JP2000174839A - Radio communication system and radio portable terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain flexible communication by conducting layer connection processing when receiving a connection message of a 3rd layer during holding and transmitting an interrupt message of 1st and 2nd layers to a mobile station, when the message is not being received so as to easily revise information transmission capability. SOLUTION: Mobile stations 100, 102 transmit an interrupt message whose interrupt cause is reconnection to a base station 101 during the base station 101 with a 1st information transmission capability, releases connection of a 3rd layer and transmits the connection request message of the 3rd layer with a 2nd information transmission capability set thereto to the base station 101. Upon the receipt of the interrupt message, whose interrupt cause is reconnection during communication with the mobile stations 100, 102 with the 1st information transmission capability, the base station 101 releases the connection of the 3rd layer and holds transmission of the interrupt message of the 1st layer to the mobile stations 100, 102 for a prescribed time. When the connection request message of the 3rd layer is not being received during holding, the base station 101 transmits the interrupt message of the 2nd and 1st layers to the mobile stations 100, 102.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication system comprising a base station and a mobile station, wherein the radio communication system performs radio transmission between the base station and the mobile station by using two or more information transmission capabilities, and the mobile communication system. The present invention relates to a wireless portable terminal forming a station.

[0002]

2. Description of the Related Art In recent years, wireless communication technology and computer technology have been remarkably developed, so that various services such as exchange of still images and moving images as well as voices can be used while connecting to various communication networks using a wireless communication terminal even while moving. Now you can. Current PHS (Personal Handyphone System)
m), TDMA / TDD (Time Division Mul
Communication services, such as e-mail and database access, have already been started using data transmission of the Tiple Access / Time Division Duplex method.

FIG. 6 is a block diagram showing a configuration example of a wireless communication system using PHS.

In FIG. 6, a radio zone is formed by a PHS base station 600, and a PHS is included in the radio zone.
The figure shows a situation where there are a plurality of mobile stations such as a telephone 601, a PHS information terminal 602, and a PHS videophone 603.
In PHS, the access method is TDMA, and the transmission method is TDMA.
The DD system is used. Since these systems are standardized by the second generation cordless telephone system RCRSTD-28 standard, the details are omitted.

[0005] In the PHS, a radio channel represents a physical channel specified by a slot number and a carrier number, and is broadly divided into a control channel (CCH) and an information channel (TCH). In performing wireless communication, a base station assigns slot numbers and carrier numbers to mobile stations.

[0006] The slot number is a number assigned to each time slot in the TDMA system, and the PHS has four slots each for uplink and downlink. The carrier number is a number assigned to a frequency band that can be used in the PHS. In RCRSTD-28, the base station allocates wireless channels found by searching for an available wireless channel on a first-come, first-served basis. FIG. 7 shows the relationship between TDMA frames and slots.

FIG. 8 is an explanatory diagram showing the configuration of a communication physical slot.

As shown, an information channel (TCH) 8
00 is time-division multiplexed on the same physical slot as the associated control channel 801. This associated control channel is S
It is called ACCH and is used for call setup and data link establishment. In addition, an FA that can transmit and receive control information at high speed using one physical slot is additionally provided in the associated control channel.
There is CCH802.

FIG. 9 is a sequence chart simply showing a procedure in a case where an operation of starting communication is performed by an operator of the mobile station in the PHS radio zone.

First, the mobile station 900 transmits a link channel establishment request message to the base station 901 on the control channel in order to request information channel allocation. The base station 901 determines which slot number-carrier number
00 is determined, and the mobile station 900 is notified to that effect by a link channel allocation message.

[0011] The mobile station 900 that has physically moved to the allocated information channel transmits a call setup message to the base station 901 in order to establish a connection on the line at layer 3.
Send to

The information element which must be included in the call setup message has a transmission capability.
Is coded as shown. Here, the information transfer capability of octet 3 is set to 000000 (voice) when the mobile station uses the PHS as a voice telephone, and 01000 (unrestricted digital information) when performing unrestricted digital communication or the like.

