JP2007214776A - Digital radio communication device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital radio communication device being capable of easily recognizing a call connection and cutting no head of a call speech. <P>SOLUTION: The digital radio communication device has a receiving-signal processor, a transmitting-signal processor, and a changeover switch changing over the receiving-signal processor and the transmitting-signal processor. The digital radio communication device further has an in-processing information output means for outputting an in-processing information, and a control unit controlling the receiving-signal processor, the transmitting-signal processor, the changeover switch, and the in-processing information output means. The digital radio communication device is constituted so that the control unit controls the in-processing information output means to output the in-processing information, when the control unit transmits a transmission-right demand signal from the transmitting-signal processor. The digital radio communication device is further constituted so that the control unit controls the in-processing information output means, and stops the output of the in-processing information when the control unit detects a transmission-right acquiring signal from the receiving-signal processor. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a digital wireless communication apparatus, and more particularly to a press talk type digital wireless communication apparatus that performs communication by alternately switching between a transmission mode and a reception mode.

  A conventional digital radio communication system will be described with reference to FIG. A plurality of mobile stations (generally referred to as wireless devices) 403-1 and 403-2 in a communication area 405 (also referred to as a communication zone) of the control station 401 (also referred to as a control station) and the base station 402, 403-3,... 403-N and a system configured to perform a communication connection service between base stations or between mobile stations via the base stations. Note that the control station 401 may be installed in the vicinity of the base station 402, or may be installed in a place distant from the place. In this case, the control station 401 and the base station 402 are generally connected by a transmission line 404 such as a wired or micro line. In the following description, when the mobile stations 403-1, 403-2, 403-3,... 403-N are represented, they are referred to as mobile stations (or wireless devices) 403. Here, although described as a wireless device, the wireless device refers to a wireless device such as a wireless device, a portable wireless device, or an information terminal station mounted on a vehicle or the like.

  The control station 401 maintains and manages a communication connection and a service area between the base station 402 and the plurality of mobile stations 403 in the digital wireless communication system. The control station 401 is provided with a line control device, and performs a call control from a mobile station or a control for setting a communication route.

  Thus, the radio carrier frequency allocation permitted to be used in the digital radio communication system using the digital radio technology is the radio carrier f in the uplink direction, that is, the mobile station → base station direction, and f1 , F2, f3,... Also, in the downlink direction, that is, in the direction from the base station to the mobile station, multiple waves of F1, F2, F3,... Are recognized on the radio carrier F, for example, 9 MHz away from the uplink radio carrier. . Therefore, in the communication of the digital wireless communication system, the frequencies of the upstream direction f1, f2, f3,..., The downstream direction F1, F2, F3,. Each system can use one or a plurality of radio carriers according to the scale.

  Further, each wireless carrier is divided into frames as shown in FIG. 5, and the frame is further divided into four slots, and then a control channel C and a communication channel S are allocated to the slots. Here, one frame is 40 ms, for example, and one slot is 10 ms. The control channel C is a channel for performing connection control of a wireless line, and the communication channel S is a channel for performing a telephone call and data communication.

  Next, the mobile station used in the digital wireless communication system described above will be described as a press talk type mobile station. In the following description, the mobile station is described as a wireless device. Conventionally, in a press talk type wireless device, when the press switch attached to the wireless device main body is pressed, the wireless device is set to the transmission mode, and on the contrary, when receiving from the other party, the self switch is released by releasing the press switch. The wireless device is set to a reception mode and can only speak in one direction of transmission or reception. In this press talk type wireless device, when talking to the wireless device of the other party with the wireless device set to the transmission mode, the wireless communication device is supposed to talk with the press switch pressed.

  The operation of this wireless communication system will be described with reference to FIG. In FIG. 6, a case will be described where a call is made from a radio apparatus (same as a mobile station) 403-1 to a radio apparatus (same as a mobile station) 403-3 via a base station 402. In FIG. 6, two wireless devices are described, but the same applies to other wireless devices (mobile stations). First, the base station 402 periodically transmits an empty line signal, and the wireless device 403 located in the communication area 405 receives the empty line signal and is synchronized. A case where the wireless device 403-1 communicates with the wireless device 403-3 in this state will be described.

