JPH11187451A - Portable telephone system selected among plural systems - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the changeover during a speech into other mobile communication system than a mobile communication system at a call connection destination in a mobile communication composite terminal. SOLUTION: A mobile communication composite terminal is provided with a reception electric field level detector 10, corresponding to a frequency range of each mobile communication system. A control section 20 controls the reception electric field level detector 10, based on channel data stored in a storage device 30 for detecting a reception electric field strength level of a received frequency channel received through an antenna section 1. A comparator 40 compares the detected reception electric field strength level a threshold level of the speech available electric field strength level stored in the storage device 30 and sends speech available frequency channel information to a base station through an RF section. The base station grasps the reception state for each system of the mobile communication composite terminal by repeating this sequence for all channels. Thus, the changeover during a speech to mobile communication systems other than the mobile communication system of the call connection destination is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone system capable of switching between a plurality of systems, and more particularly to a mobile communication system including a mobile communication multi-terminal capable of switching to another communication system even during a call. .

[0002]

2. Description of the Related Art A mobile communication terminal such as a cellular phone can normally communicate with only one communication system. However, since it is inconvenient to carry a plurality of mobile communication terminals when using a plurality of communication systems, a mobile communication multi-terminal capable of using a plurality of communication systems by itself has been used. Was. An example of such a mobile communication terminal is disclosed in Japanese Patent Application Laid-Open No. Hei 9-136450.

In a conventional mobile communication complex terminal having a function of transmitting and receiving to and from two different mobile communication systems,
A predetermined first system of the two mobile communication systems is set in a reception standby state, and it is checked whether or not registration of the mobile communication system with a base station is possible. If registration is possible, the registration is performed. The first system waits for reception. If the result of the check indicates that registration with the first system is not possible, registration with the second system different from the first system is performed by the automatic switching control means to switch the mobile communication system.

[0004]

However, according to the switching method in the above-described conventional mobile communication complex terminal, switching to a different mobile communication system can be performed only during reception standby, and different mobile communication systems during a call. There was a problem that switching to the system was not possible.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a mobile communication terminal capable of easily switching during a call to a mobile communication system other than the mobile communication system to which the call is connected. I do.

[0006]

According to the present invention, in order to solve the above-mentioned problems, a mobile communication complex terminal is provided with all of the frequency channels within the radio communication frequency range of all systems corresponding to the mobile communication complex terminal. A receiving electric field level detecting device for detecting a receiving electric field level, storage means for storing information on frequency channels of all systems, and control for controlling the receiving electric field level detecting device to constantly detect and monitor the receiving electric field levels of all frequency channels Unit.

[0007] With this configuration, the channel of the frequency of the received electric field level is reported to the base station in the communication system, and the call is switched to another mobile communication system other than the mobile communication system to which the call is connected. To make it easier.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION
In a mobile communication complex terminal corresponding to a plurality of mobile communication systems, a reception field level detection device for detecting a reception field level of all frequency channels within a radio communication frequency range of an entire mobile communication system corresponding to the mobile communication complex terminal. A mobile communication multi-terminal comprising a storage unit for storing information on the all frequency channels, and a control unit for controlling the reception electric field level detecting device to constantly detect and monitor the reception electric field levels of the all frequency channels. There is an effect that it is possible to notify a base station of a reception electric field level, a reception frequency channel, and the like necessary for switching to another mobile communication system.

[0009] The invention described in claim 2 of the present invention is claim 1.
The mobile communication multi-terminal according to claim 1, wherein a transmission frequency channel assigned for control of the mobile communication system or a transmission frequency channel that the mobile communication multi-terminal can freely use as an application or control of the mobile communication system. The reception electric field level detected by the reception electric field level detecting device is used for the first reception using the transmission data area given for the transmission or the transmission data area that the mobile communication multi-terminal can freely use as an application. The mobile communication system is provided with means for notifying the mobile communication system base station as frequency channel information, and has an effect of providing information enabling switching to another mobile communication system.

The third aspect of the present invention is the first aspect of the present invention.
In the mobile communication complex terminal described in the above, a storage device for storing a threshold value of a reception electric field level at which communication is possible, which is determined for each mobile communication system, and a reception electric field level detected by the reception electric field level detection device. A comparison means for comparing the threshold value with a threshold value, and a means for judging, based on the comparison result of the comparison means, that the received reception frequency channel is at a reception electric field level at which communication is possible. This has the effect that it is possible to notify the base station and the control management station of the reception frequency channel and the reception electric field level that can be used for communication when switching to the communication system.