[0013] When a base station 901 notifies the base station 901 of a call setting confirmation message in response to the call setting message, further negotiations regarding radio management (RT) and mobility management (MM) are performed between the mobile station 900 and the base station 901. And enter the communication state. Therefore, the information transmission capability specified in the call setup message is not changed after entering the communication state.

[0014]

By the way, as already known, if PHS data transmission is used,
It is also possible to transmit an important task or a task that is difficult to explain in words as a text document like a fax. In the future, it is also possible to realize a videophone by displaying the face of the other party on a display connected to (or integrated with) the telephone.

However, as described in the above-mentioned prior art, in the PHS system, it is impossible to perform unrestricted digital communication halfway between a mobile station and a base station connected as a voice call at the start of communication.

Therefore, for example, when a telephone call for consent is made in advance to transmit image information captured by a digital camera, or when it is desired to send a map during a telephone call to explain a difficult place, a voice call is made once. I had to disconnect and reconnect to an unrestricted digital line. Such an operation has a drawback that it is very troublesome for an operator, and often causes inconvenience.

FIG. 11 is a sequence chart showing the procedure when the operator disconnects the voice communication line and reconnects to the unrestricted digital communication line.

The first mobile station 110 completes the disconnection of the radio channel for voice communication, and the operator performs a reconnection operation (on-hook,
Redial, etc.), the base station 111
In some cases, an empty slot is assigned to the mobile station 112. At this time, there is an inconvenience that the operator of the first mobile station 110 has to redial a number of times until a slot becomes available.

As shown in FIG. 7, the number of communication slots that can be controlled by one base station in the PHS system is determined to be four, and in some systems (for example, in a PHS system private radio communication system), In some cases, the number of communication slots that can be controlled by the base station is set to four or less. In a wireless communication system in which a plurality of mobile stations are controlled with a limited number of slots as described above, considering the operation speed when an operator disconnects and reconnects a line, an empty slot is intercepted by another station. It is very likely that this will happen, and this is also a problem.

Further, if the operator is so dissatisfied with the above, the functions of expensive terminals cannot be utilized, such as the image transmission function not being used.

It is an object of the present invention to provide a wireless communication system and a wireless portable terminal capable of performing flexible communication by easily changing to different information transmission capabilities during communication.

[0022]

A radio communication system according to the present invention comprises a base station and a mobile station, and performs radio transmission between the base station and the mobile station with at least two or more information transmission capabilities. The wireless communication system, wherein the mobile station transmits a disconnection message having a disconnection reason of reconnection to the base station during communication with the base station according to the first information transmission capability, and releases the layer 3 connection. The base station has a function of transmitting a layer 3 connection request message to which a second information transmission capability has been set to the base station, and the base station communicates with the mobile station according to the first information transmission capability while the disconnection reason is reconnection. When the disconnection message is received, the transmission of the layer 2 and layer 1 disconnection messages to the mobile station is suspended for a certain period of time after releasing the layer 3 connection, and when the layer 3 connection request message is received during the suspension. Has a function of performing a layer 3 connection process, and transmitting a layer 2 and layer 1 disconnection message to the mobile station when a layer 3 connection request message is not received during the hold. I do.

According to the present invention, a mobile station of a wireless communication system comprising a base station and a mobile station and performing wireless transmission between the base station and the mobile station with at least two or more information transmission capabilities is provided. The wireless portable terminal includes switch means for changing information transmission capability of wireless transmission, and when the switch means is operated during communication with the base station by the first information transmission capability, a wireless communication line with the base station is provided. Is disconnected, the second information transmission capability is set, and the wireless communication line connection processing with the base station is performed again.

According to the present invention, a mobile station of a wireless communication system comprising a base station and a mobile station and performing wireless transmission between the base station and the mobile station with at least two or more information transmission capabilities is provided. The wireless portable terminal has switch means for changing the information transmission capability of wireless transmission, and when the switch means is operated during communication with the base station by the first information transmission capability, a layer 3 with the base station is changed. Disconnect,
The second information transmission capability is set, and the connection processing between the base station and the layer 3 is performed again.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, prior to the description of the operation of changing the information transmission capability, which is a feature of the present invention, the configurations of the mobile station and the base station that constitute the wireless communication system of the present embodiment will be described. .