  First, in step 601, the wireless device 403-1 performs a call operation for calling on the wireless device 403-3. This dials the telephone number of the wireless device 403-3, for example, to call the other party. With this dial, a call signal is transmitted, for example, a connection request (transmission right request signal) to the base station 402 using the control channel C of one frame shown in FIG. 5 (step 602). When receiving the transmission right request signal, the base station 402 detects an empty slot among the slots of the communication channels S1, S2, and S3 in one frame (step 603). As a result of the detection, for example, if the slot S1 is an empty slot, the slot is allocated as a slot for a call between the wireless device 403-1 and the wireless device 403-3 (step 604). Then, the base station 402 transmits a calling signal using the control channel C to the wireless device 403-3 (step 605). When receiving a call signal from the base station 402, the wireless device 403-3 performs a call called operation (step 606) and transmits a response signal to the base station 402 (step 607). The base station 402 that has received the response signal transmits the response signal to the wireless device 403-1 (step 608). As a result, a call path for a call is formed using the empty slot S1, and the wireless device 403-1 receives a transmission right acquisition signal and a buzzer sound that informs that a call is possible (step 609). ). Since it is understood that the operator of the wireless device 403-1 can make a call by listening to this buzzer sound, pressing the press switch attached to the wireless device main body sets the wireless device to the transmission mode, A call is started (step 610).

  In the above description, it takes about several milliseconds, generally about 5 milliseconds, from the time when the operator of the wireless device 403-1 performs the calling operation of step 601 until the buzzer sound of step 609 sounds. If the operator presses the press switch and starts talking immediately before the talk is started, the beginning of the talk will be interrupted without being transmitted, resulting in a speech break. For example, I had said, "Hello" is, without being transmitted is "crowded" of the speech head, only "Nichiha" is a phenomenon that is sent. In the conventional analog radio system, such a problem does not occur because the digital radio communication system such as empty slot detection is not performed.

  However, many users who use digital wireless communication systems have migrated from analog wireless systems, and after pressing the send press button, it is customary to start talking immediately. The conversation starts before the buzzer sound is confirmed, and the beginning of the call voice is cut off and cannot be transmitted to the recipient. Therefore, realization of a digital wireless communication system that does not cause such talk disconnection is desired.

Japanese Patent Laid-Open No. 7-162937 JP 2005-198133 A

  Many users of digital wireless communication systems have migrated from analog wireless systems and have a habit of starting to send speech immediately after pressing the send press button. The beginning of the call voice cannot be transmitted to the recipient.

  An object of the present invention is to provide a digital wireless communication apparatus that can easily recognize that a call is being connected.

  Another object of the present invention is to provide a digital wireless communication apparatus in which the beginning part of a call voice is not cut off.

  The digital wireless communication apparatus of the present invention includes a reception signal processing unit, a transmission signal processing unit, a changeover switch for switching between the reception signal processing unit and the transmission signal processing unit, and a processing information output unit that outputs processing information. A control unit that controls the reception signal processing unit, the transmission signal processing unit, the changeover switch, and the processing information output unit, and the control unit transmits a transmission right request signal from the transmission signal processing unit. In this case, the control unit controls the in-process information output unit to output in-process information, and when the control unit detects a transmission right acquisition signal from the received signal processing unit, the control unit The middle information output means is controlled to stop outputting the in-process information.

  The digital wireless communication apparatus of the present invention further includes a speaker, and the in-process information output means includes a sound generator, and outputs the sound generator to the speaker based on the control of the controller. Configured to supply.

  The digital wireless communication apparatus of the present invention further comprises a display unit, wherein the processing information output means is composed of a character generation unit, and the output of the character generation unit is displayed on the basis of control of the control unit. Configured to be fed to the section.

  As described above, according to the present invention, it is possible to realize a digital wireless communication apparatus that can easily recognize a call start or a call connection. Also, the operator refrains from starting the call because the buzzer sound or tone is sounding, and when the buzzer sound or tone disappears, the call starts and the beginning of the transmitted voice cannot be transmitted to the receiver Disappear.

  The present invention will be described below with reference to FIGS. FIG. 1 is a block diagram of a schematic configuration of a radio apparatus (or mobile station). FIG. 2 is a block diagram showing a schematic configuration of the control station 101 and the base station 102. The digital radio communication system used in the present invention is substantially the same as the conventional digital radio communication system shown in FIG.

