JP2007043481A - Radio communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve efficiency in communication in the radio communication system for transmitting data and voice data by radio from a transmission-side radio communication unit to a receiving-side radio communication unit. <P>SOLUTION: A large region and a small region are arranged at a slot which is transmitted between a transmission side and a receiving side. The transmission side detects whether there is voice data to be transmitted under a condition where data and voice data are transmitted simultaneously. If it is determined that there is voice data, a slot is formed where the voice data is stored in the large region and the data is stored in the small region. If no slot is determined, a slot is formed where the data is stored in the large region, and the slot formed is transmitted by radio to the receiving side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless communication system that wirelessly communicates voice data and data, and more particularly to a wireless communication system that improves communication efficiency.

For example, in a wireless communication system such as a mobile communication system, voice data and data are communicated wirelessly between a base station device and the mobile station device.
FIG. 4 shows a configuration example on the transmission side of a digital wireless communication unit that performs wireless communication processing.
On the transmission side in this example, the audio signal is encoded by the audio codec 31 and converted into audio data, and then transmitted to the processing unit 33. Further, the data is stored in the memory 32, and the processing unit 33 receives the audio codec. A slot is formed using the audio data from 31 and the data from the memory 32 and transmitted by radio.

FIG. 5 shows a configuration example of one slot.
One slot includes an area A1 for transmitting control data, an area A2 used for data transmission when audio data and data are transmitted simultaneously, and an area A3 for transmitting audio data or data. Has been.
In slotted digital wireless communication, as shown in FIG. 5, when audio data and data are transmitted simultaneously, the audio data is transmitted in the area A3 for transmitting audio data or data, and the data Are transmitted in the area A2 for simultaneously transmitting voice data and data.
Here, since it is necessary to maintain the reproducibility of the audio signal, the area A3 for transmitting the audio data or data needs to occupy a large portion in the slot. For this reason, the audio data and the data are simultaneously transmitted. The area A2 for transmission is small.

FIG. 6 shows an example of a time-series flow of the slot configuration when audio data and data are transmitted simultaneously.
As shown in the figure, regardless of the presence or absence of voice input, voice data is stored in the voice data or area A3 for transmitting data, and the data is stored in voice data and area A2 for transmitting data simultaneously. The For this reason, for example, when there is no voice input, a large area is unnecessarily occupied although there is substantially no effective voice data as in areas 42 and 44, and data is small as in areas 41 and 43. It will be transmitted in the area.

JP 2001-309437 A

As described above, in the conventional method as shown in FIG. 6, when audio data and data are transmitted simultaneously, the area A2 used for data transmission is always small, so the data transmission speed becomes low. There was a problem that data transmission took a long time. In addition, as described above, useless communication has occurred with respect to audio data, and overall communication is inefficient.
The present invention has been made in view of such a conventional situation, and an object of the present invention is to provide a wireless communication system capable of improving communication efficiency when wirelessly communicating voice data and data.

In order to achieve the above object, the wireless communication system according to the present invention wirelessly communicates voice data and data from a transmitting-side wireless communication device to a receiving-side wireless communication device with the following configuration.
That is, a large area and a small area are provided in a slot that communicates between the transmission-side wireless communication apparatus and the reception-side wireless communication apparatus.
In the wireless communication apparatus on the transmission side, in a state where audio data and data are transmitted simultaneously, the detecting means detects the presence or absence of audio data to be transmitted, and the slot forming means is to be transmitted by the detecting means If it is determined that there is audio data, the audio data to be transmitted is stored in the large area to form a slot in which the data to be transmitted is stored in the small area. If it is determined that there is no audio data, a slot is formed in which the data to be transmitted is stored in the large area. The wireless transmission means wirelessly transmits the slot formed by the slot forming means to the reception-side wireless communication apparatus.