The invention according to claim 4 of the present invention is the invention according to claim 3.
The mobile communication multi-terminal according to claim 1, wherein a transmission frequency channel assigned for control of the mobile communication system or a transmission frequency channel that the mobile communication multi-terminal can freely use as an application or control of the mobile communication system. Using the transmission data area assigned for use or the transmission data area that can be freely used by the mobile communication complex terminal as an application, the reception electric field level determined to be callable is used as second reception frequency channel information. The mobile communication system is provided with a means for informing the base station of the mobile communication system, and has an effect of providing information that enables call switching to another mobile communication system.

The fifth aspect of the present invention is the third aspect of the present invention.
Means for relatively comparing the strength of a received electric field level with respect to said second reception frequency channel information to rank the second reception frequency channel information, and receiving relative to a base station of a mobile communication system. Means for preferentially notifying a frequency channel having a large electric field level, and has an effect that a frequency channel having a large received electric field level can be preferentially notified to a mobile communication system base station.

The invention according to claim 6 of the present invention is the invention according to claim 3.
The mobile communication multi-functional terminal according to claim 1, further comprising: a storage device for storing call charge data of said plurality of mobile communication systems; and adding said call charge data to each reception frequency channel in said second reception frequency channel information. Means for assigning a priority according to the call rate data, and means for notifying the second reception frequency channel information to a mobile communication system base station according to the priority. Thus, the notification can be performed according to the priority order.

The invention according to claim 7 of the present invention is the invention according to claim 3.
The mobile communication multi-terminal according to claim 1, further comprising: a storage device for storing communication speed data of a plurality of mobile communication systems; and adding the communication speed data to each of the reception frequency channels in the second reception frequency channel information. Means for assigning priorities in accordance with the communication speed data, and means for informing the mobile communication system base station of the second reception frequency channel information in accordance with the priorities. Thus, the notification can be performed according to the priority order.

The invention according to claim 8 of the present invention is the invention according to claim 3.
A storage device for storing maximum transmission power specification value data of a plurality of mobile communication systems, wherein the maximum transmission power specification is provided for each reception frequency channel in the second reception frequency channel information. Means for adding value data and prioritizing according to the maximum transmission power specification value data, and means for notifying the second receiving frequency channel information to a mobile communication system base station according to the priority. There is an effect that the mobile communication system base station can be notified according to the priority order.

The ninth aspect of the present invention is the third aspect of the present invention.
Means for allowing a user to arbitrarily select one of the reception electric field level, the call charge data, the communication speed data, and the maximum transmission power specification value data, and the selected data. Means for assigning a priority based on the priority, and means for notifying the second reception frequency channel information to a mobile communication system base station in accordance with the priority, so that a reference for the priority can be selected. It has the action of:

According to a tenth aspect of the present invention, in the mobile communication multi-terminal according to the third aspect, the reception electric field level, the call charge data, the communication speed data, and the maximum transmission power standard value data are included. Means for the user to arbitrarily select one of the following at the time of a call or standby, means for assigning a priority based on the selected data, and mobile communication of the second reception frequency channel information according to the priority. Means for notifying the system base station, and has the effect of making it possible to select the priority order.

[0018] According to an eleventh aspect of the present invention, in the mobile communication multi-terminal according to the third aspect, a mobile communication system corresponding to the received electric field level determined to be capable of talking and a mobile station connected to the call. Means for displaying a communication charge of the communication system; and means for arbitrarily selecting a mobile communication system desired by a user based on the displayed call charge. This has the effect of enabling the system to be selected.

According to a twelfth aspect of the present invention, in the mobile communication multi-terminal according to the fifth, sixth, seventh and eighth aspects, means for realizing a mute state during switching to another mobile communication system, It is provided with voice message output means and display means, and has an effect of preventing noise during switching.

According to a thirteenth aspect of the present invention, in the mobile communication multi-terminal according to the third aspect, means for displaying a total call charge is provided, so that the call charge can be known. Has an action.

According to a fourteenth aspect of the present invention, the first reception frequency channel information transmitted from the mobile communication multi-terminal according to the second aspect is received and received by the mobile communication multi-terminal. A mobile communication system base station comprising means for detecting a reception electric field level of a frequency channel,
It has the function of constantly recognizing and monitoring the reception status of the mobile communication multifunction terminal.

According to a fifteenth aspect of the present invention, the second mobile communication terminal receives the second reception frequency channel information transmitted from the mobile communication multiple terminal according to the fourth aspect and receives the second reception frequency channel information. A mobile communication system base station having means for detecting a level of a receiving electric field capable of talking, wherein the mobile communication complex terminal constantly recognizes and monitors a receiving electric field level and a receiving frequency channel capable of talking. Having.