  FIG. 1 is a block diagram illustrating a schematic configuration of a wireless device (corresponding to the wireless device 403 illustrated in FIG. 4). The radio apparatus shown in FIG. 1 uses, for example, a pair wave of an uplink radio carrier f1 and a downlink radio carrier F1, and presses a press switch attached to the radio apparatus body to transmit its radio apparatus to a transmission mode. On the other hand, when receiving from the other party, the wireless device is set to the reception mode by releasing the press switch, and can only talk in one direction of transmission or reception.

  In FIG. 1, 101 is an antenna for performing transmission / reception with the base station 402, 102 is a selector switch for switching between a reception signal processing unit and a transmission signal processing unit, that is, a switching between a reception mode and a transmission mode, and 103 is , Received signal processing unit, 104, speaker, 105, control unit, 106, display unit, 107, operation unit, 108, microphone, 109, sound generation unit, 110, character generation unit, 111 The transmission signal processing unit.

  FIG. 2 is a block diagram illustrating a schematic configuration of the control station 401 and the base station 402. The control station 401 includes a processing device 201, a storage unit 202, a display unit 203, and an operation unit 204. The base station 402 includes a transmission radio 205 and a reception radio 206. In FIG. 2, the control station 401 and the base station 402 are shown coupled to each other via the transmission line 404, but the control station 401 and the base station 402 may be configured integrally.

  Here, the operation of the radio apparatus shown in FIG. 1 will be described. First, the operator operates the operation unit 107, for example, inputs the other party's mobile station number using the numeric keypad, and presses the call button. Since the transmission state is entered when the other party leaves, the audio signal input from the microphone 108 is converted into predetermined signal processing for transmission, predetermined modulation, and predetermined transmission frequency f1 by the transmission signal processing unit 111, and the changeover switch The signal is output from the antenna 101 via 102 and transmitted to the receiving radio 206 of the base station 402.

  On the other hand, a signal from the partner mobile station is received by the antenna 101 via the transmission radio 205 of the base station 402 and supplied to the reception signal processing unit 103 via the changeover switch 102. The reception signal processing unit 103 appropriately amplifies the high frequency, converts it to a predetermined intermediate frequency, further demodulates it, performs predetermined signal processing, and then outputs an audio signal from the speaker 104. In the case of data, the data is displayed on the display unit 107.

  Now, the operation of the above-described digital wireless communication system will be described with reference to FIG. In FIG. 3, it is assumed that wireless devices 301 and 302 are each configured by the wireless device shown in FIG. In FIG. 3, only two wireless devices are shown, but the same applies to other wireless devices. First, it is assumed that the base station 402 is transmitting a skyline signal and the wireless devices 301 and 302 in the communication area 405 are in a synchronized state. A case will be described in which the wireless device 301 makes a call with the wireless device 302 via the base station 402 in this state.

  In step 303, the wireless device 301 performs a call operation for calling on the wireless device 302. This is because, for example, an operator of the wireless device 301 dials the telephone number of the wireless device 302 by operating the operation unit 108 in order to call the other party. A call signal is generated by the control unit 105 by this dial, and the connection request (transmission right request signal) is transmitted to the base station 402 using the control channel C of one frame shown in FIG. ) Is transmitted (step 304). At this time, in the present invention, when the transmission right request signal is transmitted, the control unit 105 activates the sound generation unit 109 based on the transmission right request signal and starts sending the melody. That is, a melody for notifying that the call is being connected is sent to the speaker 104 (step 305). When the operator listens to this melody, it can be seen that a call is impossible, that is, the wireless device 302 is currently connected. This melody is not limited to the melody but may be sound information such as a buzzer or a beep. Of course, continuous sounds or intermittent sounds may be used.

  In addition to the melody sound as described above, the control unit 105 activates the character generation unit 110 based on the transmission right request signal and displays characters such as “Please wait for a while” or “Connecting”. By displaying on the screen, the operator can also confirm visually. It should be noted that the above-described information such as sounds and characters can be stored in advance in a ROM (Read Only Memory) or the like, and read out so that a speaker can be sounded or displayed on a display unit. Note that the above-described sound information and display information are collectively referred to as in-process information.

