JP2000295657A - Radio communication system, base station device and radio communication terminal used in this radio communication system - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable communication and data communication on the same frequency, thereby effectively utilizing wireless resources. A base station apparatus includes a terminal state determination unit.
It is determined whether the terminal device is in a call or in a data communication. When a call is in progress, the frequency detection unit 307 detects the frequency of the channel used in the call, and when in data communication, the frequency detection unit 307 detects the frequency of the channel used in the data communication. I do. And
A channel for data communication is set with the terminal device using the frequency at the time of communication through the wireless control unit 301, or a channel for data communication is set up with the terminal device using the frequency at the time of data communication. Set. This allows the terminal device to perform data communication or telephone conversation via the base station device 102 without switching the frequency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a PHS (Pe
rsonal Handy-phone System) and wireless communication of voice and data between a base station apparatus connected to a communication apparatus having a voice communication function and a data communication function via a wired network. The present invention relates to a wireless communication system, a base station device and a wireless communication terminal used in the wireless communication system.

[0002]

2. Description of the Related Art In recent years, digital mobile communication systems typified by cellular telephone systems and PHS have rapidly become widespread. In this type of system, in addition to a voice call service, provision of a wireless data communication service using a personal computer connected to a mobile phone or a portable information terminal having a wireless communication function has been started.

Here, assuming a wireless communication system capable of performing data communication and voice communication as shown in FIG. 1, a conventional sequence of data communication and voice communication will be described.

FIG. 10 is a block diagram showing a configuration of a control function of a conventional wireless terminal device used in the wireless communication system.

[0005] The wireless terminal device 101 has a data communication interface 70 as a component for performing data communication.
1 and a data communication control unit 702, a call interface unit 703 and a call control unit 704, which are components for performing a voice call, and a call or data communication between the base station apparatus 102 and a wireless network. A wireless control unit 705 for transmitting and receiving information is provided.

FIG. 11 is a block diagram showing a configuration of a control function of a conventional wireless terminal device used in the wireless communication system.

[0007] The base station device 102 includes the radio terminal device 10.
1 and a wireless communication control unit 801 for transmitting and receiving information for a call or data communication via a wireless network, and a data communication control unit 802 which is a constituent element for performing data communication.
And a wire control unit (A) 803, and a call control unit 804 and a wire control unit (B), which are constituent elements for making a voice call.
805 are provided.

In such a configuration, voice communication and data communication have conventionally been performed in the following procedure.

(A) Voice call FIG. 12 is a diagram showing an example of a call connection sequence of a conventional voice call.

[0010] From the wireless terminal device 101 to the voice communication device 10
In the case of making a call and making a voice call to the user,
, A call connection operation to the voice communication device 104 is performed. When this operation is performed on the call interface unit 703, the call control unit 704 of the wireless terminal device 101 controls the wireless control unit 705 to perform a call connection process with the voice communication device 104 via the base station device 102. Do.

Here, prior to the call connection processing, the wireless control unit 705 of the wireless terminal 101 first
2 is requested to allocate a communication channel used for a call (901). The radio control unit 801 of the base station device 102
When this link channel establishment request is received, a channel for communication is secured (902), and the link channel assignment is transmitted to the wireless control unit 705 of the wireless terminal device 101 (90).
3). Thereafter, the wireless terminal device 101 and the base station device 10
The second wireless control units 705 and 801 perform call connection processing (9
04) In synchronization with this, the call control unit 804 of the base station device 102 controls the wired control unit (B) 805 to perform a call connection process with the voice communication device 104 (905). Thus, after the call connection processing in the wireless section and the wired section is completed, a voice call can be made between the wireless terminal apparatus 101 and the voice communication apparatus 104 via the base station apparatus 102 (906).

(B) Data Communication When performing data communication between the wireless terminal apparatus 101 and the data communication apparatus 103, a method of occupying a communication channel in a wireless section (FIG. 13) Apparatus 10
1 and sharing the communication channel (FIG. 14, FIG. 1)
5).

FIG. 13 is a diagram showing a channel occupancy type data communication as a first example of a conventional data communication start sequence.

In the method of occupying the communication channel in the wireless section, the user operates the data communication interface unit 701 of the wireless terminal device 101 to connect to the data communication device 104. Data communication interface unit 70
1 is performed, the wireless terminal device 101
The data communication control unit 702 controls the wireless control unit 705 to transmit the data communication device 103 via the base station device 102.
Perform connection processing with.

