JPH02277327A - Car phone mobile station equipment - Google Patents

Abstract

PURPOSE:To utilize maximizingly the merit of plural automobile telephone systems by switching the system automatically depending whether a call is an outgoing call or an incoming call. CONSTITUTION:A transmitter-receiver 2C outputs a call signal in the case of making a call. The call signal is inputted to a connection system decision means 21, from which a control signal is outputted to a control terminal 112 of changeover means 13, 14. Then a 2nd system control means 12 connects to the transmitter-receiver 2C and a transmission reception means 15. An electric field strength discrimination means 16 discriminates whether or not the electric field strength of the radio wave of the connected system (1st or 2nd system) is sufficient for the relevant communication. When not sufficient, 'out of zone', information is outputted to the connection system decision means 21. Thus, the connection system decision means 21 outputs a control signal outputs a control signal to the control terminal 111 of the changeover means 13 and 14 to throw the contacts.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mobile phone mobile station device, and particularly to a mobile phone mobile station device that can be connected to a plurality of mobile phone communication systems.

(Prior Art) A mobile phone mobile station device used in a car phone communication system is composed of a telephone, a radio, and an antenna.

Incidentally, currently, car phone communication systems are sometimes operated by two or more car phone carriers in the same area. In this case, the car phone communication systems operated by each car phone carrier have different service contents, charges, and service areas.

In order to realize such roaming services using a plurality of car phone communication systems, car phone mobile station devices that can be connected to these different car phone communication systems have been proposed. This car phone mobile station device is configured to be connected to a predetermined car phone communication system that has been initialized during normal call making and receiving, and connection to other car phone communication systems is made by switching a manual switch. This is done by manipulating the .

In addition, in such a car phone mobile station device, a telephone number is set for each connectable car phone communication system, and when calling the car phone mobile station device, the car phone mobile station device Make a call using the phone number set for the car phone communication system connected to the car.

(Problems to be Solved by the Invention) The above-described conventional technology had the following problems.

(1) When two or more car telephone communication systems are operated in the same area, each system generally has different service content, fees, and service areas as described above, but each In order to maximize the benefits of the system, it is necessary to switch between systems depending on whether the communication is outgoing or incoming.

FIG. 5 is a chart showing an example of the difference in service area and system usage fee of two car telephone communication systems operated in the same area.

In this example, for example, the service area of a car phone communication system (first car phone communication system, hereinafter simply referred to as the first system) operated by a certain car phone carrier is operated by another car phone carrier. Car telephone communication system (second car telephone communication system,
(hereinafter simply referred to as the second system), and the system usage fee is cheaper when making calls from a car equipped with the car phone mobile station device, and when receiving calls from a car. The amount is the same for both the first and second systems.

In areas where such systems are operated, the second system with lower charges is used for outgoing calls, and the charges for incoming calls are the same for both the first and second systems, so the service area is wide. It is better to use the first system,
The merits of each system can be maximized, which is advantageous for users of the mobile phone mobile station device.

However, it is extremely troublesome to perform this switching using a manual changeover switch provided in the mobile station device.

(2) In a car phone mobile station device that can be connected to different car phone communication systems, as mentioned above, a telephone number is set for each car phone communication system, so the car phone mobile station device can be called. In this case, the call must be made using the telephone number of the mobile telephone communication system to which the mobile station device is connected.

However, since the calling side cannot know which car phone communication system the car mobile phone mobile station device is connected to, if the call cannot be made with the phone number of one system, the phone number of the other system will be used. You have to call the number again, which is a hassle.

The present invention has been made in order to solve the above-mentioned problems, and its purpose is to provide a mobile phone mobile station device that can maximize and easily obtain the respective merits of a plurality of car phone communication systems. Our goal is to provide the following.

(Means and operations for solving the problems) In order to solve the above-mentioned problems, the present invention includes a plurality of system control means for communicating using a predetermined car telephone communication system, and each system control means. In a mobile phone mobile station device equipped with a switching means for switching the connection with the handset of the telephone, when making a call, the handset of the telephone is connected to the system control means that communicates using the car telephone communication system designated for the call. However, when a call is on standby and when a call is received, the handset is connected to a system control means that performs communication using a car telephone communication system designated for receiving calls. In this way, the system control means is automatically switched depending on whether the call is outgoing or incoming, making it possible to maximize and easily obtain the benefits of each of multiple car phone communication systems. .

