JP2001320750A - Radio communication terminal and radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid in advance the continuation of a silent state over a long time. SOLUTION: When the silent state is detected to continue for a predetermined time or more, a radio status report 2 is transmitted to a portable telephone network 10. The portable telephone network 10 transmits the designation of a radio channel for changeover destination, when the radio status report 2 is received from the portable telephone terminal 1. When the portable telephone terminal 1 receives the designation of the radio channel for changeover destination from the portable telephone network 10, it can perform switching of the communication channel. Thereafter, the continuation of the silent state is avoided previously to continue over a long time by performing switching to other communication channels from a communication channel responsible for the silent state when the communication channel of the changeover destination is normal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication terminal such as a portable telephone terminal and a radio communication system provided with the above radio communication terminal and a communication network.

[0002]

In recent years, wireless communication terminals such as portable telephone terminals have become widespread with the progress of telecommunication technology. By the way, in a mobile phone terminal, when a trouble occurs in a communication channel, a silent state may be suddenly caused due to the trouble even though the communication channel is established.

[0003] However, if the silent state continues for a long time, it becomes impossible to communicate voice during that time, which is inconvenient. Also,
If a pay-as-you-go system, in which the communication fee depends on the communication time, is adopted, a communication channel in which some trouble has occurred has been established in the meantime, although it is impossible to communicate voice. As a result, a communication fee is charged, which is inferior in economy.

The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent a silent state from continuing for a long period of time.
An object of the present invention is to provide a wireless communication terminal and a wireless communication system that can improve usability and, if a pay-as-you-go system is adopted, can also improve economic efficiency.

[0005]

According to the wireless communication terminal of the present invention, when the control means detects that the silence state has continued for a predetermined time or more, the control means transmits a message of the wireless state report 2 by the wireless means. Since the communication network is configured to transmit the message, when the communication network receives the message of the wireless status report 2 from the wireless communication terminal, the communication network transmits the message specifying the switching destination wireless channel. When the terminal receives the message specifying the destination wireless channel from the communication network, the terminal switches the communication channel.

Therefore, by switching from the communication channel that caused the silence state to another communication channel, if the communication channel to be switched to is normal, the silence state will continue for a long time thereafter. Can be avoided beforehand, and voice can be communicated. As a result, usability can be improved and, if a pay-as-you-go system in which the communication fee depends on the communication time is adopted, the economic efficiency can be improved.

According to the wireless communication terminal of the second aspect, the control means is configured to detect whether or not there is a silent state based on the quantization gain in speech coding. Since it is a physical quantity calculated when performing the encoding process, there is no need to separately calculate a new physical quantity to detect whether or not there is a silence state, and compare whether or not there is a silence state Target can be easily detected.

According to a third aspect of the present invention, in the wireless communication terminal, when the control unit detects that the silent state has continued for a predetermined time or more, the control unit determines that the silent state has continued for a predetermined time or more. Is transmitted to the communication network by wireless means, and the communication network is configured to, upon receiving the message from the wireless communication terminal, transmit a message specifying the switching destination wireless channel to the wireless communication terminal. Accordingly, when the wireless communication terminal receives the message for specifying the wireless channel to be switched from the communication network, the wireless communication terminal switches the communication channel.

Therefore, by switching from the communication channel that caused the silence state to another communication channel in the same manner as in the first aspect,
If the communication channel of the switching destination is normal, it is possible to prevent a silent state from continuing for a long time after that, and it is possible to communicate voice. As a result, usability can be improved and, if a pay-as-you-go system in which the communication fee depends on the communication time is adopted, the economic efficiency can be improved.

According to the wireless communication system of the present invention, in the wireless communication terminal, when the control means detects that the silent state has continued for a predetermined time or more, the control means determines that the silent state has continued for a predetermined time or more. Is transmitted to the communication network by wireless means, and when the communication network receives the message from the wireless communication terminal, the communication network is configured to transmit a wireless channel disconnection message to the wireless communication terminal. Upon receiving the wireless channel disconnection message from the communication network, the wireless communication terminal releases (disconnects) the communication channel.