According to a sixteenth aspect of the present invention, in the base station of the mobile communication system according to the fourteenth aspect, a storage device for storing a threshold value of a reception electric field level at which communication is possible, which is defined for each mobile communication system. And comparing means for comparing the first reception frequency information received from the mobile communication multi-terminal with the threshold value of the reception electric field level; and the mobile communication multi-terminal receiving from the comparison result in the comparison means. Means for discriminating that the received reception frequency channel is at a reception electric field level at which communication is possible and using the received reception frequency channel as third reception frequency channel information. It has the effect of reducing.

According to a seventeenth aspect of the present invention, in the mobile communication system base station according to the fifteenth or sixteenth aspect, it is determined whether a reception frequency channel of a reception electric field level determined to be communicable is usable by another mobile station. It is provided with means for coordinating with a communication system base station, and has an effect that it can be reserved as a communication channel of a mobile communication complex terminal when it can be used for a call.

[0025] The invention according to claim 18 of the present invention provides a mobile communication base station according to claims 15, 16 and 17 which broadcasts from the mobile communication complex terminal according to claims 5, 6, 7, 8 and 11. A means for notifying a switching request to a mobile communication system base station to be switched based on the received reception frequency channel is provided, and has an effect of requesting channel switching.

According to a nineteenth aspect of the present invention, in the mobile communication system base station according to the fourteenth or fifteenth aspect, there is provided means for transmitting call charge data to the mobile communication multi-terminal. It has the effect of making it possible to know the call charge.

According to a twentieth aspect of the present invention, in the mobile communication system base station according to the fourteenth and fifteenth aspects, when switching to another mobile communication system, mute data or voice message data is transmitted to the mobile communication complex terminal. Is provided, and has the effect of preventing noise during switching.

According to a twenty-first aspect of the present invention, in the mobile communication system base station according to the sixteenth or seventeenth aspect, the third reception frequency channel information is compared with the reception electric field level relatively. Means for ranking
Means for preferentially notifying a frequency channel having a relatively high reception electric field level to the mobile communication multi-terminal, and a frequency having a relatively high reception electric field level to the mobile communication multi-terminal. This has the effect that the channel can be broadcasted preferentially.

According to a twenty-second aspect of the present invention, in the mobile communication system base station according to the sixteenth or seventeenth aspect, a storage device for storing call charge data of a plurality of mobile communication systems, and the third reception frequency channel Means for adding the call charge data to each reception frequency channel in the information and prioritizing according to the call charge data, and transmitting the third reception frequency channel information according to the priority order to the mobile communication multi-terminal. And a means for notifying the mobile communication multi-function terminal according to the priority.

According to a twenty-third aspect of the present invention, in the mobile communication system base station according to the sixteenth or seventeenth aspect, a storage device for storing communication speed data of a plurality of mobile communication systems, and the third reception frequency channel Means for adding the communication speed data to each reception frequency channel in the information and prioritizing according to the communication speed data, and transmitting the third reception frequency channel information according to the priority order to the mobile communication multi-terminal. And a means for notifying the mobile communication multi-function terminal according to the priority.

According to a twenty-fourth aspect of the present invention, in the mobile communication system base station according to the sixteenth or seventeenth aspect, a storage device for storing maximum transmission power standard value data of a plurality of mobile communication systems; Means for adding the maximum transmission power standard value data to each of the reception frequency channels in the reception frequency channel information and for prioritizing according to the maximum transmission power standard value data; Means for informing the mobile communication multi-function terminal of the frequency channel information, and has an effect of notifying the mobile communication multi-function terminal according to the priority.

According to a twenty-fifth aspect of the present invention, in the mobile communication system management station according to the sixteenth or seventeenth aspect, the reception electric field level, the call charge data, the communication speed data, and the maximum transmission power specification value data are provided. Means for arbitrarily selecting one of the above, means for prioritizing based on the selected data, and means for informing the mobile communication multi-function terminal of the priority. This has the effect of notifying the communication composite terminal of the priority.

According to a twenty-sixth aspect of the present invention, in the mobile communication system base station according to the sixteenth or the seventeenth aspect, the reception electric field level, the call charge data, the communication speed data, and the maximum transmission power standard value data. Means for arbitrarily selecting one of them during a call or standby, means for prioritizing based on the selected data, and system switching for the mobile communication multi-terminal according to the priority. Means for notifying the presence / absence is provided, and has the effect of notifying the mobile communication multifunction terminal of the presence / absence of system switching in accordance with the priority order.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described in detail with reference to FIGS.