Here, prior to the connection processing, the radio control unit 705 of the radio terminal apparatus 101 firstly sets the base station apparatus 102
Request for the assignment of a communication channel used for data communication (1001). Radio control unit 80 of base station apparatus 102
1 receives the link channel establishment request, secures a channel for data communication (1002), and transmits the link channel assignment to the wireless control unit 705 of the wireless terminal device 101 (1003). Thereafter, the wireless control units 705 and 801 of the wireless terminal device 101 and the base station device 102 perform call connection processing (1004), and in synchronization with this, the data communication control unit 802 of the base station device 102 sets the wired control unit ( A)
803 is controlled to perform a connection process with the data communication device 104 (1005).

This connection processing is a call connection processing when the wired network A is circuit-switched, an SVC is opened when packet-switched, and may not be explicitly performed when a packet-switched PVC is used. . In this way, after the call connection processing in the wireless section and the connection processing in the wired section are completed, data communication can be started between the wireless terminal apparatus 101 and the data communication apparatus 103 via the base station apparatus 102 ( 1006).

On the other hand, in the method in which a communication channel in a wireless section is shared by a plurality of wireless terminal devices 101, when a user attempts to start data communication and the communication channel is not set (FIG. 14), There is a case where a communication channel is set (FIG. 15).

FIG. 14 is a diagram showing a conventional data communication start sequence example 2 when a channel is not set in shared channel data communication. FIG. 15 is a diagram illustrating, as a conventional data communication start sequence example 3, a case where a channel has been set in shared channel data communication.

When the communication channel is not set, as shown in FIG. 14, the wireless terminal apparatus 101 uses the same procedure as in the case of performing data communication while occupying the communication channel, and 102, a channel for data communication is allocated (1101 to 1103).

On the other hand, when a communication channel is set, as shown in FIG. 15, when a user attempts to start data communication, there is a user (terminal) already performing data communication. (1107) Since the data communication is started using the common communication channel, it is not necessary for the base station apparatus 102 to allocate the communication channel used for the data communication. What is necessary is just to receive from the station device 102. This information is notified to the wireless terminal device 101 by, for example, notifying from the base station device 102.

Thereafter, the wireless control units 705 and 801 of the wireless terminal device 101 and the base station device 102 perform data communication start processing (1104), and in synchronization with this, the data communication control unit 802 of the base station device 102 Wired control unit (A)
803 is controlled to perform connection processing with the data communication device 104 (1105). In this data communication start process, subscriber authentication of the wireless terminal device 101, registration of data communication with the base station device 102 and a connection request to the data communication device are performed by the wireless terminal device 101. This is the same processing as the exclusive type. In this way, after the data communication start processing in the wireless section and the connection processing in the wired section are completed, the wireless terminal apparatus 101 and the data communication apparatus 10
3 can start data communication via the base station apparatus 102 (1106).

Incidentally, in a conventional wireless communication system,
For example, when data communication is started during a voice call, or when an attempt is made to start a voice call during a data communication, a communication channel for voice communication and a communication channel for data communication are transmitted from the base station apparatus 102 to the wireless terminal apparatus 101. And different frequencies were assigned. In this case, in order to perform voice communication and data communication using two communication channels having different frequencies on the wireless terminal device 101 side, two wireless units or two synthesizers are mounted, or an expensive high-speed synthesizer is mounted. Then, the frequency of the communication channel must be switched for each time slot.

[0023]

As described above, in the conventional wireless communication system, when a terminal device starts data communication during a voice call, or when a voice call starts during a data communication, a communication channel is used. And the data communication channel are assigned different frequencies. Therefore, on the terminal side, it is necessary to switch the frequency to be transmitted and received according to the timing of each slot used for voice communication and data communication, and to achieve this, implement a plurality of wireless units or synthesizers in the terminal, Alternatively, a high-speed synthesizer was required, which was one of the factors that hindered cost reduction and weight reduction.

Further, in such a configuration in which communication and data communication are performed at different frequencies, since each terminal uses a plurality of frequencies, there is a problem from the viewpoint of effective use of frequencies.

The present invention has been made in view of the above points, and enables a call and data communication using the same frequency.
It is an object of the present invention to provide a wireless communication system capable of effectively utilizing wireless resources, a base station apparatus and a wireless communication terminal used in the wireless communication system.

[0026]

SUMMARY OF THE INVENTION The present invention relates to a radio communication system comprising at least one base station device constituting a radio area and a radio communication terminal connected to the base station device via a radio network. A terminal status determining means for determining whether or not the wireless communication terminal is engaged in a call to the base station apparatus; Frequency detecting means for detecting the frequency of the channel being performed, between the wireless communication terminal using the frequency detected by the frequency detection means when the wireless communication terminal starts data communication during a call Channel setting means for setting a channel for data communication, wherein the wireless communication terminal transmits information for voice communication and information for data communication with the base station apparatus to the same frequency. A wireless control means for transmitting and receiving in one in which the wireless control unit has to be provided and information separating means for separating the information received to for data communication for voice communications.

