference between commercial wireless communication (analog system) and PHS system (digital system), as described above, the TA communication operation can also be applied to the PHS system.

It is a block diagram which shows the structure of the radio | wireless communication apparatus concerning one Embodiment of this invention. It is a flowchart with which it uses for description of an effect | action of TA communication operation | movement at the time of trunked system communication operation | movement in the radio | wireless communication apparatus shown in FIG. It is a flowchart at the time of applying TA communication operation | movement concerning one Embodiment of this invention to a PHS system. It is a flowchart with which it uses for description of the effect | action of TA communication operation | movement at the time of the conventional trunked system communication operation | movement.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Microphone 2 Microphone amplifier 3 Modulator 4 and 14 Mixer 5 PLL frequency synthesizer 6 Microcomputer 7 External connector 8 Transmission signal amplifier 9 Transmission power amplifier 10 Antenna switch 11 Antenna 13 RF amplifier 15 Band pass filter 16 Intermediate frequency circuit 17 AF amplifier 18 Speaker 20 Transmitter 30 Receiver 40 Wireless communication device

Claims (1)

In a radio communication apparatus capable of selecting communication at the same frequency and communication using a frequency shifted by a predetermined frequency via a repeater when communication is performed with two or more radio communication apparatuses. A communication instruction by the talk-land function instructed by the communication instruction signal is stored in advance, and is stored when a predetermined number of consecutive transmission failures are detected during transmission by trunked system communication. Referring to the communication instruction by the talk-land function, when the communication instruction by the talk-land function is made as a result of this reference, the reception frequency is set to the transmission frequency of the communication partner and transmission processing is performed and communication with the other party is completed. A wireless communication device that notifies a communication partner that communication by a repeater is unsuccessful.

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