FIG. 12 is a block diagram showing a configuration of a mobile station in a radio communication system according to an embodiment of the present invention.

The radio section 1101 is a unit for transmitting and receiving radio waves, and includes a transmission section 1113, a reception section 1114, and an antenna 1115. The signal processing unit 1102 detects the received signal, converts the signal into a digital signal, and modulates the digital signal sent from the time division processing unit 1103 to transmit it wirelessly.

The time-division processing unit 1103 includes the audio processing unit 11
Assemble the digitized voice information and control information from the digital communication interface and the data from the digital communication interface into a time division multiplex communication system, and convert the received time division multiplex communication data into control information and voice information or data communication data. The audio information is sent to the codec of the audio processing unit 1104, and the data is sent to the reception data buffer 1106.

The audio processing unit 1104 converts the audio signal from the microphone 1112 into a digital signal and converts the audio signal into a digital signal.
The digital signal is sent to the receiver 103, and the digital signal from the time division processing unit 1103 is converted to an analog signal and output to the receiver 1111.

Transmission data buffer 1105 temporarily stores transmission data during data communication, and reception data buffer 1106 temporarily stores data received during data communication.

A control unit 1107 controls the entire wireless communication apparatus, adds a sequence number and the like to data input from the data communication interface during data communication, sends the data to the transmission data buffer 1105, and transmits the data to the reception data buffer 1105. It receives the received data from 1106, removes the sequence number, and sends it to the data communication interface 1108.

The data communication interface 1108 accommodates a data communication terminal or the like, and
Reference numeral 09 has a number of operation keys for inputting various information. The battery 1110 is for obtaining a drive power supply of the apparatus, and the receiver 1111 is for the audio processing unit 1.
This is a speaker that performs audio output based on the analog audio signal from 104. The microphone 1112 inputs voice and outputs the voice to the voice processing unit 1104. Switching unit 111
Reference numerals 6 and 1117 switch between a voice communication path and a data communication path.

FIG. 13 is a block diagram showing a configuration of a base station of a wireless communication system according to an embodiment of the present invention.

The radio section 1201 is a unit for transmitting and receiving radio waves, and includes a transmitting section 1209, a receiving section 1210, and an antenna 1211. The signal processing unit 1202 detects the received signal, converts the signal into a digital signal, and modulates the digital signal sent from the time division processing unit 1203 to transmit it wirelessly.

The time division processing unit 1203 assembles the digitized voice information and control information from the ISDN interface 1208 and the data in the transmission data buffer 1204 during data communication into a time division multiplex communication system, and receives the received time division multiplex communication system. Is decomposed into control information and voice information or data for data communication, and the voice information and control information are passed through a data buffer 1207 to the ISDN.
The data is sent to the interface 1208 and the received data buffer 1205.

The transmission data buffer 1204 temporarily stores transmission data during data communication, and the reception data buffer 1205 temporarily stores reception data during data communication.

The control section 1206 controls the entire wireless communication apparatus, and adds a sequence number to data input from the ISDN interface 1208 during data communication, sends the data to the transmission data buffer 1204, and receives and receives data. Receives the received data from the data buffer 1205, removes the sequence number, and
08.

The data buffer 1207 is used for the ISDN 1
214 for smooth communication between the wireless telephone 214 and the wireless telephone.
It accommodates N lines. Switching units 1212, 121
Reference numeral 3 switches between a voice communication route and a data communication route.

It is assumed that the overall configuration example of the wireless system is the same as the example shown in FIG. 6, for example. [First Embodiment] In the first embodiment of the present invention having the above-described configuration, in a wireless portable terminal constituting a mobile station, a line is automatically disconnected during a voice call and an unrestricted digital information communication mode is set. Has an information transmission capability change switch for automatically reconnecting to the server. Then, when it is desired to perform unrestricted digital communication during a voice call, the operator only needs to operate the information transmission capability change switch once. Further, when it is desired to return to the voice call, the operator only needs to operate the information transmission capability change switch once. The information transmission capability change switch may be in the form of a push button or an input format displayed on a liquid crystal touch panel, or may be a switch that detects a voice command input by providing a terminal with a voice recognition function.