Therefore, in a state where audio data and data are transmitted simultaneously, when there is audio data to be transmitted, audio data is stored in a large area in the slot and data is stored in a small area, and when there is no data to be transmitted. Since data is stored in a large area in the slot and communication is performed, for example, when there is no audio data to be transmitted temporarily when audio data and data are transmitted simultaneously, Communication efficiency can be increased, and overall communication efficiency can be improved.
As an example, when other data is transmitted at the same time as voice generated by a person is converted into data and transmitted in real time, the transmission speed of other data is increased by utilizing the time when the voice generated by the person is interrupted. As a whole, communication efficiency can be improved.

Here, various devices may be used as the wireless communication device on the transmission side and the wireless communication device on the reception side, for example, a base station device, a mobile station device, a fixedly installed child station device, etc. Can be used.
Further, as the wireless communication device on the transmission side, a device having a transmission function and a reception function may be used, or a device having a transmission function but not a reception function may be used.
In addition, as the wireless communication device on the reception side, a device having a transmission function and a reception function may be used, or a device having a reception function but not a transmission function may be used.

  Various data may be used as the data communicated simultaneously with the voice data. For example, data other than voice such as text and images is used. Also, for example, when an analog audio signal is input and digitized (encoded) to be communicated as audio data, it has already been digitized (encoded) as data communicated with the audio data. It is also possible to use existing audio data.

In addition, slots having various configurations may be used.
Further, as the large area included in the slot, for example, an area for transmitting audio data or data can be used.
Further, as the small area included in the slot, for example, an area used when audio data and data are transmitted simultaneously can be used.
In addition, as a large area and a small area, a larger area is used, for example, a larger number of constituent bits than a smaller area, and various sizes are used for each area. Also good.

In addition, as a state in which audio data and data are simultaneously transmitted, for example, a state in which a mode in which audio data and data are simultaneously transmitted is set by a person or a device is used. In such a state, for example, instead of always transmitting audio data regardless of the presence or absence of substantially effective audio data, priority is given to data transmission when there is no effective audio data, thereby improving communication efficiency. Can be achieved.
In addition, as a state of communication between the wireless communication device on the transmission side and the wireless communication device on the reception side, for example, a state in which voice data is transmitted or a state in which data is transmitted in addition to a state in which voice data and data are transmitted simultaneously Alternatively, a state in which nothing is transmitted may be switched and used, or only a state in which audio data and data are simultaneously transmitted may be used and the state may be always set.

  Further, various methods may be used as a method for detecting the presence or absence of audio data to be transmitted. For example, the level of the audio constituting the audio data to be transmitted is detected and the detected level is detected. If is greater than or equal to a predetermined threshold or exceeds a predetermined threshold, it is determined that there is audio data to be transmitted, while the detected level is less than the predetermined threshold or less than the predetermined threshold A method for determining that there is no audio data to be transmitted can be used.

The radio communication system according to the present invention has the following configuration as an example configuration.
That is, in the wireless communication apparatus on the transmission side, the slot forming unit forms a slot including information indicating the presence or absence of audio data based on the detection result by the detecting unit.
In the reception-side wireless communication device, the wireless reception means receives a slot wirelessly transmitted from the transmission-side wireless communication device, and the extraction means includes the voice included in the slot received by the wireless reception means. Based on the information indicating the presence / absence of data, they are included in the same slot or different slots received by the wireless reception means (that is, the same slot or different slot including the information indicating the presence / absence of the audio data). Both voice data and data or data (that is, both when voice data and data are received and both when data is received) are extracted.

  Therefore, in the state where voice data and data are simultaneously communicated, the presence / absence of voice data is notified from the transmission-side wireless communication device to the reception-side wireless communication device, and the reception-side wireless communication device is based on the content of the notification. When there is audio data, audio data is extracted from a large area in the received slot, data is extracted from a small area, and when there is no audio data, data is extracted from a large area in the received slot. Thus, audio data and data can be appropriately extracted from the slot transmitted from the transmission side.