The present invention also has the feature that the switching means is controlled to connect another system control means to the handset when the radio wave arrival condition of the connected car telephone communication system is poor. It has characteristics. In this way, if the radio wave condition of the car phone communication system that is automatically connected when making a call, waiting for a call, or receiving a call is not suitable for communication, the communication will be connected to another car phone communication system. There will be fewer cases where it becomes impossible.

The present invention is also characterized in that the mobile telephone mobile station device is configured so that the connection of the system control means can be switched manually. This makes it possible to cancel the automatic connection function of the system control means.

(Example) The present invention will be described in detail below with reference to the drawings.

Note that this embodiment uses two car phone communication systems (
It is applied to a mobile phone mobile station device that is configured to be connectable to the first system and the second system), and when the communication by the mobile phone mobile station device is an incoming call, it is connected to the first system, and when it is an outgoing call, it is connected to the first system. By using two systems, the benefits of each system can be maximized.

FIG. 2 is a block diagram of one embodiment of the present invention.

In the figure, a telephone 2 comprising a handset 2B and a stand 2A is connected to a radio 1. An antenna 3 is connected to the radio device 1.

3 and 4 are flowcharts showing the operation of an embodiment of the present invention, FIG. 3 is a flowchart showing the operation when waiting for an incoming call, and FIG. 4 is a flowchart showing the operation when making a call.

It is assumed that the mobile telephone mobile station device according to this embodiment starts the operation shown in FIG. 3 when its power switch is turned on. The operation shown in FIG. 4 is executed when a call request operation (such as picking up the handset 2B (FIG. 2) while waiting for an incoming call, or dialing while waiting for an incoming call, etc.) is performed during the processing operation shown in FIG. 3. This is the interrupt processing performed.

First, FIG. 3 will be explained.

In step S1, the mobile phone mobile station device is connected to a car phone communication system (first system in this example) for waiting for incoming calls.

In step S2, it is determined whether the field strength of the radio waves transmitted from the base station of the first system is sufficient for communication. If the electric field strength is sufficient, the process moves to step S6.

If the electric field strength is not sufficient, the connection is switched to another system, ie, the second system, in step S3.

In step S4, it is determined whether the field strength of the radio waves transmitted from the base station of the second system is sufficient for communication. If the electric field strength is sufficient, the process moves to step S6.

If the electric field strength is not sufficient, in step S5, the connection is switched again to the car telephone communication system for waiting for incoming calls, that is, the first system.

After that, the process moves to step S6.

In step S6, the connected car telephone communication system enters a standby state for incoming calls.

In step S7, it is determined whether a scheduled time (for example, 5 minutes) has elapsed. If the scheduled time has not elapsed, the process returns to step S6; if the scheduled time has elapsed, the process moves to step S1.

In this way, in the incoming call standby state, the mobile phone mobile station device is basically connected to the first system, and is switched to the second system only when the radio wave condition is not good. If the radio wave condition of the second system is also not good, the connection is returned to the first system.

Also, if a call actually arrives from the standby state,
Communication occurs between the connected systems.

Next, FIG. 4 will be explained.

First, in step S11, the mobile phone mobile station device is connected to a car phone communication system for outgoing calls (second system in this example).

In step S12, it is determined whether the field strength of the radio waves transmitted from the base station of the second system is sufficient for communication. If the electric field strength is sufficient, the process moves to step 316.

If the electric field strength is not sufficient, in step 513,
The connection is switched to another system, namely the first system.

In step S14, it is determined whether the field strength of the radio waves transmitted from the base station of the first system is sufficient. If the electric field strength is sufficient, the process proceeds to step 8.
16.

If the electric field strength is not sufficient, in step 315,
The display device (not shown) of the handset 2B (FIG. 2) shows that the car equipped with the mobile phone mobile station device is the first one.
Then, a display indicating that the second system has escaped from the communication range of the second system (an "out of range" display) is displayed. After that, the process ends.

In step S16, a calling operation, ie, dialing, transmission and reception of a calling protocol, etc., is performed, and then in step S17, a telephone call is made.

In step 818, it is determined whether the call has ended. If not completed, the process proceeds to step S.
17, and if the process has been completed, then the process ends.

Note that after the process shown in FIG. 4, the process returns to the process shown in FIG. 3 (step SL).