(First Embodiment) In a first embodiment of the present invention, a mobile communication complex terminal is provided with a reception electric field level detecting device, and a mobile communication system base station determines the reception electric field level of the terminal. This is a mobile phone system provided with a value comparison device.

FIG. 1 is a block diagram of a mobile communication complex terminal (mobile device) and a mobile communication system base station according to the first embodiment of the present invention. FIG. 2 is a block diagram of the reception electric field level detection device according to the first embodiment.
FIG. 3 is a flowchart of a process of detecting the received electric field level and comparing the detected electric field level with a threshold value according to the first embodiment.

On the mobile device side of FIG.
It is a transmission / reception shared antenna that receives radio waves from the base station and transmits the same to the base station. Received electric field level detector
Reference numeral 10 denotes a circuit for detecting a reception electric field level of a frequency channel of each mobile communication system. The control unit 20 is a circuit that controls each circuit of the mobile device. The storage device 30 is a storage device that stores channel data of all frequency channels and the like. The display unit 50 is a display device that displays various data. The input unit 60 is a keyboard for inputting telephone numbers and operation information. The transmitting unit 70 is a circuit that transmits the modulated data. The receiving unit 80 is a circuit that converts the frequency of the received signal and detects it. The modulation / demodulation / coding / decoding unit 90 is a circuit that encodes and modulates transmission data and demodulates and decodes reception data. Transmitter
The RF unit is composed of the 70, the receiving unit 80, and the modulation / demodulation / coding / decoding unit 90.

On the base station side in FIG.
Is a transmission / reception shared antenna that receives radio waves from the mobile device and transmits radio waves to the mobile device. The control unit 120
It is a circuit that controls each circuit of the base station. Storage device 130
Is a storage device for storing a threshold value S of a reception electric field level at which communication can be performed, which is determined for each system. The comparison device 140 is a circuit that compares the reception electric field level with a threshold value stored in advance. Transmitting section 170 is a circuit that transmits the modulated data. The receiving unit 180 is a circuit that converts the frequency of the received signal and detects it. The modulation / demodulation / coding / decoding unit 190 is a circuit that encodes and modulates transmission data and demodulates and decodes reception data. The transmission section 170, the reception section 180, and the modulation / demodulation / coding / decoding section 190 constitute an RF section.

Although the base station of the mobile communication system may be integrated with the case where the base station is divided into the transmitting / receiving base station and the control management station, in this specification, the base station and the control management station are connected in any case. Collectively, they are called base stations.

In FIG. 2, a BPF 11 is a band-pass filter for limiting a band of a received signal. Amplifier 12
This is an amplifier that amplifies a received signal to a predetermined level. The mixer 13 is a frequency converter that down-converts a received signal into an IF band. The BPF 14 is a band-pass filter that limits the band of the received IF signal. The detection unit 15 receives the
This is a detection circuit that performs envelope detection on the F signal to generate a DC voltage. Local oscillator 16 is a circuit that generates a high-frequency signal for frequency conversion based on frequency channel data.
The A / D converter 17 is a circuit that converts the detection output signal into digital data.

The operation of the mobile phone system according to the first embodiment will be described with reference to FIGS. It is assumed that there are a system A, a system B, and a system C as mobile communication systems that can be supported by the mobile communication complex terminal. During a call, the reception electric field level detecting device 10 detects the reception electric field levels of the frequency channels of the system B and the system C at all times. The received electric field levels of all frequency channels within the wireless communication frequency range of all corresponding systems are detected. That is, the control unit 20 controls the reception electric field level detection device 10 to constantly detect and monitor the reception electric field levels of all the frequency channels within the frequency range.

A specific procedure for detecting the received electric field level and comparing the detected electric field level with the threshold value will be described with reference to the flowchart of FIG. Channel data of all frequency channels of the system A, the system B, and the system C are stored in the storage device 30 in advance. As a first step, the control unit 20 reads the channel data Dn of the frequency channel n (n = 1, 2,... N, N is the number of all frequency channels of the system B and the system C) from the storage device 30, The frequency of the local oscillator 16 of the reception electric field level detecting device 10 shown in FIG.
Set according to the frequency of As a second step, the received signal is down-converted to the IF band by the mixer 13 of the received electric field level detecting device 10, envelope-detected by the detection unit 15 to be a DC voltage, and converted into digital data by the A / D converter 17. The reception electric field level Pn of the frequency channel n is detected. The first step and the second step are repeated N times to detect the reception electric field levels of all the frequency channels.