Therefore, by releasing the communication channel that caused the silent state, if the communication channel is normally released, it is possible to prevent the silent state from continuing for a long time thereafter. Further, by making a new call, if the communication channel established by the new call is normal, voice can be communicated. As a result, the usability can be improved in the same manner as in the above-described claim 1, and if the communication rate is based on a pay-as-you-go system in which the communication fee depends on the communication time, economic efficiency can be improved. It is also possible to improve the performance.

According to a fifth aspect of the present invention, in the wireless communication terminal, when the control means detects that the silent state has continued for a predetermined time or more, the control means sends a message requesting release of the communication channel to the wireless means. The communication network is configured to transmit a wireless channel disconnection message to the wireless communication terminal upon receiving the message from the wireless communication terminal, and accordingly, the wireless communication terminal Upon receiving the wireless channel disconnection message from the network, the communication channel is released.

Therefore, in the same manner as in the above-mentioned claim 4, by releasing the communication channel causing the silence state, if the communication channel is normally released, the silence state will be maintained thereafter. It is possible to avoid continuing for a long time beforehand, and by making a new call, if the communication channel established by the new call is normal, voice can be communicated. As a result, usability can be improved and, if a pay-as-you-go system in which the communication fee depends on the communication time is adopted, the economic efficiency can be improved.

According to the wireless communication system of the sixth aspect, in the wireless communication terminal, the control means is configured to detect whether or not there is a silent state based on a quantization gain in speech coding. Since the quantization gain is a physical quantity calculated at the time of performing the speech coding process in the same manner as described in the above-described claim 2, it is necessary to separately detect whether or not there is a silent state. There is no need to calculate a new physical quantity, and it can be relatively easily detected whether or not the apparatus is in a silent state.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment in which the present invention is applied to a portable telephone terminal will be described with reference to FIG.
This will be described with reference to FIG. First, FIG. 1 schematically shows an electric functional block of a mobile phone terminal and a configuration of a network. In the mobile phone terminal 1, C
The PU 2 (control means in the present invention) is a wireless circuit 3 (wireless means in the present invention) for performing wireless processing, and a voice circuit for performing voice processing of a transmitted voice input by the microphone 4 and a received voice output by the receiver 5. 6. "Call start" key for starting a call, "Call end" for ending a call
Keys, a keypad 7 having a large number of keys such as "numeric" keys for inputting numbers "0" to "9", a display 8 for displaying various display information, and storing various storage information. Memory 9 to be connected.

In this case, the mobile phone terminal 1 is connected to the mobile phone network 1
Assuming that the mobile phone terminal 1 is located within the service area of the base station 11 in the communication network 0 (communication network according to the present invention), during communication, the mobile phone terminal 1 transmits a radio status report standardized by the Radio Industry Association. 2 is transmitted to the base station 11. When the base station 11 receives the message of the wireless status report 2 from the mobile phone 1, the base station 11 decodes the information element stored in the message of the wireless status report 2, thereby standardizing the information by the Radio Industry Association. The mobile phone terminal 1 transmits the message for specifying the switching destination wireless channel. Then, upon receiving the message specifying the switching destination wireless channel from the base station 11, the mobile phone terminal 1 switches the communication channel by decoding the information element stored in the message specifying the switching destination wireless channel. .

Next, the operation of the above configuration will be described with reference to FIG.
The description will be made with reference to FIG. In the mobile phone terminal 1, the CPU
2 detects whether or not there is a silent state by determining the value of the quantization gain in speech coding during communication. Now, if any trouble occurs in the communication channel and the silent state occurs due to the trouble, the CPU 2 detects that the value of the quantization gain in the speech coding has become extremely small. Then, a silence continuation monitoring timer for detecting the silence state and measuring the duration of the silence state is started.

When the CPU 2 detects that the silence continuation monitoring timer has timed out, the CPU 2 controls the transmission of the radio circuit 3 and transmits the message of the radio status report 2 to the cellular phone network 1.
0 is transmitted to the base station 11. In this case, the measurement time of the silence continuation monitoring timer, that is, the value at which the silence continuation monitoring timer times out is, for example, 10 seconds.