According to such a configuration, when the wireless communication terminal starts data communication during a call, the base station detects the frequency of the channel at the time of the call, and uses the frequency for the channel for data communication. Is set.
Therefore, the wireless communication terminal can perform data communication with the base station without switching the frequency. In this case, the information for voice communication and the information for data communication are transmitted and received at the same frequency, so that the wireless communication terminal separates and processes the information for voice communication and data communication according to the time slot. Become.

When the wireless communication terminal starts a call during data communication, the base station apparatus determines that the wireless communication terminal is performing data communication, and determines the channel used in the data communication. By detecting the frequency of and setting a channel for communication using this detected frequency,
On the wireless communication terminal side, a call can be made with the base station device without switching the frequency.

In a wireless communication system in which a plurality of wireless communication terminals share a wireless network, when a wireless communication terminal starts data communication during a call, the wireless communication terminal is busy on the base station apparatus side. When it is determined, determine whether or not another wireless communication terminal is performing data communication,
If another wireless communication terminal is performing data communication,
By detecting the frequency of the channel used in the data communication and setting a channel for data communication using the detected frequency, the wireless communication terminal side can communicate with the base station device without switching the frequency. Data communication can be performed between them.

[0030]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a configuration of a wireless communication system which enables data communication and voice communication according to the present invention.

In the figure, 101 is a wireless terminal device such as a PHS, and 102 is a base station device arranged in each area. The base station apparatuses 102 are geographically dispersed in a service area covered by the system, and one or more base station apparatuses form a wireless area. Wireless terminal device 101
Are connected via a radio line in a cell formed by the base station apparatus 102. As a wireless access scheme between the wireless terminal apparatus 101 and the base station apparatus 102, for example, TDMA-TDD (Time Division Multiple Acces
(s-Time Division Duplex) system is used. The wireless terminal device 101 includes a mobile information terminal having a data communication function and a wireless access function in addition to a mobile phone having only a call function, and a personal computer P
C is connected.

Reference numeral 103 denotes a data communication device connected to the base station device 102 via the wired network A, and reference numeral 104 denotes a base station device 1
02 is a voice communication device connected to a wired network B. The data communication device 103 and the voice communication device 104 are communication partners of the wireless terminal device 101, and are separately shown here to distinguish between data communication and voice communication.
It may be configured as one device. The wired network A is for data communication, the wired network B is for voice communication, and is connected to a public line network or X.25. SVC (SwitchingVirtual C
A dedicated line network such as ircuit) is used.

In such a wireless communication system, the wireless terminal device and the base station device of the present invention are configured as follows.

FIG. 2 is a block diagram showing the configuration of the wireless terminal device of the present invention.

The radio terminal 101 includes a radio unit 1 having an antenna 11, a modem unit 2, a TDMA unit 3, a communication unit 4, a control unit 5, an information storage unit 6, and a data communication unit 7.
And a display unit 8 and a key input unit 9.

That is, the radio carrier signal arriving from the base station apparatus 102 is received by the antenna 11 and then received by the receiving section 13 via the high-frequency switch (SW) 12 of the radio section 1.
Is input to In the receiving unit 13, the received radio carrier signal is mixed with the local oscillation signal generated from the synthesizer 14 and down-converted into a received intermediate frequency signal. The local oscillation signal frequency generated from the synthesizer 14 is set to a value corresponding to the radio channel frequency according to an instruction from the control unit 5. Further, the radio unit 1 is provided with a reception field strength detection unit (RSSI) 16. The reception electric field strength detection section 16 detects the reception electric field strength of the wireless carrier signal arriving from the base station apparatus 102, and notifies the control section 5 of the detected value, for example, for determining and displaying the reception quality.

The received intermediate frequency signal output from the receiving section 13 is input to the demodulating section 21 of the modem section 2. The demodulation section 21 digitally demodulates the received intermediate frequency signal, thereby reproducing the digital demodulated signal.

TDMA decoding section 31 of TDMA section 3
Separates the digital demodulated signal for each reception time slot. If the data of the separated slot is audio data, the audio data is transmitted to the interface unit 4.
To enter. On the other hand, if the data of the separated slot is packet data or control data, these data are input to the data communication unit 7.

The communication unit 4 has an ADPCM (Adaptive Diffe
rential Pulse Code Modulation) Transcoder 41
, A PCM codec 42, a speaker 43, and a microphone 44. The ADPCM transcoder 41 decodes the audio data output from the TDMA decoding unit 31. The PCM codec 42 uses the A
The digital audio signal output from the DPCM transcoder 41 is converted into an analog signal, and this audio signal is output from the speaker 43 as loudspeaker.