As a third step, the detected reception electric field level Pn and the frequency channel n are used as the first reception frequency channel information, and the transmission frequency channel assigned for controlling the mobile communication system or the terminal side is used as an application. Using a transmission frequency channel that can be used freely, a transmission data area assigned for controlling the mobile communication system, or a transmission data area that can be used freely by the terminal side as an application, the mobile communication system base station Notify.

The mobile communication system base station receives the first reception frequency channel information transmitted from the mobile communication multi-terminal, and detects the reception electric field level of the frequency channel received by the mobile communication multi-terminal. The storage device 30 stores a threshold value of a reception electric field level at which communication is possible, which is defined for each mobile communication system.

As a fourth step, in the base station of the mobile communication system, the reception electric field level Pn in the broadcasted first reception frequency channel information and the system predetermined in the storage device 130 are determined in advance. The comparison device 140 compares the threshold value S of the reception electric field level at which communication is possible. From the comparison result, it is determined whether or not the reception frequency channel being received by the mobile communication multi-function terminal has a reception electric field level at which communication is possible. The reception electric field level at which communication is possible is defined as third reception frequency channel information.

As a result of comparison by the comparison device 140, when the reception electric field level Pn is larger than the threshold value S (Pn ≧
In S), as a fifth step, the received electric field level Pn and the frequency channel n are notified to the base station of the mobile communication system (for example, system B) corresponding to the frequency channel n in the first received frequency channel information. Then, it is checked whether the corresponding frequency channel n has a free space. That is, it is coordinated with another mobile communication system base station whether the reception frequency channel of the reception electric field level determined to be capable of talking is usable. If there is a vacancy in the channel desired to switch, based on the received frequency channel broadcast from the mobile communication multi-terminal, based on the switching request to the mobile communication system base station to be switched, to notify the switching request, Performs system switching.

Next, the function of the base station when switching the mobile communication system will be described. The base station ranks the third reception frequency channel information by relatively comparing the strength of the reception electric field level. Also, the mobile communication base station stores call charge data, communication speed data, and maximum transmission power standard value data of each mobile communication system, and stores these data in each reception frequency in the third reception frequency channel information. Channels are added, and ranking is performed based on these data.

The base station arbitrarily selects these orders, and notifies the mobile communication multi-terminal of the priority and whether or not the system can be switched at each time of a call or a standby. For example, when the order of the reception electric field level is selected, a frequency channel having a relatively high reception electric field level is preferentially notified as a switching channel.

When switching to another mobile communication system, the base station sends mute data or voice message data to the mobile communication complex terminal. It also sends call charge data to the mobile communication complex terminal.

As described above, in the first embodiment of the present invention, the mobile station is provided with the reception electric field level detection device, and the base station is provided with the comparison device. The reception electric field level of the frequency channel of the system is detected, the result of the comparison with the threshold value of the reception electric field level at which communication can be performed for each mobile communication system is reported to the system, and the system can be switched during the communication.

(Second Embodiment) In a second embodiment of the present invention, a mobile phone system is provided with a receiving electric field level detecting device and a comparing device for comparing a receiving electric field level with a threshold value on the mobile device side. It is.

FIG. 4 is a block diagram of a mobile communication complex terminal (mobile device) and a mobile communication system base station according to the second embodiment of the present invention. FIG. 5 is a flowchart of a process of detecting a received electric field level and comparing the detected electric field level with a threshold value according to the second embodiment. On the mobile device side in FIG.
The comparison device 40 is a circuit that compares the received electric field level with a threshold value stored in advance. Received electric field level detector 10
Is the circuit shown in FIG. Other circuits are the same as those in the first embodiment. The base station in FIG. 4 is the same as the first embodiment except that there is no comparison device.

The operation of the mobile phone system according to the second embodiment will be described with reference to FIGS. It is assumed that there are a system A, a system B, and a system C as mobile communication systems that can be supported by the mobile communication complex terminal. During a call, the reception electric field level detecting device 10 detects the reception electric field levels of the frequency channels of the system B and the system C at all times.