In the mobile telephone network 10, the base station 11
When the message of the wireless status report 2 is received from the mobile phone terminal 1, the information element stored in the message of the wireless status report 2 is decoded to transmit a message specifying the wireless channel to be switched to the mobile phone terminal 1. .

In the portable telephone terminal 1, the CPU
When receiving the message for specifying the wireless channel to be switched from the base station 11, the 2 switches the communication channel by decoding the information element stored in the message for specifying the wireless channel to be switched.

As described above, according to the first embodiment, when the portable telephone terminal 1 detects a silent state,
Since the silence continuation monitoring timer is started, and when it is detected that the silence continuation monitoring timer has timed out, the message of the wireless status report 2 is transmitted to the mobile phone network 10. Therefore, the mobile phone network 10 Receives the message of the wireless status report 2 from the mobile phone 1,
The mobile phone terminal 1 transmits a message for specifying the switching destination wireless channel, and switches the communication channel when receiving the message for specifying the switching destination wireless channel from the mobile phone network 10.

Therefore, by switching from the communication channel that caused the silent state to another communication channel, if the communication channel to be switched to is normal, the silent state will continue for a long time thereafter. Can be avoided beforehand, and voice can be communicated. As a result, usability can be improved, and if a pay-as-you-go system in which the communication fee depends on the communication time is adopted, the economic efficiency can be improved.

Also, in this case, the portable telephone terminal 1 is configured to detect whether or not there is a silent state on the basis of the quantization gain in speech coding. Since it is a physical quantity calculated when performing, it is not necessary to separately calculate a new physical quantity for detecting whether or not there is a silent state, and it is relatively easy to detect whether or not it is a silent state can do.

(Second Embodiment) Next, a second embodiment of the present invention will be described.
An embodiment will be described with reference to FIG. The description of the same parts as in the first embodiment is omitted, and different parts will be described below. In the above-described first embodiment, the base station 11 transmits a message for specifying the wireless channel to be switched to in response to receiving the message of the wireless status report 2 standardized by the Radio Industry Association from the mobile phone terminal 1. On the other hand, in the second embodiment, by defining a unique message in the mobile phone system, the base station 11 can change the mobile station from the mobile phone terminal 1 in the mobile phone system. It is configured to transmit a message designating a switching destination wireless channel in response to receiving a uniquely specified message.

That is, in the portable telephone system, a message of a silent state continuation notification is defined as a message notifying that the silent state in the portable telephone terminal 1 has continued for a predetermined time or more.

In this case, in the portable telephone terminal 1, when the CPU 2 detects that the silence continuation monitoring timer has timed out, the CPU 2 controls the transmission of the radio circuit 3, and transmits the radio status report described in the first embodiment. Instead of transmitting the message No. 2, the above-mentioned silent state continuation notification message is transmitted.

In the mobile telephone network 10, the base station 11
Upon receiving the silent state continuation notification message from the mobile phone terminal 1, the information element stored in the silent state continuation notification message is decoded to transmit the switch destination wireless channel designation message to the mobile phone terminal 1. .

Then, in the portable telephone terminal 1, the CPU
When receiving the message for specifying the wireless channel to be switched from the base station 11, the 2 switches the communication channel by decoding the information element stored in the message for specifying the wireless channel to be switched. The above-described message of the silent state continuation notification is used for communication using the control channel, and does not affect the communication channel.

As described above, according to the second embodiment, when the mobile phone terminal 1 detects a silent state,
The silence continuation monitoring timer is started, and when it is detected that the silence continuation monitoring timer has timed out, a message of a silent state continuation notification uniquely defined in the mobile phone system is transmitted to the mobile phone network 10, and the mobile phone network In FIG. 10, when the message of the silent state continuation notification is received from the mobile phone terminal 1, the mobile phone terminal 1 is configured to transmit the message for specifying the switching destination wireless channel. Upon receiving the message specifying the switching destination wireless channel, the communication channel is switched.