Here, the information indicating the presence / absence of audio data may be included in the same slot as that containing audio data or data, or may be included in a different slot that does not contain audio data or data.
For example, a mode that includes information indicating that there is audio data in a slot that includes both audio data and data, and includes information indicating that there is no audio data in a slot that includes data but does not include audio data is used. In this case, on the receiving side, based on the information indicating the presence or absence of audio data included in the received slot, the status of the slot (whether both audio data and data are included, or audio data is not included) Is included).

Further, for example, it is possible to notify the status of other slots by information indicating the presence or absence of audio data included in a certain slot. As a specific example, the status of the next slot is notified by information indicating the presence or absence of audio data included in a certain slot, or the information indicating the presence or absence of audio data in a certain slot and information specifying other slots It is possible to notify the status of the other slot by including (for example, the slot number).
In addition, for example, it is possible to use a mode in which information indicating the presence / absence of audio data is notified from the transmission side to the reception side only when the presence / absence of audio data changes. In this case, the reception side confirms that there is no audio data. Switch to processing to extract data from a large area in the received slot in response to receiving information indicating, and then in the slot received in response to receiving information indicating that audio data is present The processing is switched to processing for extracting audio data from a large area and extracting data from a small area.

  As described above, according to the wireless communication system of the present invention, when audio data and data are transmitted simultaneously from the transmission side to the reception side, when there is audio data, a small area including the audio data in a large area in the slot In this case, communication is performed including data, and when there is no audio data, communication is performed including data in a large area in the slot, so that the data communication speed can be increased and communication efficiency can be improved.

An embodiment according to the present invention will be described with reference to the drawings.
FIGS. 1A and 1B show a configuration example of a digital communication processing unit of a wireless communication apparatus provided in a wireless communication system according to an embodiment of the present invention, and FIG. An example is shown, and (b) shows a configuration example on the receiving side.
In addition, as a radio | wireless communication apparatus, both the function of a transmission side and the function of a reception side may be provided, for example, or only either one may be provided.

As shown in FIG. 1A, the transmission side of this example includes an audio codec 1, a memory 2, and a processing unit 3.
An audio signal to be transmitted is input to the audio codec 1. For example, as a sound signal, a signal obtained by inputting sound emitted by a person through a microphone or the like can be used.
The audio codec 1 encodes the input audio signal, converts it into audio data, and outputs the audio data to the processing unit 3.
The audio codec 1 has a function of determining whether or not an audio signal is input, and outputs information indicating the determination result (audio input presence / absence determination result information) to the processing unit 3. As an example, the audio codec 1 determines that no audio signal is input when the level of the input audio signal is equal to or less than a predetermined threshold, and determines that there is an audio signal input in other cases.

The memory 2 stores data to be transmitted. As this data, for example, text or image data other than voice is used, but voice data that has already been encoded may be used. Further, this data may be preset in the memory 2, for example, or may be arbitrarily written, rewritten, or deleted from an external person or device.
For example, as the data, data of a message selected by a person or a device from a plurality of messages stored in the memory 2, data indicating a result detected by a predetermined detector, or imaging It is possible to use the data of the processed image.

The processing unit 3 forms a slot using the audio data input from the audio codec 1 or the data read from the memory 2 and transmits it wirelessly.
Further, when the audio data and the data are transmitted simultaneously, the processing unit 3 forms a slot based on the audio input presence / absence determination result information notified from the audio codec 1. In this case, the processing unit 3 includes the voice input presence / absence determination result information or information corresponding thereto (referred to as voice input presence / absence information in this example) in the slot in order to notify the receiving side.

A configuration example of a slot formed by the transmission side of this example is shown.
In this example, one slot includes, for example, an area A1 for transmitting control data, an area A2 used for transmitting audio data and data at the same time, as shown in FIG. It consists of an area A3 for transmitting data or data.
FIG. 2A shows an example of the configuration of slots when there is an audio input when audio data and data are transmitted simultaneously.
At this time, the processing unit 3 stores the audio data from the audio codec 1 in the area A3 for transmitting audio data or data, and the data from the memory 2 in the area A2 for transmitting audio data and data simultaneously. Store and configure slots. At this time, the processing unit 3 stores the voice input presence / absence information (here, information such as a flag indicating that there is voice input) in, for example, the control data area A1.