FIG. 1 is a functional block diagram of an embodiment of the present invention. In FIG. 1, the same reference numerals as in FIG. 2 refer to the same or equivalent parts.

In FIG. 1, the handset 2C of the telephone 2 and the transmitting/receiving means 15 of the radio 1 are switching means (system switching means).
It is connected to the first system control means 11 and the second system control means 12 via 13 and 14. This first
The system control means 11 and the second system control means 12 are control means for controlling communication by the first system and the second system, respectively. Further, the handset 2C is equipped with a microphone, a speaker, a dial key, various control buttons, an indicator lamp, a display device, etc., and achieves the function of transmitting and receiving calls.

When a control signal is input to the control terminal 111 of the switching means 13 and 14, the first system control means 1
1 is connected to the handset 2C and the transmitting/receiving means 15, and when a control signal is input to the control terminal 112, the second system control means 12 is connected to the handset 2C and the transmitting/receiving means 15.
is configured to connect to.

Note that when the connection of the car telephone communication system is switched by switching the contacts of the switching means 13 and 14, depending on the frequency of the system, the tuning circuit and oscillation circuit (either (not shown) frequency switching is performed.

When making a call, the handset 2C outputs a raw call signal. This outgoing raw signal is output, for example, when the handset 2B (Fig. J2) is picked up while waiting for an incoming call, or when a calling operation is performed while waiting for an incoming call, and is output until the outgoing call ends. This means for outputting the raw signal can be easily created by those skilled in the art.

This transmitted raw signal is input to the connection system determining means 21, and the determining means 21 then selects the switching means 13.
A control signal is outputted to the control terminals 112 of and 14, thereby connecting the second system control means 12 to the handset 2C and the transmitting/receiving means 15.

The field strength determining means 16 determines whether the field strength of the radio waves of the connected system (first or second system) is sufficient for the communication.

If it is not sufficient, that is, if the mobile phone mobile station device is outside the service area of the connected car phone communication system, “out of service” information is output to the connected system determining means 21.

As a result, the connected system determining means 21 outputs a control signal to the control terminals 111 of the switching means 13 and 14 to switch the contacts of the switching means 13 and 14.

After that, the field strength of the radio waves of the connected system is detected again. If this electric field strength is not sufficient for communication, “
"Out of range" information is output to the connected system determining means 21. Thereby, the connected system determining means 21 outputs a control signal to the control terminals 112 of the switching means 13 and 14, and switches the contacts of the means 13 and 14 again. At the same time, an "out of service" display is displayed on the handset 2C, disabling communication by the mobile phone mobile station device.

If the transmitter/receiver 2C does not output a calling signal,
That is, when a call is on standby or is being received, the output signal of the inverter 18 is input to the set terminal S of the timer 17, and the timer 17 starts measuring the scheduled time.

When the scheduled time has elapsed, the timer 17 generates an output, and this output signal Q is input to the connected system determining means 21, and the determining means 21 inputs a control signal to the control terminals 111 of the switching means 13 and 14. Ru. This connects the first system control means 11 to the handset 2C and the transmitting/receiving means 15.

Further, the output signal Q is inputted to the reset terminal R of the timer 17 via the OR gate 19, and the timer 17 measures the scheduled time again.

This also causes the output of the signal Q to stop. Note that even when a calling signal is output from the handset 2C, the calling signal is input to the reset terminal R of the timer 17 via the OR gate 19.

Further, the field strength determining means 16 determines whether the field strength of the radio waves of the connected system is sufficient for the communication.

If it is not sufficient, "out of range" information is output to the connected system determining means 21. Thereby, the connected system determining means 21 outputs a control signal to the control terminals 112 of the switching means 13 and 14, and switches the contacts of the means 13 and 14. After that, the field strength of the radio waves of the connected system is detected again.

If this electric field strength is not sufficient for communication, "out of range" information is outputted to the connected system determining means 21 again. As a result, the connection system determining means 21 outputs a control signal to the control terminals 111 of the switching means 13 and 14, and
and 14 contacts are returned to their original positions.

The connected system determining means 21 outputs a control signal to the control terminal 111 when the power switch of the mobile phone mobile station device is turned on and when the output of the outgoing signal is canceled.

The handset 2C also includes an automatic/manual changeover switch that determines whether to switch the system control means automatically or manually, and a manual system changeover switch that selects the system control means when switching is performed manually. (both not shown).