Therefore, in the same manner as in the first embodiment, by switching from the communication channel that caused the silence state to another communication channel, if the communication channel to be switched is normal, Thereafter, it is possible to prevent the silence state from continuing for a long time beforehand,
Audio can be communicated. As a result, usability can be improved, and if a pay-as-you-go system in which the communication fee depends on the communication time is adopted, the economic efficiency can be improved.

(Third Embodiment) Next, a third embodiment of the present invention will be described.
An embodiment will be described with reference to FIG. The description of the same parts as those in the second embodiment will be omitted, and different parts will be described below. In the above-described second embodiment, the base station 11 is configured to transmit the message for specifying the switching destination wireless channel in response to receiving the message of the silent state continuation notification from the mobile phone 1. On the other hand, in the third embodiment, in response to the fact that the base station 11 has received the silent state continuation notification message from the mobile phone terminal 1, the wireless channel disconnection message standardized by the Radio Industry Association is It is configured to transmit.

That is, in this case, when the base station 11 receives the message of the continuation notification of the silent state from the mobile telephone terminal 1 in the mobile telephone network 10, the base station 11 decodes the information element stored in the message of the continuation notification of the wireless state. By doing so, a wireless channel disconnection message is transmitted instead of transmitting the switching destination wireless channel designation message described in the second embodiment.

In the portable telephone terminal 1, the CPU
Upon receiving the radio channel disconnection message from the base station 11, the communication device 2 releases (disconnects) the communication channel by decoding the information element stored in the radio channel disconnection message.

As described above, according to the third embodiment, when the mobile phone terminal 1 detects a silent state,
The silence continuation monitoring timer is started, and when it is detected that the silence continuation monitoring timer has timed out, a message of a silent state continuation notification is transmitted to the mobile phone network 10, and the mobile phone terminal 1 continues the silent state in the mobile phone network 10. When the notification message is received, the wireless channel disconnection message is transmitted. Accordingly, when receiving the wireless channel disconnection message from the mobile phone network 10, the mobile phone terminal 1 releases the communication channel. Will do.

Therefore, by releasing the communication channel that has caused the silent state, if the communication channel is normally released, it is possible to prevent the silent state from continuing for a long time thereafter. Further, by making a new call, if the communication channel established by the new call is normal, voice can be communicated. As a result, the usability can be improved in the same manner as in the above-described first embodiment. Further, if the pay-as-you-go system in which the communication fee depends on the communication time is employed, the economic efficiency can be improved. Can also be achieved.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described.
An embodiment will be described with reference to FIG. The description of the same parts as in the third embodiment is omitted, and different parts will be described below. In the third embodiment described above, the base station 11 transmits a wireless channel disconnection message in response to receiving a message of a silent state continuation notification uniquely defined in the mobile phone system from the mobile phone terminal 1. On the other hand, in the fourth embodiment, by defining another message unique to the mobile phone system, the mobile phone terminal 1 is uniquely defined in the mobile phone system. In this configuration, a wireless channel disconnection message is transmitted in response to receiving another message.

That is, in the portable telephone system, the message requesting the release of the communication channel is:
Defines a message for wireless channel disconnection request.

In this case, in the portable telephone terminal 1, when the CPU 2 detects that the silence continuation monitoring timer has timed out, the CPU 2 controls the transmission of the radio circuit 3 to continue the silence state described in the third embodiment. Instead of transmitting the notification message, the above-mentioned wireless channel disconnection request message is transmitted.

In the mobile telephone network 10, the base station 11
When a message of a wireless channel disconnection request is received from the mobile phone terminal 1, a message of wireless channel disconnection is transmitted to the mobile phone terminal 1 by decoding an information element stored in the wireless channel disconnection request message.

Then, in the portable telephone terminal 1, the CPU
When the wireless channel disconnection message is received from the base station 11, the communication channel is released by decoding the information element stored in the wireless channel disconnection message. The message of the wireless channel disconnection request described above also communicates using the control channel, and does not affect the communication channel.

As described above, according to the fourth embodiment, when the portable telephone terminal 1 detects a silent state,
When the silence continuation monitoring timer is started and it is detected that the silence continuation monitoring timer has timed out, a message of a wireless channel disconnection request uniquely defined in the mobile phone system is transmitted to the mobile phone network 10, and the mobile phone network 10
In this configuration, when a message of a wireless channel disconnection request is received from the mobile phone terminal 1, a message of wireless channel disconnection is transmitted, and accordingly, the mobile phone terminal 1 disconnects the wireless channel from the mobile phone network 10. When the message is received, the communication channel is released.