FIG. 2B shows an example of the slot configuration when voice data and data are transmitted simultaneously, for example, when there is no voice input temporarily.
At this time, the processing unit 3 does not set the audio data from the audio codec 1 as a transmission target, but stores the data from the memory 2 in the area A3 for transmitting the audio data or data, thereby forming a slot. At this time, the processing unit 3 stores voice input presence / absence information (here, information such as a flag indicating that there is no voice input) in, for example, the control data area A1.
As described above, when there is substantially no valid audio data, the large area A3 is used to transmit the data.

For example, when only one of the audio data or data is transmitted over a long time, the processing unit 3 places the transmission target (audio data or one of the data) in the area A3 for transmitting the audio data or data. A slot is formed with the area A2 for storing and transmitting audio data and data simultaneously empty.
In addition, the transmission side and the reception side use the control data included in the area A1 in the slot to notify the reception side of what slot configuration the transmission side is transmitting, and the reception side notifies the notification. Process the received slot based on

FIG. 3 shows an example of a time-series flow of the slot configuration when audio data and data are transmitted simultaneously.
As shown in the figure, when there is no voice input temporarily, a small area A2 for simultaneously transmitting voice data and data is made empty as areas 21 and 23, and a voice is sounded as areas 22 and 24. Data is stored in a large area A3 for transmitting data or data.
In this way, transmission is performed while changing the data storage area in accordance with the presence or absence of voice input.

As shown in FIG. 1B, the receiving side of this example includes a processing unit 11 and an audio codec 12.
The processing unit 11 receives a signal of a slot wirelessly transmitted from the transmission side, and extracts audio data and data included in the region A2 and the region A3 based on the control data included in the region A1 of the received slot. To do. For example, when audio data and data are transmitted simultaneously, the processing unit 11 extracts data from the area A2 and outputs audio from the area A3 when there is an audio input based on the audio input presence / absence information notified from the transmission side. Data is extracted, and data is extracted from the area A3 when there is no voice input.

The processing unit 11 outputs the extracted audio data to the audio codec 12.
The audio codec 12 converts the input audio data into the original audio signal.
For example, an audio signal obtained by the audio codec 12 is output as audio from a speaker or the like, and the data extracted by the processing unit 11 is displayed on a screen or stored in a memory.

  As described above, in the wireless communication system of this example, when performing slotted digital wireless communication, data is transmitted simultaneously with audio data or a large area A3 used for data transmission and audio data in one slot. In the configuration in which a small area A2 is provided, when transmitting voice data and data at the same time, the transmission side monitors the presence or absence of voice input while performing communication, and when voice input is present, Data is transmitted in a small area A2 for transmitting data, and when there is no voice input, data is transmitted in a large area A3 used for voice data or data transmission. Audio data and data are transmitted while switching modes.

Therefore, in the wireless communication system of this example, when voice data and data are transmitted simultaneously, if the voice data is temporarily interrupted, the data transmission speed can be increased, and the voice data and data are transmitted simultaneously. In this case, the average data transmission rate can be increased, and communication efficiency can be improved.
As an example, the wireless communication system of the present example is effective when applied to a system in which emergency communication such as emergency or fire fighting is performed. For example, voices such as instructions from ambulance teams, doctors, or fire brigade are input by a microphone on the transmission side and wirelessly transmitted as voice data to the reception side. At the same time, detection results of the patient's ECG, blood pressure, etc. When data such as images is acquired on the transmission side and wirelessly transmitted to the reception side, data can be transmitted quickly using the time when the audio data is interrupted, and emergency situations can be dealt with quickly. be able to.