The data communication section 7 receives the data supplied from the TDMA decoding section 31 and supplies the data to the control section 5. If the received data is control data, the control unit 5 analyzes the control data and performs necessary control.
On the other hand, if the received data is packet data arriving from a server or the like, the packet data is depacketized, stored in the information storage unit 6, and supplied to the display unit 8 including, for example, a liquid crystal display (LCD). Display.

On the other hand, the user's voice signal input to the microphone 44 is PCM-coded by the PCM codec 42 and then compression-coded by the ADPCM transcoder 41. Then, the encoded audio data is TDM
It is input to the A encoding unit 32. The control data and packet data output from the control unit 5 are input to the TDMA encoding unit 32 via the data communication unit 7.

[0043] The TDMA encoding unit 32 uses the ADP
The digital audio data of each channel output from the CM transcoder 41 and the control data and packet data output from the data communication unit 7 are inserted into a transmission time slot designated by the control unit 5 and multiplexed. The modulation unit 22 digitally modulates the transmission intermediate frequency signal with the multiplexed digital communication signal output from the TDMA encoding unit 32, and inputs the modulated transmission intermediate frequency signal to the transmission unit 15.

The transmitting section 15 mixes the modulated transmission intermediate frequency signal with the local oscillation signal generated from the synthesizer 14, upconverts the mixed signal into a radio carrier frequency, and further amplifies the signal to a predetermined transmission power level. The wireless carrier signal output from the transmitting unit 15 is transmitted from the antenna 11 to the base station device 102 via the high frequency switch 12.

FIG. 3 is a block diagram showing the configuration of the base station apparatus according to the present invention.

Base station apparatus 102 includes radio section 10 having antenna 111, modem section 20 and TDMA section 30.
, An interface unit 40, a control unit 50, an information storage unit 60, and a data communication unit 70.

That is, after the radio carrier signal arriving from the radio terminal device 101 is received by the antenna 111,
The signal is input to the receiving unit 113 via the high frequency switch (SW) 112 of the wireless unit 10. In the receiving section 113, the received radio carrier signal is mixed with a local oscillation signal generated from the synthesizer 114 and down-converted into a received intermediate frequency signal. The frequency of the local oscillation signal generated from the synthesizer 114 is instructed by the control unit 50 according to the radio channel frequency. Also, the radio unit 10 includes a reception field strength detection unit (RSSI) 1
16 are provided. This reception electric field strength detection section 116
Then, the received electric field strength of the wireless carrier signal arriving from the wireless terminal device 101 is detected, and the detected value is notified to the control unit 50 for searching for an empty channel, controlling the handover of the mobile terminal device, and the like.

The received intermediate frequency signal output from the receiving section 113 is input to the demodulation section 221 of the modem section 20. The demodulation unit 221 performs digital demodulation of the received intermediate frequency signal, thereby reproducing a digital demodulated signal.

TDMA decoding section 33 of TDMA section 30
1 separates the digital demodulated signal for each reception time slot. If the data of the separated slot is audio data, the audio data is input to the interface unit 40. On the other hand, if the data of the separated slot is packet data or control data, these data are input to the data communication unit 70.

The interface unit 40 has an ADPCM (Ad
aptive Differential Pulse Code Modulation) transcoder 441, public line interface 442,
And a dedicated line interface 443.

The ADPCM transcoder 441 decodes the audio data output from the TDMA decoding section 331. The decoded digital audio signal is transmitted from the public line interface 442 to an I 'interface network (hereinafter referred to as an I' network). The I 'network is P
It is for accommodating HS base stations and constitutes a public network composed of a circuit switching network together with an integrated services digital network (ISDN). Many wired terminal devices are connected to the public network. The public line interface 442 performs a call connection process for the I 'network according to an instruction from the control unit 50. The leased line interface 443 performs processing for opening a connection for packet communication to the leased line network, etc., in accordance with an instruction from the control unit 50. The leased line network constitutes a packet network. The packet exchange is performed according to the protocol specified in 25.

The data communication unit 70 is provided for the wireless terminal device 101
If the data arrived from is the control data addressed to the own station, the control data is input to the control unit 50. The control unit 50
Based on this control data, processing for establishing a connection for packet communication, which will be described later, is performed. On the other hand, the wireless terminal device 1
If the data arrived from 01 is packet data addressed to the outside, the data communication unit 70 sends the packet data to the leased line network via the leased line interface 443.

On the other hand, a digital communication signal arriving from the I 'network is received by the public line interface 442.
If the digital communication signal is audio data, the digital communication signal is subjected to compression encoding processing by the ADPCM transcoder 441 and is input to the TDMA encoding unit 332.
On the other hand, if the digital communication signal is control data, it is input to the data communication unit 70. Further, packet data arriving from the leased line network is input to the data communication unit 70 via the leased line interface 443.