Therefore, in the same manner as in the third embodiment described above, by releasing the communication channel that caused the silent state, if the communication channel is normally released, the silent state will continue for a long time thereafter. Continuation can be avoided beforehand, and by making a new call, if the communication channel established by the new call is normal, voice can be communicated. As a result, usability can be improved and, if a pay-as-you-go system in which the communication fee depends on the communication time is adopted, the economic efficiency can be improved.

(Other Embodiments) The present invention is not limited to the above embodiment, but can be modified or expanded as follows. The wireless communication terminal is not limited to the mobile phone terminal, and can transmit the message of the wireless status report 2 to the communication network, and can receive the message for specifying the switching destination wireless channel and the message of disconnecting the wireless channel from the communication network. Other things may be used.

The method of detecting the silent state is not limited to the method of determining the value of the quantization gain in speech coding, but may be another method. The measurement time of the silence continuation monitoring timer is
The value is not limited to 10 seconds, and may be another value, or a value that can be arbitrarily set according to a key operation on the keypad.

[Brief description of the drawings]

FIG. 1 schematically shows a first embodiment of the present invention.

FIG. 2 is a sequence diagram

FIG. 3 is a sequence diagram showing a second embodiment of the present invention.

FIG. 4 is a sequence diagram showing a third embodiment of the present invention.

FIG. 5 is a sequence diagram showing a fourth embodiment of the present invention.

[Explanation of symbols]

In the drawing, 1 is a mobile phone terminal (wireless communication terminal), 2 is a CP
U (control means), 3 is a wireless circuit (wireless means), 10 is a mobile telephone network (communication network).

Claims (6)

[Claims] 1. A wireless communication system comprising a control unit capable of switching a communication channel in response to a wireless unit receiving a message specifying a wireless channel to be switched from a communication network. In a wireless communication terminal that can be used in a wireless communication system including a communication network capable of transmitting a message for specifying a switching destination wireless channel in response to receiving a message, A wireless communication terminal, characterized in that when detecting the continuation, a message of a wireless status report 2 is transmitted to a communication network by the wireless means. 2. The wireless communication terminal according to claim 1, wherein said control means detects whether or not there is a silent state based on a quantization gain in speech coding. 3. A wireless communication system comprising a wireless communication terminal having a control unit capable of switching a communication channel in response to a wireless unit receiving a message specifying a wireless channel to be switched from a communication network. The control means of the wireless communication terminal, when detecting that the silent state continues for a predetermined time or more, causes the wireless means to transmit a message notifying that the silent state has continued for a predetermined time or more to the communication network. The communication system according to claim 1, wherein the communication network transmits a message for specifying a switching destination wireless channel to the wireless communication terminal in response to receiving the message from the wireless communication terminal. 4. A radio communication system comprising a radio communication terminal having a control means capable of releasing a communication channel in response to a radio channel disconnection message being received from a communication network by a radio means. The control means of the communication terminal, when detecting that the silent state has continued for a predetermined time or more, causes the wireless means to transmit a message notifying that the silent state has continued for the predetermined time or more to the communication network, The wireless communication system, wherein the network transmits a wireless channel disconnection message to the wireless communication terminal in response to receiving the message from the wireless communication terminal. 5. A wireless communication system comprising a wireless communication terminal having control means capable of releasing a communication channel in response to a wireless channel disconnection message being received from a communication network by a wireless means. The control means of the communication terminal, when detecting that the silent state continues for a predetermined time or more, causes the wireless means to transmit a message requesting release of the communication channel to the communication network, and the communication network receives the message from the wireless communication terminal. A wireless communication system for transmitting a wireless channel disconnection message to a wireless communication terminal in response to receiving the message. 6. The wireless communication terminal according to claim 3, wherein the control unit detects whether or not there is a silent state based on a quantization gain in voice coding. Wireless communication system.