Note that, in the wireless communication apparatus on the transmission side of this example, the detecting means is configured by the function of detecting the presence / absence of voice data by the voice codec 1, and the processing unit 3 determines whether voice data from the voice codec 1 or voice input is present. A slot forming unit is configured by a function of forming a slot based on the result information and data from the memory 2, and a wireless transmitting unit is configured by a function of wirelessly transmitting the slot by the processing unit 3.
Moreover, in the wireless communication device on the receiving side of this example, the wireless reception means is configured by the function of wirelessly receiving the slot by the processing unit 11, and the processing unit 11 receives the information based on the voice input presence / absence information from the transmitting side. The extraction means is constituted by the voice data contained in the slot and the function of extracting the data.

Below, the specific example of the radio | wireless communications system which can apply the radio | wireless communications system of this example demonstrated using FIGS. 1-3 is shown. The system to which the present invention can be applied is not limited to the system described here.
FIG. 7 shows an example of a digital mobile communication system that employs a time division multiplexing digital wireless communication system.
A communication connection service between the base station device 51 and a plurality of mobile station devices 61 and 62 existing in the communication area 52, or between different mobile station devices 61 and 62 that communicate via the base station device 51. A communication connection service is implemented.
Normally, a plurality of base station devices 51 are installed, and the plurality of base station devices are connected to the central station device and managed by the central station device.

As an example of a digital wireless system, a standard for a municipal digital mobile communication system is defined by the Association of Radio Industries and Businesses as ARIB STD (Association of Radio Industries and Businesses Standard).
FIG. 8 shows an example of radio carrier frequency allocation according to this standard.
In the uplink communication from the mobile station devices 61 and 62 to the base station device 51, frequencies such as f1, f2,... Are used, and in the downlink communication from the base station device 51 to the mobile station devices 61 and 62. Each frequency such as F1, F2,... Is used. Each system can use one or a plurality of radio carriers as control carriers and the rest as communication carriers according to the scale.

FIG. 9 shows a configuration example of a frame generated by dividing each wireless carrier.
The frame of this example is configured by being divided into four slots. These four slots are used as different channels (channels 1, 2, 3, 4), respectively. For example, a control channel for performing connection control of a wireless line and a communication channel for performing a call or data communication are allocated to this channel.
Note that a carrier including one or more control channels is referred to as a control carrier, and a carrier including only communication channels is referred to as a communication carrier.

Referring to FIGS. 10A, 10B, and 10C, the base station apparatus 51 and the mobile station apparatuses 61 and 62 communicate with each other by, for example, the press talk method using the communication wireless carrier as described above. The case of performing will be described.
FIG. 10A shows a configuration example of frames and channels in the case where communication is performed from the base station apparatus 51 to the mobile station apparatuses 61 and 62 using a downlink radio carrier.
FIG. 10B shows a configuration example of frames and channels in the case where communication is performed from the mobile station apparatuses 61 and 62 to the base station apparatus 51 using the uplink radio carrier.

FIG. 10C shows an example of transmission / reception timings in the mobile station apparatuses 61 and 62. RX indicates a reception period, TX indicates a transmission period, and I indicates an idle period.
In this example, a downlink signal is communicated from the base station apparatus 51 to the mobile station apparatuses 61 and 62 in the channel 1 (CH1) in the base station apparatus 51, and the mobile station apparatus in the channel 1 (CH1) in the mobile station apparatuses 61 and 62. Uplink signals from 61 and 62 to the base station apparatus 51 are communicated.
10A, 10B, and 10C, control operations such as establishment of a speech path and allocation of a use channel are completed, and a speech path between the base station apparatus 51 and the mobile station apparatuses 61 and 62 is established. Shows the case.

As a configuration example different from the above system, the same frequency is used for downlink communication from the base station device 51 to the mobile station devices 61 and 62 and uplink communication from the mobile station devices 61 and 62 to the base station device 51. A wireless carrier having the same may be used in common.
In these communications, for example, a plurality of types of data may be communicated such that voice data and data are communicated.