If the destination of the input data is wireless terminal device 101, data communication unit 70
Input to MA encoding section 332. On the other hand, if the input data is control data addressed to the own station, the control data is input to the control unit 50. The control unit 50 analyzes the input control data and performs various controls. Also,
The control unit 50 transmits control data addressed to the wireless terminal device 101 to
The TDMA encoding unit 3 via the data communication unit 70
32.

The TDMA encoding unit 332 converts the AD
The digital voice data of each channel output from the PCM transcoder 441 and the control data and packet data output from the data communication unit 70 are inserted into the transmission time slot designated by the control unit 50 and multiplexed. The modulation section 222 digitally modulates the transmission intermediate frequency signal with the multiplexed digital communication signal output from the TDMA encoding section 332, and inputs the modulated transmission intermediate frequency signal to the transmission section 115.

The transmitting section 115 mixes the modulated transmission intermediate frequency signal with the local oscillation signal generated from the synthesizer 114, up-converts the signal into a radio carrier frequency, and further amplifies the signal to a predetermined transmission power level. The wireless carrier signal output from transmitting section 115 is transmitted from antenna 111 to wireless terminal apparatus 101 via high-frequency switch 112.

Next, a functional configuration for realizing data communication and voice communication according to the present invention will be described.

FIG. 4 is a block diagram showing the configuration of the control function of the wireless terminal device of the present invention used in the above wireless communication system.

As a control function according to the present invention, the wireless terminal device 101 is a component for performing voice communication with the data communication interface 201 and the data communication control unit 202 which are components for performing data communication. A wireless control unit 205 for transmitting and receiving information for a call or data communication between the call interface unit 203 and the call control unit 204 and the base station apparatus 102 via a wireless network.
, An information separating unit 206 is provided. These functional units show the control functions of the control unit 5 shown in FIG. 2, and the control unit 5 is configured with, for example, a microcomputer as a main control unit.

The configuration of FIG. 4 differs from the conventional configuration (FIG. 10) in that an information separating unit 206 is provided. In the present invention, since the same frequency is used for data communication and voice communication, the information separating unit 206 separates information transmitted and received by the wireless control unit 205 into communication information and data communication information according to time slots. Are separated.

FIG. 5 is a block diagram showing a configuration of a control function of the base station apparatus of the present invention used in the above-mentioned radio communication system.

The base station device 102 includes the radio terminal device 10
1, a wireless control unit 301 for transmitting and receiving data or voice via a wireless network, a data communication control unit 302 and a wired control unit (A) 303 which are components for performing data communication, A call control unit 304 and a wired control unit (B) 305, which are components for making a call, a terminal state determination unit 306, a frequency detection unit 307, and a data communication determination unit 308 are provided. These functional units show the control functions of the control unit 50 shown in FIG.
The control unit 50 is configured with, for example, a microcomputer as a main control unit.

The configuration of FIG. 5 is different from the conventional configuration (FIG. 11) in that the terminal state determination unit 306, the frequency detection unit 307,
That is, a data communication determination unit 308 is provided.
The terminal state determination unit 306 determines whether the wireless terminal device 101 is in a call or in a data communication. The frequency detecting unit 307 detects the frequency of the channel used for the call when the wireless terminal device 101 is in a call according to the determination result of the terminal state determination unit 306, and detects the data when the wireless terminal device 101 is in the data communication. Detects the frequency of the channel used for communication. When a plurality of terminals share a wireless network, the data communication determination unit 308 determines whether another wireless terminal device is performing data communication.

In such a configuration, according to the present invention, voice communication and data communication are performed in the following procedure. Here, (a) a process when the wireless terminal device 101 that is performing a voice call with the voice communication device 104 starts data communication, and (b) a wireless terminal device 101 that performs a data communication with the data communication device 103 Will be described separately for a case where a voice call is started.

(A) In the case of starting data communication during a call When the wireless terminal device 101 that is performing a voice call with the voice communication device 104 starts data communication, it occupies a communication channel in a wireless section. There are a method (FIG. 6) and a method (FIGS. 7 and 8) in which a plurality of wireless terminal apparatuses 101 perform communication by sharing a communication channel.

FIG. 6 is a diagram showing a channel occupancy type data communication sequence as a first example of a data communication start sequence during a call according to the present invention. It should be noted that the broken lines in the figure indicate processing relating to voice calls.

In the method in which the communication channel is occupied, the user performs an operation for connecting to the data communication device 103 to the data communication interface unit 201 of the wireless terminal device 101 during a voice call (401). This connection operation may be performed via a data communication device (such as a PC) connected to the wireless terminal device 101 in some cases. When this operation is performed on the data communication interface unit 201, the data communication control unit 202 of the wireless terminal device 101 sets the wireless control unit 2
05 to perform a connection process with the data communication device 103 via the base station device 102.