  The base station 402 that has received the transmission right request signal is the processing unit 201 of the control station 401, and based on this transmission right request signal, the base station 402 includes each of the slots of the communication channels S1, S2, and S3 in one frame shown in FIG. The presence / absence of an empty slot is detected (step 306). As a result of the presence / absence detection of an empty slot, for example, if the slot S1 is an empty slot, the slot S1 is assigned as a slot for a call between the wireless device 301 and the wireless device 302 (step 307). Then, the transmitting radio 205 of the base station 402 transmits a call signal to the radio apparatus 302 using the control channel S (step 308). When receiving a call signal from the base station 402, the wireless device 302 performs a call called operation (step 309) and transmits a response signal to the reception radio device 206 of the base station 402 if reception is possible (step 309). Step 310). Receiving the response signal, the base station 402 establishes the communication path in the control station 401 and transmits a response signal (transmission right acquisition signal) from the transmission radio 205 to the radio apparatus 301 (step 311). As a result, a call path for a call is formed using the empty slot S1. Then, when this response signal (transmission right acquisition signal) is detected by the control unit 105 via the reception signal processing unit 103, the control unit 105 starts from the sound generation unit 109 in step 303 based on this transmission right acquisition signal. Transmission of the melody sound that has started transmission is stopped (step 312). When the ringing of the melody sound stops, the operator of the wireless device 301 starts the call because it is understood that the call connection is ended and the call path is formed (step 313). Further, based on this response signal (transmission right acquisition signal), the control unit 105 controls the character generating unit 110 to display characters such as “Please wait for a while” or “Connecting” displayed on the display unit 106. Can be deleted, or a new “Please tell me” or the like can be displayed on the display unit 106. As a result, the operator can start a call by setting his / her wireless device 301 in the transmission mode by pressing a press switch attached to the main body of the wireless device 301.

  In the above-described embodiment, an embodiment in which notification is made with sound information or display is performed until the transmission right acquisition signal is received after the transmission right request signal is transmitted, so-called in-process information is output. However, for example, the microphone 108 is turned off by the transmission right request signal and the microphone 108 is turned on by the transmission right acquisition signal so that the sound from the microphone 108 is not supplied to the transmission signal processing unit 111. You can also. In this case, power consumption due to the connection of the microphone 108 can be reduced, and the battery life can be extended.

  As described above in detail, according to the present invention, when a transmission press button is pressed, a timbre that informs this is sounded during a period during which transmission is impossible or during a period during connection processing, Alternatively, by outputting warning information such as displaying characters, the point in time when the transmission is started is clarified, and a state in which the beginning portion of the transmission voice cannot be transmitted to the receiver, that is, so-called speech disconnection can be eliminated.

  Although the present invention has been described in detail above, the present invention is not limited to the embodiments of the digital wireless communication apparatus described herein, and can be widely applied to digital wireless communication apparatuses other than those described above. Needless to say.

The block diagram of schematic structure of one Example of this invention is shown. The block diagram of schematic structure of the control station and base station used by this invention is shown. It is a figure for demonstrating operation | movement of this invention. It is a figure for demonstrating an example of the conventional digital radio | wireless communications system. It is a figure for demonstrating the frame structure used with a digital radio | wireless communications system. It is a figure for demonstrating operation | movement of the conventional digital radio | wireless communication apparatus.

Explanation of symbols

101: antenna, 102: changeover switch, 103: received signal processing unit, 104: speaker, 105: control unit, 106: display unit, 107: operation unit, 108: microphone, 109: sound generation unit, 110: character generation unit , 111: transmission signal processing unit, 201: processing device, 202: storage unit, 203: display unit, 204: operation unit, 205: transmission radio, 206: reception radio, 401: control station, 402: base Station, 403: wireless device, 404: transmission path, and 405: communication area.

Claims (3)

  A reception signal processing unit, a transmission signal processing unit, a changeover switch for switching between the reception signal processing unit and the transmission signal processing unit, a processing information output means for outputting processing information, the reception signal processing unit, and the transmission A control unit that controls the signal processing unit, the changeover switch, and the processing-in-process information output unit. When the control unit transmits a transmission right request signal from the transmission signal processing unit, the control unit If the control unit detects the transmission right acquisition signal from the reception signal processing unit by controlling the medium information output unit and outputs the processing information, the control unit controls the processing information output unit to A digital wireless communication apparatus, wherein output of information being processed is stopped.   2. The digital wireless communication apparatus according to claim 1, further comprising a speaker, wherein the in-process information output means comprises a sound generator, and outputs the sound generator to the speaker based on control of the controller. A digital wireless communication device, characterized in that it is supplied. 2. The digital wireless communication apparatus according to claim 1, further comprising a display unit, wherein the processing information output means includes a character generation unit, and displays the output of the character generation unit based on control of the control unit. A digital wireless communication apparatus, characterized in that the digital wireless communication apparatus is supplied to

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