A specific procedure for detecting the received electric field level and comparing the detected electric field level with the threshold value will be described with reference to the flowchart of FIG. Channel data of all frequency channels of the system A, the system B, and the system C are stored in the storage device 30 in advance. As a first step, the control unit 20 reads out channel data Dn of frequency channel n (n = 1, 2,... N, where N is the number of all frequency channels of system B and system C), and is shown in FIG. Received electric field level detector 10
Is set in accordance with the frequency of the channel n. As a second step, the received signal is down-converted to the IF band by the mixer 13 of the received electric field level detecting device 10, and is envelope-detected by the detection unit 15 to be a DC voltage.
The converter 17 detects the received electric field level Pn of the frequency channel n as digital data. The first step and the second step are repeated N times to detect the reception electric field levels of all the frequency channels.

The threshold value of the reception electric field level at which communication is possible, which is determined for each mobile communication system, is stored in the storage device 30. As a third step, the comparison device 40 compares the detected reception electric field level Pn with a threshold value S of the communication reception electric field level which is stored in the storage device 30 and is predetermined for each system. I do. Based on the comparison result,
It is determined whether or not the received reception frequency channel has a reception electric field level at which communication is possible.

As a result of comparison by the comparison device 40, when the reception electric field level Pn is larger than the threshold value S (Pn ≧ Pn)
In S), as a fourth step, the reception electric field level Pn, the frequency channel n, and the system name (for example, system B) to which the frequency channel n corresponds are used as the second reception frequency channel information for controlling the mobile communication system. The assigned transmission frequency channel or the transmission frequency channel that the terminal side can freely use as an application, or the transmission data area assigned for control of the mobile communication system or the transmission data area that the terminal side can freely use as an application. To notify the mobile communication system base station. At this time, with respect to the second reception frequency channel information, the relative strength of the reception electric field level is relatively compared and prioritized, and the frequency channel having the relatively high reception electric field level is preferentially notified.

The base station of the mobile communication system receives the second reception frequency channel information transmitted from the mobile communication multi-terminal, and detects the level of the reception electric field at which the mobile communication multi-terminal can receive a call. As a fifth step, the base station reports the received electric field level Pn and the frequency channel n in the reported second received frequency channel information to the base station of the system B, and determines whether there is a free space in the corresponding frequency channel n. Check. That is, it is coordinated with another mobile communication system base station to determine whether or not a reception frequency channel of a communicable level can be used. If there is a vacancy in the channel desired to switch, based on the received frequency channel broadcast from the mobile communication multi-terminal, based on the switching request to the mobile communication system base station to be switched, to notify the switching request,
Performs system switching.

Next, the function of the terminal at the time of switching the mobile communication system will be described. The terminal compares and ranks the level of the received electric field with respect to the second reception frequency channel information. In addition, the terminal stores call charge data, communication speed data, and maximum transmission power standard value data of each mobile communication system, and stores these data in each reception frequency channel in the second reception frequency channel information. In addition, ranking is performed based on these data. At the time of a call or standby, these orders are arbitrarily selected and the base station is notified of the frequency channels according to the priorities. For example, when the order of the reception electric field level is selected, a frequency channel having a relatively high reception electric field level is preferentially notified as a switching channel.

On the terminal, the call charges of the mobile communication system corresponding to the second reception frequency channel information and the mobile communication system connected to the call are displayed, and based on the display, the mobile communication system desired by the user is displayed. It can be arbitrarily selected.

During switching to another mobile communication system, a mute state is set. A voice message may be output or a text message may be displayed. The terminal can also display the total call charge.

As described above, according to the second embodiment of the present invention, the receiving field level detecting device and the comparing device are provided on the mobile device side. By detecting the level and comparing and discriminating the result of the comparison with the threshold value of the reception electric field level at which communication can be performed for each mobile communication system to the mobile communication system, the system can be switched during the communication.

[0062]

As described above, according to the present invention, the mobile communication multi-terminal is provided with the received electric field level detecting device, the control unit, and the storage device corresponding to a plurality of mobile communication systems. The effect of being able to detect the received electric field level of the frequency channel of the mobile communication system described above is obtained.

Further, according to the present invention, a comparison device for comparing and discriminating a detected reception electric field level with a threshold value of a reception electric field level at which communication is possible for each mobile communication system is provided to a mobile communication complex terminal or a base station of a mobile communication system. Is provided, it is possible to notify the mobile communication system of the frequency channel determined to be the reception electric field level at which communication is possible, and to switch the mobile communication system during communication.

[Brief description of the drawings]

FIG. 1 is a block diagram of a mobile communication combined terminal and a mobile communication system base station according to a first embodiment of the present invention;

FIG. 2 is a block diagram of a reception electric field level detection device according to the first embodiment of the present invention;

FIG. 3 is a flowchart of a process of detecting a reception electric field level and comparing it with a threshold according to the first embodiment of the present invention;

FIG. 4 is a block diagram of a mobile communication complex terminal and a mobile communication system base station according to a second embodiment of the present invention;

FIG. 5 is a flowchart of a process of detecting a reception electric field level and comparing and determining the reception electric field level with a threshold value according to the second embodiment of the present invention.