Here, prior to the connection processing, the radio control section 205 of the radio terminal apparatus 101 firstly sets the base station apparatus 102
Is requested to allocate a communication channel used for data communication (402). Radio control section 301 of base station apparatus 102
Receives a link channel establishment request, the terminal state determination unit 306 determines whether or not the wireless terminal apparatus 101 that is starting data communication is busy. When the wireless terminal device 101 is not in a call, the same process as in the related art is performed to allocate a channel for data communication.

On the other hand, when the wireless terminal device 101 is in a call, the frequency detecting unit 307 detects the frequency of the communication channel used by the wireless terminal device 101 for the voice call (403). Upon detecting the frequency of a communication channel during a voice call, the wireless control unit 301 determines a link channel assignment instructing the use of the frequency by the wireless terminal apparatus 101.
(404). After transmitting the link channel assignment, a call connection process between the wireless terminal device 101 and the base station device 102 (405), the base station device 10
The connection process (406) between the two-data communication device 103 can be performed in a time-division manner.

Here, in radio terminal apparatus 101, information separation section 206 separates the information received by radio control section 205 for voice communication and data communication according to a time slot. In this case, if the information is for voice communication, the user is notified via the communication interface unit 203, and if the information is for data communication, the data communication interface unit 2 is notified.
01 will be notified to the user.

The data communication interface unit 201
The information input through the wireless terminal 101 and the data communication device 103 are transmitted to the base station device 102 via the wireless control unit 205 by allocating the information to the slot for data communication by the information separating unit 206. (407), the information input through the call interface unit 203 is allocated to a slot for a call by the information separation unit 206, and the information is transmitted to the base station apparatus 102 via the wireless control unit 205. Terminal device 101
-A voice call can be made between the voice communication devices 104 (408).

In the method in which the communication channel in the wireless section is shared by a plurality of wireless terminal devices 101, when the user tries to start data communication and the communication channel is not set (FIG. 7), Is set (FIG. 8).

FIG. 7 is a diagram showing a second example of a data communication start sequence during a call according to the present invention in a case where a channel is not set in the shared channel data communication. FIG. 8 is a diagram showing, as a third example of a data communication start sequence during communication according to the present invention, a case where a channel has been set in shared channel data communication. Note that, in FIGS. 7 and 8, broken lines in the drawings indicate processing relating to a voice call.

When the communication channel is not set, as shown in FIG. 7, the radio terminal apparatus 101 performs communication from the base station apparatus 102 in the same procedure as when occupying the communication channel and performing data communication. A channel is allocated, and voice communication and data communication can be performed (502 to 508).

On the other hand, when a communication channel is set, as shown in FIG. 8, when a user attempts to start data communication, there is a user (terminal) already performing data communication. (509) Since data communication is started using the common communication channel, there is no need to have the base station apparatus 102 allocate communication channels, and information on the currently used communication channel is transmitted from the base station apparatus 102. It may be received (510). This information is notified to the wireless terminal device 101 by, for example, notifying from the base station device 102. Then, the wireless terminal device 10
1 and the wireless control units 205 and 301 of the base station apparatus 102 perform data communication start processing (511).

Here, terminal state determination section 306 of base station apparatus 102 determines whether or not wireless terminal apparatus 101 starting data communication is busy. When the wireless terminal device 101 is not in a call, the same process as in the related art is performed to allocate a channel for data communication.

When wireless terminal apparatus 101 is in a call, data communication determining section 308 determines whether another wireless terminal apparatus is performing data communication. When another wireless terminal device is not performing data communication, the same processing as when no communication channel is set is performed.

If there is a wireless terminal device performing data communication, frequency detecting section 307 detects the frequency of a communication channel used in data communication (50).
3). Then, the wireless control unit 301 of the base station device 102 performs processing for switching the communication slot used for voice communication with the wireless control unit 205 of the wireless terminal device 101 to the frequency detected by the frequency detection unit 307. (51
2).

The data communication control unit 30 of the base station device
2 controls the wired control unit (A) 303 to perform connection processing with the data communication apparatus 103 (506). After these processes are completed, the data communication between the wireless terminal device 101 and the data communication device 103 (507) and the wireless terminal device 1
A voice call (508) between the 01-voice communication device 104 can be performed.

Here, the frequency of the communication channel used for voice communication is switched to the frequency of the communication channel used for data communication. On the contrary, the frequency of the communication channel used for data communication is changed. Can be switched to the frequency of the communication channel used for voice communication.

(B) Initiating Call During Data Communication FIG. 9 is a diagram showing an example of a call connection sequence of a voice call during data communication according to the present invention.