FIG. 1 is a sequence chart for explaining the operation of this embodiment.

When the operator of the mobile station 100 operates the information transmission capability change switch during a voice call between the mobile station 100 and the base station 101, the mobile station 100 transmits a disconnection message to the base station 101. When the release message is returned from the base station 101, the mobile station 100 transmits a release completion message to the base station, and the disconnection of the layer 3 is completed.

Next, the layer 2 is disconnected by the exchange of the DISC and the UA, and finally the disconnection of the voice communication line is completed by the disconnection of the radio channel and the completion of the disconnection of the radio channel.

Then, immediately, the mobile station 100 transmits a link channel establishment request message to the base station 101 to request information channel allocation. Base station 101
Determines which slot number-carrier number is to be assigned to the mobile station 100, and notifies the mobile station 100 of this in a link channel assignment message. The mobile station 100 physically moved to the assigned information channel
After connecting Layer 2 by the exchange of BM and UA,
A call setup message is transmitted to the base station 101 in order to establish a connection on the line at layer 3. At this time, 01000 (unrestricted digital information) is set as the information transfer capability in the message.

When the base station 101 notifies the base station 101 of the call setting confirmation message that is a response to the call setting message, negotiations regarding radio management (RT) and mobility management (MM) are further performed between the mobile station 100 and the base station 101. And enter the communication state.

Therefore, according to this embodiment, for example, it is desired to make a telephone call for consent in advance to transmit image information taken by a digital camera, or to send a map during a telephone call to explain a difficult place. In such a case as well, the operator can operate the information transmission capability change switch only once to smoothly shift to the unrestricted digital communication without the operator being particularly aware of the disconnection of the line.

Further, since the time during which the mobile station releases the radio channel during the switching from the voice call to the unrestricted digital communication is greatly reduced as compared with the conventional mobile station, the other mobile station 102
It is very unlikely that the slot will be intercepted. Therefore, without the operator feeling frustrated and inconvenient,
The transition to unrestricted digital communication will be smooth.

Further, according to the present embodiment, the line is automatically disconnected during the unrestricted digital information communication, and the line is automatically reconnected to the voice communication line. That is, after transmitting image information captured by a digital camera, for example, it is possible to smoothly return to the voice call again.

In this embodiment, the operation has been described in accordance with the PHS system for the sake of convenience. However, the present invention relates to a voice communication system in a radio communication system using a TDMA system or the like comprising a base station and a mobile station. Or, of course, it can be widely applied to various wireless portable terminals used for non-voice calls. [Second Embodiment] In a second embodiment of the present invention, a radio portable terminal constituting a mobile station of a radio communication system disconnects a voice communication line and reconnects with an unrestricted digital communication line, and displays a reason indication value. Is set to “reconnect”, a disconnection message is transmitted to the base station, and a layer 2 connection request message is subsequently transmitted. On the other hand, the base station sets the disconnection cause display value to “reconnect”.
Is received, the transmission of the wireless channel disconnection message is suspended for a certain period of time.

In this embodiment, similarly to the first embodiment, the wireless portable terminal has an information transmission capability change switch, and is used when unrestricted digital communication is required during voice communication or when voice communication is performed. , The operator only needs to operate the information transmission capability change switch once.

FIG. 2 is a sequence chart for explaining the operation of the second embodiment.

When the operator of the mobile station 200 operates the information transmission capability change switch during a voice call between the mobile station 200 and the base station 201, the mobile station 200 transmits a disconnection message to the base station 201.

An information element which must be included in the disconnection message has a reason indication, and is specifically coded as shown in FIG. In the wireless portable terminal of the present embodiment, the specification type of octet 3a is 0001 at this time.
000 (option), and 0010111 (reconnection) is set as the reason display value of octet 4.

FIG. 5 is a flowchart for explaining the processing of the base station 201 which has received the disconnection message set to the above value.