Next, configuration examples of the base station apparatus and the mobile station apparatus are shown.
FIG. 11 shows a configuration example of the base station apparatus 71 having a transmission / reception function.
The base station device 71 of this example includes an operation unit 81, a display unit 82, and a central processing unit 83. The central processing unit 83 includes a storage unit 91 and a slot allocation unit 92.
Further, the base station apparatus 71 of this example is connected to a radio 72 having an antenna 73 via a cable 74.
In this example, a configuration is shown in which the wireless device 72 is provided separately from the base station device 71, but the wireless device 72 may be provided integrally with the base station device 71.

The operation unit 81 is operated by a person to receive various instructions and information, and the display unit 82 displays information on the screen.
The central processing unit 83 is composed of, for example, a computer having a CPU (Central Processing Unit), and controls the entire digital mobile communication system such as a communication connection service between the base station apparatus 71 and the mobile station apparatus. The storage unit 91 is composed of a memory and stores various information, and the slot allocation unit 92 allocates slots.
The central processing unit 83 and the wireless device 72 transmit and receive communication signals via the cable 74. The wireless device 72 wirelessly transmits a signal from the base station device 71 to be transmitted from the antenna 73 to the mobile station device, and transmits the signal from the mobile station device received by the antenna 73 to the base station device 71. .

FIG. 12 shows a configuration example of a mobile station apparatus having a transmission / reception function.
The mobile station apparatus of this example includes an antenna 101, a switching unit 102, a receiving unit 103, a demodulating unit 104, a slot allocating unit 105, a modulating unit 106, a transmitting unit 107, a memory 108, and a key input unit. 109, an audio input unit 110, an audio output unit 111, and a display unit 112.

The antenna 101 transmits and receives radio signals, the switching unit 102 switches between transmission and reception by a switch, the reception unit 103 processes the reception signal, the demodulation unit 104 demodulates the reception signal, and the slot allocation unit 105 allocates slots. The modulation unit 106 modulates the transmission signal, and the transmission unit 107 processes the transmission signal.
The memory 108 stores various types of information, the key input unit 109 is operated by a person to receive various instructions and information, and the voice input unit 110 is configured by a microphone to input a voice uttered by the person. The output unit 111 includes a speaker and outputs sound, and the display unit 112 displays information on the screen.
The control unit 113 performs overall control in the mobile station apparatus.

  For example, when the mobile station apparatus is set to the reception state, a person switches a press talk switch (not shown) to the reception side. As a result, the received signal from the base station apparatus is demodulated via the antenna 101, the switching unit 102, the receiving unit 103, and the demodulating unit 104. Based on the demodulated signal, slot allocating section 105 delivers the output according to the slot (channel) transmitted from the base station apparatus to control section 113. The control unit 113 operates the mobile station apparatus as a receiver by switching the press talk switch to the receiving side. Further, the control unit 113 controls the entire mobile station apparatus in accordance with an instruction from the key input unit 109 and a control program stored in the memory 108. Further, the control unit 113 displays the demodulated data on the display unit 112 and outputs the demodulated audio signal from the audio output unit 111 with respect to the demodulation result of the demodulation unit 104.

  When the mobile station apparatus is set to the transmission state, a person switches a press talk switch (not shown) to the transmission side. Thereby, the control part 113 operates a mobile station apparatus as a transmitter. The control unit 113 delivers the voice data input from the voice input unit 110, the data input from the key input unit 109, and the data stored in the memory 108 to the slot allocation unit 105. The slot allocation unit 105 stores the audio data and data delivered from the control unit 113 in a predetermined slot area and delivers the data to the modulation unit 106. The signal of this slot is modulated by the modulation unit 106 and is wirelessly transmitted from the antenna 101 to the base station device via the transmission unit 107 and the switching unit 102.