[Explanation of symbols]

 1, 101 antenna 10 reception electric field level detection device 11, 14 BPF 12 amplifier 13 mixer 15 detection unit 16 local oscillator 17 A / D converter 20, 120 control unit 30, 130 storage device 40, 140 comparison device 50 display unit 60 input Section 70, 170 Transmitting section 80, 180 Receiving section 90, 190 Modulation / decoding / coding / decoding section

Continuing on the front page (72) Inventor Shinichi Sato 2-5-5 Meidori, Izumi-ku, Sendai City, Miyagi Prefecture Inside Matsushita Communication Sendai Research Laboratories Co., Ltd. Matsushita Communication Sendai Laboratory Co., Ltd.

Claims (26)

[Claims] 1. A mobile communication complex terminal corresponding to a plurality of mobile communication systems, the reception detecting a reception electric field level of all frequency channels within a radio communication frequency range of the whole mobile communication system corresponding to the mobile communication complex terminal. An electric field level detection device, storage means for storing information on the all frequency channels, and a control unit for controlling the reception electric field level detection device and constantly detecting and monitoring the reception electric field levels of the all frequency channels. A mobile communication composite terminal characterized by the following. 2. A transmission frequency channel provided for controlling the mobile communication system or a transmission frequency channel which can be freely used as an application by the mobile communication multi-terminal, or provided for controlling the mobile communication system. Using the data area for transmission or the data area for transmission that can be freely used by the mobile communication complex terminal as an application, the reception electric field level detected by the reception electric field level detecting device is used as first reception frequency channel information. 2. The mobile communication multi-function terminal according to claim 1, further comprising means for notifying the mobile communication system base station. 3. A storage device for storing a threshold value of a reception electric field level at which communication is possible, which is determined for each mobile communication system, and a reception electric field level detected by the reception electric field level detection device and the threshold value. 2. The mobile device according to claim 1, further comprising: comparing means for comparing, and means for judging, based on a result of the comparison, that the received reception frequency channel has a reception electric field level at which communication is possible. Communication complex terminal. 4. A transmission frequency channel provided for controlling the mobile communication system or a transmission frequency channel which can be freely used as an application by the mobile communication multi-terminal, or provided for controlling the mobile communication system. The mobile communication system base station uses, as the second reception frequency channel information, the reception electric field level determined to be capable of communication using the transmission data area that is being used or the transmission data area that can be freely used by the mobile communication multi-terminal as an application. 4. The mobile communication multi-function terminal according to claim 3, further comprising means for informing a station. 5. A means for relatively comparing the strength of the received electric field level with respect to the second received frequency channel information and ranking the received electric field level, and the received electric field level being relatively large relative to the base station of the mobile communication system. 4. The mobile communication multi-function terminal according to claim 3, further comprising means for giving priority to the frequency channel. 6. A storage device for storing call charge data of said plurality of mobile communication systems, said call charge data being added to each reception frequency channel in said second reception frequency channel information, and said call charge data being added. And means for notifying said second reception frequency channel information to a mobile communication system base station according to said priority.
The mobile communication multifunction terminal according to the above. 7. A storage device for storing communication speed data of a plurality of mobile communication systems, wherein said communication speed data is added to each reception frequency channel in said second reception frequency channel information and said communication speed data is added. 4. The mobile communication multi-terminal according to claim 3, further comprising: means for assigning a priority according to the following: and means for notifying the second reception frequency channel information to a mobile communication system base station according to the priority. . 8. A storage device for storing maximum transmission power specification value data of a plurality of mobile communication systems, and adding the maximum transmission power specification value data to each reception frequency channel in the second reception frequency channel information. And means for prioritizing according to the maximum transmission power specification value data, and means for notifying the second receiving frequency channel information to a mobile communication system base station according to the priority. Item 3. The mobile communication composite terminal according to Item 3. 9. A means by which a user can arbitrarily select one of the reception electric field level, the call charge data, the communication speed data, and the maximum transmission power standard value data, and a priority is given based on the selected data. 4. The mobile communication multi-function terminal according to claim 3, further comprising: means for assigning an order, and means for notifying said second reception frequency channel information to a mobile communication system base station according to said priority. 10. A means by which a user can arbitrarily select one of the reception electric field level, the call charge data, the communication speed data, and the maximum transmission power standard value data at the time of a call or at each standby time, 4. The mobile communication system according to claim 3, further comprising: means for assigning a priority based on the selected data; and means for notifying the second reception frequency channel information to a mobile communication system base station according to the priority. Mobile communication complex terminal. 