When the wireless terminal device 101 performing data communication with the data communication device 103 starts a voice call, the user sets the wireless terminal device 1 during data communication (601).
The call interface unit 203 of No. 01 performs an operation of making a call connection to the voice communication device 104. When this operation is performed on the call interface unit 203, the call control unit 204 of the wireless terminal device 101 controls the wireless control unit 205 to perform call connection processing with the voice communication device via the base station device 102. Do.

Here, prior to the call connection processing, the radio control unit 205 of the radio terminal 101 first
2 is requested to allocate a communication channel used for communication (602). When radio control section 301 of base station apparatus 102 receives the link channel establishment request, terminal state determination section 3
At 06, it is determined whether or not the wireless terminal device 101 that is about to start a voice call is performing data communication. When the wireless terminal device 101 is not performing data communication, a channel for a call is allocated by the same processing as in the related art.

On the other hand, when the wireless terminal device 101 is performing data communication, the frequency detecting unit 307 detects the frequency of the communication channel used by the wireless terminal device 101 for data communication (603). Upon detecting the frequency of the communication channel at the time of data communication, the wireless control unit 301 transmits a link channel assignment instructing use of the frequency to the wireless control unit 205 of the wireless terminal device 101 (604).
After transmitting the link channel assignment, the wireless terminal 10
Call connection processing (605, 606) between 1-base station apparatus 102 and between base station apparatus 102 and voice communication apparatus 104 is performed.
Thereby, the wireless terminal device 101-the data communication device 10
3 (607) and the wireless terminal 101-
The voice communication (608) between the voice communication devices 104 can be performed in a time sharing manner.

As described above, when the wireless terminal device 101 starts data communication or telephone conversation, a channel is set at the frequency used in the state immediately before the data communication or call. Data communication or voice communication can be performed via the base station device 102 without switching frequencies between calls.

Note that the radio terminal 101 is connected to the base station 1
When performing data communication with the data communication apparatus 103 via the communication device 02, it is also possible to use a control slot used for an outgoing / incoming call or the like, and to perform data communication using a communication frequency on the control slot. .

[0087]

As described above, according to the present invention, when a terminal device starts a call during data communication, or when a data communication starts during a call, the base station device is used in the state immediately before it. Detecting the frequency that has been performed, performs channel setting, performs data communication and communication using the same frequency, and furthermore, since the terminal device can separate the information for communication and the information for data communication, In the terminal device, data communication and telephone conversation can be simultaneously performed via the base station device without switching the frequency. Therefore, multiple wireless units or synthesizers can be mounted on the terminal device,
Alternatively, it is not necessary to mount a high-speed synthesizer, so that the price and the weight can be reduced, and the wireless resources can be effectively used.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a wireless communication system that enables data communication and voice communication according to the present invention.

FIG. 2 is a block diagram showing a configuration of a wireless terminal device of the present invention.

FIG. 3 is a block diagram showing a configuration of a base station device according to the present invention.

FIG. 4 is a block diagram showing a configuration of a control function of the wireless terminal device.

FIG. 5 is a block diagram showing a configuration of a control function of the base station device.

FIG. 6 is a diagram showing a channel occupation type data communication sequence as a first example of a data communication start sequence during a call according to the present invention.

FIG. 7 is a diagram showing a second example of a data communication start sequence during a call according to the present invention when a channel is not set in shared channel data communication.

FIG. 8 is a diagram showing, as a third example of a data communication start sequence during communication according to the present invention, a case where a channel has been set in shared channel data communication.

FIG. 9 is a diagram showing a call connection sequence example of a voice call during data communication according to the present invention.

FIG. 10 is a block diagram showing a configuration of a control function of a conventional wireless terminal device.

FIG. 11 is a block diagram showing a configuration of a control function of a conventional wireless terminal device.

FIG. 12 is a diagram showing a call connection sequence example of a conventional voice call.

FIG. 13 is a diagram showing a case of channel occupancy type data communication as a first example of a conventional data communication start sequence.

FIG. 14 is a diagram showing a conventional data communication start sequence example 2 in a case where a channel is not set in shared channel data communication.

FIG. 15 is a diagram showing, as a conventional data communication start sequence example 3, a case where a channel has been set in shared channel data communication.