Here, the configurations of the wireless communication system and each device according to the present invention are not necessarily limited to those described above, and various configurations may be used. The present invention can also be provided as, for example, a method or method for executing the processing according to the present invention, a program for realizing such a method or method, or a recording medium for recording the program. It is also possible to provide various devices and systems.
The application field of the present invention is not necessarily limited to the above-described fields, and the present invention can be applied to various fields.
In addition, as various processes performed in the wireless communication system and each device according to the present invention, for example, a processor executes a control program stored in a ROM (Read Only Memory) in hardware resources including a processor and a memory. The configuration controlled by doing so may be used, and for example, each functional means for executing the processing may be configured as an independent hardware circuit.
The present invention can also be understood as a computer-readable recording medium such as a floppy (registered trademark) disk or a CD (Compact Disc) -ROM storing the control program, and the program (itself). The processing according to the present invention can be performed by inputting the program from the recording medium to the computer and causing the processor to execute the program.

It is a figure which shows the structural example of the digital radio | wireless communication part which concerns on one Example of this invention, (a) is a figure which shows the structural example of a transmission side, (b) is a figure which shows the structural example of a receiving side. . (A) is a figure which shows the structural example of the slot when there exists audio | voice input, (b) is a figure which shows the structural example of the slot when there is no audio | voice input. It is a figure which shows an example of the time-sequential flow of a slot structure. It is a figure which shows the structural example of the transmission side of a digital radio | wireless communication part. It is a figure which shows the structural example of a slot. It is a figure which shows an example of the time-sequential flow of a slot structure. It is a figure which shows an example of a digital mobile communication system. It is a figure which shows an example of the frequency allocation of a radio carrier. It is a figure which shows the structural example of a flame | frame. (A), (b), (c) is a figure which shows an example of communication with a base station apparatus and a mobile station apparatus. It is a figure which shows the structural example of a base station apparatus. It is a figure which shows the structural example of a mobile station apparatus.

Explanation of symbols

  1, 12, 31 ... Voice codec, 2, 32, 108 ... Memory, 3, 11, 33 ... Processing unit, 21-24, 41-44, A1-A3 ... Area, 51, 71 ... Base Station device, 52 ... Communication area, 61, 62 ... Mobile station device, 72 ... Radio equipment, 73, 101 ... Antenna, 74 ... Cable, 81 ... Operation part, 82, 112 ... Display part, 83 ··· Central processing unit, 91 ··· Storage unit, 92, 105 ·· Slot assignment unit, ··· Switching unit, ················································· , 109 ·· Key input unit, 110 · · Voice input unit, 111 · · Voice output unit,

Claims (2)

In a wireless communication system that wirelessly communicates voice data and data from a wireless communication device on the transmission side to a wireless communication device on the reception side,
The slot communicated between the transmitting-side wireless communication device and the receiving-side wireless communication device is provided with a large region and a small region,
The wireless communication device on the transmission side includes detection means for detecting the presence or absence of audio data to be transmitted in a state where audio data and data are simultaneously transmitted;
In the state where the audio data and the data are transmitted simultaneously, if the detection means determines that there is audio data to be transmitted, the audio data to be transmitted is stored in the large area and the data to be transmitted Slot forming means for forming a slot for storing data to be transmitted in the large area when the detection means determines that there is no audio data to be transmitted. When,
Wireless transmission means for wirelessly transmitting the slot formed by the slot forming means to the wireless communication device on the receiving side,
A wireless communication system. The wireless communication system according to claim 1, wherein
In the wireless communication device on the transmission side, the slot forming unit forms a slot including information indicating the presence or absence of audio data based on a detection result by the detecting unit,
The reception-side wireless communication device includes a wireless reception unit that receives a slot wirelessly transmitted from the transmission-side wireless communication device;
Based on the information indicating the presence / absence of the audio data included in the slot received by the wireless reception means, both the audio data and the data included in the same slot or different slots received by the wireless reception means or the data Extraction means for extracting,
A wireless communication system.

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