11. A means for displaying a call charge of a mobile communication system corresponding to the received electric field level determined to be callable and a mobile communication system connected to the call, and using the call charge based on the displayed call charge. 4. The mobile communication multi-function terminal according to claim 3, further comprising means for allowing a user to arbitrarily select a desired mobile communication system. 12. The apparatus according to claim 5, further comprising: means for realizing a mute state during switching to another mobile communication system; voice message output means; and display means. Mobile communication complex terminal. 13. The mobile communication multi-function terminal according to claim 3, further comprising means for displaying a total call charge. 14. The mobile communication multi-terminal according to claim 2, wherein the first reception frequency channel information transmitted from the mobile communication multi-terminal is received, and a reception electric field level of a frequency channel received by the mobile communication multi-terminal is detected. A base station for a mobile communication system, comprising: 15. The mobile communication multi-terminal according to claim 4, wherein the second reception frequency channel information transmitted from the mobile communication multi-terminal is received, and a reception electric field level at which the mobile communication multi-terminal can receive a call is detected. A base station for a mobile communication system, comprising: 16. A storage device for storing a threshold value of a reception electric field level at which communication is possible, which is determined for each mobile communication system, the first reception frequency information received from a mobile communication multi-terminal, and the reception electric field level. Comparing means for comparing the reception frequency channel received by the mobile communication multi-terminal with the reception electric field level at which communication can be performed, based on the comparison result obtained by the comparison means. 15. The mobile communication system base station according to claim 14, further comprising: means for setting frequency channel information. 17. The mobile communication system according to claim 15, further comprising means for adjusting with a base station of another mobile communication system whether or not a reception frequency channel of a reception electric field level determined to be capable of communication is usable. Mobile communication system base station. 18. A switching request is sent to a mobile communication system base station to be switched based on a reception frequency channel notified from the mobile communication multi-terminal according to claim 5, 6, 7, 8, or 11. 18. The mobile communication system base station according to claim 15, wherein a base station is provided. 19. The mobile communication system base station according to claim 14, further comprising means for transmitting call charge data to the mobile communication multifunction terminal. 20. The mobile communication system base according to claim 14, further comprising means for transmitting mute data or voice message data to the mobile communication multi-terminal when switching to another mobile communication system. Bureau. 21. A means for relatively comparing the strength of the reception electric field level with respect to the third reception frequency channel information to rank the reception electric field level, 16. A means for preferentially broadcasting a large frequency channel.
8. The mobile communication system base station according to 7. 22. A storage device for storing call charge data of a plurality of mobile communication systems, wherein said call charge data is added to each reception frequency channel in said third reception frequency channel information, and said call charge data is added. 17. A device according to claim 16, further comprising: means for assigning a priority according to the following, and means for notifying said mobile communication terminal of said third reception frequency channel information according to said priority.
18. The mobile communication system base station according to claim 17. 23. A storage device for storing communication speed data of a plurality of mobile communication systems, wherein said communication speed data is added to each reception frequency channel in said third reception frequency channel information, and said communication speed data is added. 17. A device according to claim 16, further comprising: means for assigning a priority according to the following, and means for notifying said mobile communication terminal of said third reception frequency channel information according to said priority.
18. The mobile communication system base station according to claim 17. 24. A storage device for storing maximum transmission power specification value data of a plurality of mobile communication systems, and adding the maximum transmission power specification value data to each reception frequency channel in the third reception frequency channel information. And means for prioritizing according to the maximum transmission power specification value data, and means for informing the mobile communication multi-terminal of the third reception frequency channel information according to the priority. Item 18. The mobile communication system base station according to item 16 or 17. 25. A means for arbitrarily selecting one of the reception electric field level, the call charge data, the communication speed data, and the maximum transmission power standard value data, and assigning a priority order based on the selected data. 18. The base station according to claim 16, further comprising: means for transmitting the priority to a mobile communication multi-function terminal. 26. A means for arbitrarily selecting one of the reception electric field level, the call charge data, the communication speed data, and the maximum transmission power specification value data at the time of a call or at each standby time, and the selected data. 18. The mobile communication system according to claim 16, further comprising means for assigning a priority based on the priority, and means for notifying the mobile communication multi-function terminal whether or not the system can be switched according to the priority. System base station.