When receiving the disconnection message during communication (S1), the base station 201 first transmits a release message (S2). At this time, if the specification type of the disconnection message is “option” and the reason display value is “reconnect” (S
4) When the next release completion message is received (S3)
Then, a timer is started (S5). If a call setup message is received from the mobile station 200 during the activation of the timer (S
6, S7), and proceeds to the layer 3 connection processing. If the timer is out (S7), the normal layer 2 and layer 1
Continue the disconnection process.

After transmitting the disconnection message and the release completion message set to “reconnect”, the mobile station 200 immediately transmits a call setup message to the base station 201 to establish the layer 3 reconnection. At this time, 01000 (unrestricted digital information) is set as the information transfer capability in the message. Further, since the link of the FACCH is disconnected before the start of the voice call (in the exchange between DISC and UA in FIG. 9), all the exchanges of the control information for reconnection are performed on the SACCH.

When the base station 201 notifies the base station 201 of the call setting confirmation message that is a response to the call setting message, the mobile station 200 and the base station 201 further negotiate radio management (RT) and mobility management (MM). And then enter the communication state again.

As described above, in this embodiment, since the mobile station does not release the radio channel while switching from voice communication to unrestricted digital communication, the slot is not intercepted by another mobile station 202.

Therefore, the operator can smoothly shift to the unrestricted digital communication without feeling annoyed or inconvenient. That is, in the present embodiment, a system can be configured that is particularly effective in a wireless communication system in which many mobile stations are placed under the control of a limited number of slots (for example, a PHS in a self-service mode).

Further, according to the present embodiment, the radio channel is not released in the switching to disconnect the line during the unrestricted digital information communication and reconnect to the voice communication line.
It is also possible to smoothly return from unrestricted digital communication to voice communication again.

In this embodiment, the operation has been described in accordance with the PHS system for the sake of convenience. However, the present invention is not limited to a voice communication system in a radio communication system using a TDMA system or the like comprising a base station and a mobile station. Or, of course, it can be widely applied to various wireless portable terminals used for non-voice calls. [Third Embodiment] A wireless portable terminal constituting a mobile station of a wireless communication system according to a third embodiment of the present invention sets a reason indication value when disconnecting a voice communication line and reconnecting with an unrestricted digital communication line. It sets "reconnect" and transmits a disconnection message to the base station, and then transmits a layer 2 connection request message. On the other hand, when receiving the disconnection message whose disconnection reason display value is “reconnect”, the base station suspends transmission of the wireless channel disconnection message for a certain period of time.

Also in this embodiment, as in the first embodiment, the wireless portable terminal has an information transmission capability change switch, so that when the user wants to perform unrestricted digital communication during a voice call, or furthermore, , The operator only needs to operate the information transmission capability change switch once.

FIG. 3 is a sequence chart for explaining the operation of the third embodiment.

The difference from the second embodiment is that the mobile station 300 transmits the SABM to the base station 301 after releasing the voice communication channel, and uses the FACCH channel for the subsequent exchange of control information. Therefore, it is characterized in that control information regarding reconnection can be transmitted and received at high speed. The other operations are the same as those in the second embodiment, and the description is omitted.

[0064]

As described above, in the radio communication system according to the present invention, the mobile station, while communicating with the base station by the first information transmission capability, sends to the base station a disconnection message whose disconnection reason is reconnection. After transmitting and releasing the layer 3 connection, the second
When the base station receives a disconnection message whose disconnection reason is reconnection during communication with the mobile station by the first information transmission capability, the layer 3 transmits a layer 3 connection request message to which the information transmission capability is set. , After releasing the layer 3 connection,
The transmission of the layer 2 and layer 1 disconnection messages to the mobile station is suspended for a certain period of time. If a layer 3 connection request message is received during the suspension, the layer 3 connection processing is performed. When a connection request message is not received, a layer 2 and layer 1 disconnection message is transmitted to the mobile station.

Therefore, according to the present invention, flexible communication can be performed by easily changing to a different information transmission capability during communication. In particular, since the wireless channel is not released during the switching of the information transmission capability, the slot is not intercepted by another mobile station, and the communication can be smoothly shifted to the communication with the different information transmission capability.