[Explanation of symbols]

 Reference Signs List 101 wireless terminal device 102 base station device 103 data communication device 104 voice communication device 201 data communication interface unit 202 data communication control unit 203 communication interface unit 204 call control unit 205 wireless control unit 206 information Separation unit 301 Wireless control unit 302 Data communication control unit 303 Wired control unit A 304 Call control unit 305 Wired control unit B 306 Terminal state determination unit 307 Frequency detection unit 308 Data communication determination unit

Claims (8)

[Claims] 1. A wireless communication system comprising at least one base station device constituting a wireless area and a wireless communication terminal connected to the base station device via a wireless network, wherein the base station device comprises: Terminal state determining means for determining whether or not the communication terminal is engaged in a call; and, as a result of the terminal state determining means, detecting a frequency of a channel used in the call when the wireless communication terminal is in a call. Setting a data communication channel between the wireless communication terminal and the wireless communication terminal using the frequency detected by the frequency detection means when the wireless communication terminal starts data communication during a call. Channel setting means, wherein the wireless communication terminal transmits and receives information for voice communication and information for data communication with the base station apparatus at the same frequency. A wireless communication system comprising: a control unit; and an information separating unit that separates information transmitted and received by the wireless control unit for voice communication and data communication. 2. A wireless communication system comprising at least one base station device constituting a wireless area and a wireless communication terminal connected to the base station device via a wireless network, wherein the base station device comprises: Terminal state determining means for determining whether or not the communication terminal is performing data communication; and, as a result of the terminal state determining means, when the wireless communication terminal is performing data communication, the channel used in the data communication is determined. Frequency detection means for detecting a frequency, and when the wireless communication terminal starts a call during data communication, a communication channel between the wireless communication terminal and the wireless communication terminal using the frequency detected by the frequency detection means. Channel setting means for setting, wherein the wireless communication terminal transmits and receives information for voice communication and information for data communication with the base station apparatus at the same frequency. A wireless communication system comprising: wireless control means for transmitting information; and information separating means for separating information transmitted and received by the wireless control means for voice communication and data communication. 3. A wireless communication system comprising: at least one base station device constituting a wireless area; and a plurality of wireless communication terminals connected to the base station device via a wireless network. In a wireless communication system that performs data communication in a shared manner, the base station apparatus includes: a terminal state determination unit that determines whether the wireless communication terminal is in a call; A data communication determining means for determining whether or not another wireless communication terminal is performing data communication when the terminal is engaged in a call; and if the other wireless communication terminal is performing data communication by the data communication determining means, Frequency determination means for detecting a frequency of a channel used in the data communication when the determination is made, and when the wireless communication terminal starts data communication during a call, Channel setting means for setting a channel for data communication with the wireless communication terminal using a frequency detected by the wave number detecting means, wherein the wireless communication terminal has a voice call with the base station device. Wireless control means for transmitting and receiving information for communication and information for data communication at the same frequency; and information separating means for separating information transmitted and received by the wireless control means for voice communication and data communication. Wireless communication system. 4. The wireless communication terminal according to claim 1, wherein when performing data communication via the base station apparatus, the wireless communication terminal performs data communication using a communication frequency on a control slot. 3. The wireless communication system according to any one of 3. 5. A base station apparatus connected to a wireless communication terminal via a wireless network, comprising: a terminal state determining means for determining whether or not the wireless communication terminal is engaged in a telephone call; Frequency detection means for detecting a frequency of a channel used in the call when the wireless communication terminal is in a call; and when the wireless communication terminal starts data communication during the call, the frequency detection means A base station apparatus comprising: channel setting means for setting a channel for data communication with the wireless communication terminal using a frequency to be detected. 6. A base station apparatus connected to a wireless communication terminal via a wireless network, comprising: a terminal state determining means for determining whether the wireless communication terminal is performing data communication; and a result of the terminal state determining means. Frequency detecting means for detecting a frequency of a channel used in the data communication when the wireless communication terminal is performing data communication; and A base station apparatus comprising: channel setting means for setting a communication channel with the wireless communication terminal using a frequency detected by the detection means. 7. A base station apparatus connected via a wireless network to a wireless communication terminal that communicates by sharing a wireless network, wherein terminal state determination means for determining whether the wireless communication terminal is busy. As a result of the terminal state determining means, the data communication determining means determines whether or not another wireless communication terminal is performing data communication when the wireless communication terminal is in a telephone call. Frequency detecting means for detecting a frequency of a channel used in the data communication when it is determined that another wireless communication terminal is performing data communication; and starting data communication while the wireless communication terminal is in a call. And a channel setting means for setting a channel for data communication with the wireless communication terminal using a frequency detected by the frequency detecting means. Apparatus. 8. A wireless communication terminal which is connected to at least one base station device constituting a wireless area via a wireless network and performs voice communication or data communication, a state immediately before data communication or communication is started. Wireless control means connected to the base station apparatus at the frequency used in the wireless communication means for transmitting and receiving information for voice communication and information for data communication with the base station apparatus at the same frequency; and A wireless communication terminal comprising: an information separating unit that separates information to be transmitted and received for voice communication and data communication.