Further, the wireless portable terminal constituting the mobile station according to the present invention has switch means for changing the information transmission capability of wireless transmission, and the switch means during communication with the base station by the first information transmission capability. Is operated, the wireless communication line with the base station is disconnected, the second information transmission capability is set, and the wireless communication line connection processing with the base station is performed again.

Therefore, according to the present invention, for example, when the operator wants to perform unrestricted digital communication or voice communication during voice communication or unrestricted digital communication, only the information transmission capability change switch means is operated. ,
The operator can smoothly shift to unrestricted digital communication or voice communication without special consideration of disconnection.

In addition, since the time during which the mobile station releases the radio channel during switching from voice communication to unrestricted digital communication is greatly reduced as compared with the conventional art, switching from voice communication to unrestricted digital communication is performed. The possibility that another mobile station will intercept the slot during this time is very low, and the operator can smoothly transition to communication with different information transmission capabilities without feeling frustrated or inconvenient.

Further, the wireless portable terminal constituting the mobile station according to the present invention has switch means for changing the information transmission capability of wireless transmission, and the switch means is in communication with the base station by the first information transmission capability. When operated, the connection of the layer 3 with the base station is disconnected, the second information transmission capacity is set, and the connection processing of the layer 3 with the base station is performed again.

Therefore, according to the present invention, for example, when the operator wants to perform unrestricted digital communication or voice communication during voice communication or unrestricted digital communication, only the information transmission capability change switch means is operated. ,
It is possible to smoothly shift to unrestricted digital communication or voice communication without disconnecting the line.

In particular, since the wireless channel is not released during the switching of the information transmission capability, the slot is not intercepted by another mobile station, and the communication can be smoothly shifted to the communication with the different information transmission capability.

[Brief description of the drawings]

FIG. 1 is a sequence chart showing a communication procedure according to a first embodiment of the present invention.

FIG. 2 is a sequence chart showing a communication procedure according to a second embodiment of the present invention.

FIG. 3 is a sequence chart showing a communication procedure according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram showing coding of a disconnect message reason indication used in the embodiment.

FIG. 5 is a flowchart showing an operation of the base station in the second embodiment.

FIG. 6 is a block diagram illustrating a configuration example of a wireless communication system.

FIG. 7 is an explanatory diagram showing a basic configuration of a PHS slot.

FIG. 8 is an explanatory diagram showing a physical slot for communication of a PHS.

FIG. 9 is a sequence chart showing a control operation at the time of calling a PHS.

FIG. 10 is an explanatory diagram showing coding of a call setup message transmission capability.

FIG. 11 is a sequence chart showing a disconnection procedure at the time of calling a PHS.

FIG. 12 is a block diagram illustrating a configuration of a mobile station in a wireless communication system according to an embodiment of the present invention.

FIG. 13 is a block diagram illustrating a configuration of a base station of a wireless communication system according to an embodiment of the present invention.

[Explanation of symbols]

100, 102, 200, 202, 300, 302: mobile station; 101, 201, 301: base station.

Claims (18)

[Claims] 1. A wireless communication system comprising a base station and a mobile station, and performing wireless transmission between the base station and the mobile station with at least two or more information transmission capabilities, wherein the mobile station comprises: During communication with the base station by the first information transmission capability, a disconnection message whose disconnection reason is reconnection is transmitted to the base station to release the layer 3 connection, and then the layer 3 of the second information transmission capability is set. The base station has a function of transmitting a connection request message to a base station. When the base station receives a disconnection message whose disconnection reason is reconnection during communication with the mobile station by the first information transmission capability, the base station establishes a layer 3 connection. , The transmission of the Layer 2 and Layer 1 disconnection messages to the mobile station is suspended for a certain period of time. If a Layer 3 connection request message is received during this suspension, the Layer 3 connection processing is performed. on hold Wireless communication system if it does not receive a Layer 3 connection request message, which has a function of transmitting the disconnection message of a layer-2 and layer 1 to the mobile station, characterized in that the. 2. The wireless communication system according to claim 1, wherein access is performed between the base station and the mobile station by a TDMA method. 3. The wireless communication system according to claim 1, wherein the two or more information transmission capabilities include voice communication and non-voice communication. 4. A wireless portable terminal comprising a base station and a mobile station, and constituting a mobile station of a wireless communication system for performing wireless transmission between the base station and the mobile station with at least two or more information transmission capabilities. And a switch means for changing an information transmission capability of wireless transmission. When the switch device is operated during communication with the base station by the first information transmission capability, a wireless communication line with the base station is disconnected. A wireless communication terminal for setting a second information transmission capability and performing a wireless communication line connection process with a base station again. 5. The wireless portable terminal according to claim 4, wherein access is made to the base station by a TDMA method. 6. The wireless portable terminal according to claim 4, wherein the two or more information transmission capabilities include voice communication and non-voice communication. 7. A wireless portable terminal comprising a base station and a mobile station, and constituting a mobile station of a wireless communication system for performing wireless transmission between the base station and the mobile station with at least two or more information transmission capabilities. A switch means for changing an information transmission capability of wireless transmission, wherein when the switch means is operated during communication with the base station by the first information transmission capability, a layer 3 connection with the base station is disconnected. And a second information transmission capability is set, and a connection process between the base station and the layer 3 is performed again. 8. The wireless portable terminal according to claim 7, wherein access is made to the base station by a TDMA method. 9. The wireless portable terminal according to claim 7, wherein the two or more information transmission capabilities include voice communication and non-voice communication. 10. A control method for a wireless communication system comprising a base station and a mobile station, wherein the wireless communication system performs wireless transmission between the base station and the mobile station with at least two or more information transmission capabilities, During communication with the base station by the first information transmission capability, the station transmits a disconnection message whose disconnection reason is reconnection to the base station to release the layer 3 connection, and then sets the second information transmission capability. The base station transmits a connection request message of layer 3 to the base station. When the base station receives a disconnection message whose reason for disconnection is reconnection during communication with the mobile station by the first information transmission capability, the base station , The transmission of the layer 2 and layer 1 disconnection messages to the mobile station is suspended for a certain period of time, and if a layer 3 connection request message is received during the suspension, the layer 3 connection processing is performed. Performed, also if it does not receive a Layer 3 connection request message to the pending controls to transmit a disconnect message Layer 2 and Layer 1 to the mobile station, the control method of the wireless communication system, characterized in that. 11. The control method according to claim 10, wherein access is performed between the base station and the mobile station by a TDMA method. 12. The control method according to claim 10, wherein the two or more information transmission capabilities include voice communication and non-voice communication. 13. A wireless portable terminal comprising a base station and a mobile station, and constituting a mobile station of a wireless communication system for performing wireless transmission between the base station and the mobile station with at least two or more information transmission capabilities. The control method according to claim 1, further comprising: a switch step of changing an information transmission capability of wireless transmission. When the switch step is performed during communication with the base station by the first information transmission capability, a wireless communication line with the base station is provided. And controlling the wireless communication terminal to set the second information transmission capability and perform the wireless communication line connection processing with the base station again. 14. The control method for a wireless portable terminal according to claim 13, wherein an access is made to the base station by a TDMA method. 15. The method according to claim 13, wherein the two or more information transmission capabilities include voice communication and non-voice communication. 16. A wireless portable terminal comprising a base station and a mobile station, and constituting a mobile station of a wireless communication system for performing wireless transmission between the base station and the mobile station with at least two or more information transmission capabilities. The control method according to claim 1, further comprising: a switch step of changing an information transmission capability of wireless transmission. When the switch process is performed during communication with the base station by the first information transmission capability, a layer 3 with the base station is changed. A method for controlling a wireless portable terminal, comprising disconnecting a connection, setting a second information transmission capability, and performing control so that a connection process between the base station and the layer 3 is performed again. 17. The control method for a wireless portable terminal according to claim 16, wherein an access is made to the base station by a TDMA method. 18. The method according to claim 16, wherein the two or more information transmission capabilities include voice communication and non-voice communication.