Then, when the automatic/manual changeover switch is set to the automatic changeover side, the system control means described above is automatically changed over, and when the automatic/manual changeover switch is set to the manual changeover side, the system control means described above is automatically changed over. The system control means is switched only according to the switching state of the manual system changeover switch without automatic switching.

That is, when the automatic/manual changeover switch is set to the manual changeover side (when the manual changeover command shown in FIG. 2 is output), the calling signal output from the handset 2C, Output signal Q output from timer 17,
The operation of the connected system determining means 21 based on the "out of range" information outputted from the electric field strength determining means 16 is stopped, and instead, according to the switching state of the manual system changeover switch (manual control signal in FIG. 2), The control terminal 11
A control signal is output to 1 and 112.

Furthermore, when the automatic/manual changeover switch is set to the automatic side (when the manual changeover command shown in FIG. 2 is not output), regardless of the switching state of the manual system changeover switch, The automatic switching described above is performed.

Note that the first and second system control means 11 and 12
, switching means 13 and 14, etc., are controlled by a microcomputer provided in the radio 1, and by a timer 17,
The functions of the connection system determining means 21 and the like can be realized by a microcomputer provided in the telephone 2.

Now, in FIG. 1, the connection system determining means 21,
Although means for outputting the system switching signal 22, such as a timer 17, are arranged in the telephone 2, the present invention
It is not particularly limited to this, and may be provided within the radio device 1.

Further, in the above embodiment, there are two connected car telephone communication systems (i.e., the first and second systems).
However, the present invention is not particularly limited to this, and if a car telephone communication system is designated for outgoing calls, for incoming calls, and for incoming calls, three or more The present invention may be applied to a mobile phone mobile station device configured to be connectable to a car phone communication system. In this case, prioritize the connected car phone communication systems for outgoing calls, standby for incoming calls, and for receiving calls, and if the electric field strength of the connected systems is not sufficient, lower priority It is sufficient to sequentially connect to systems having rankings.

(Effects of the Invention) As is clear from the above description, according to the present invention, the following effects are achieved.

(1) In the mobile phone mobile station device according to claim 1, when making a call, the mobile phone communication system designated for the call is sent, and when waiting for an incoming call and when the call is received, the mobile phone communication system is sent to the car phone communication system designated for the call receiving. Since the connections are made automatically, the benefits of each car phone communication system can be easily and maximally utilized.

In addition, when waiting for a call or when receiving a call, it is connected to the car phone communication system designated for receiving calls, so a person who makes a call to the car phone mobile station device can only use the phone number set for the system. Just remember.

(2) In the mobile phone mobile station device according to claim 2, if the radio wave condition of the automatically connected car phone communication system is not sufficient for communication, it is connected to another car phone communication system. There will be fewer cases where it becomes impossible.

(3) In the mobile phone mobile station device according to claim 3, the connection of the car phone communication system is further manually switched, so that the automatic connection function of the system control means can be canceled. As a result, the mobile telephone communication system to be connected can be arbitrarily specified, and the mobile telephone mobile station device can be used in a conventional manner.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram of an embodiment of the present invention. FIG. 2 is a block diagram of one embodiment of the present invention. 3 and 4 are flowcharts showing the operation of one embodiment of the present invention. FIG. 5 is a chart showing an example of the difference in service area and system usage fee of two car telephone communication systems operated in the same area. 1... Radio device, 2... Telephone, 2A... Mount, 2
B...Handset, 2C...Handset, 11...
- First system control means, 12... Second system control means, 13.14... Switching means, 15... Transmitting and receiving means, 16... Electric field strength determining means, 17... Timer,
18... Inverter, 21... Connection system determining means Patent attorney Michito Hiraki and 1 other person

Claims (3)

[Claims] (1) In a mobile phone mobile station device consisting of a telephone, a radio, and an antenna, it is equipped with a plurality of system control means for communicating using a predetermined car phone communication system, and has a switch that switches the connection between each system control means and the telephone. The switching means connects a system control means for communicating with the car telephone communication system designated for outgoing calls to the handset of the telephone when making a call, and connects the system control means for communicating with the car phone communication system designated for receiving calls when waiting for an incoming call and when receiving a call. A mobile telephone mobile station device, characterized in that a system control means for communicating with a mobile telephone communication system is connected to the handset. (2) Further comprising a radio wave condition determining means for determining the radio wave arrival state of the connected automobile telephone communication system, and the switching means is configured to: when the radio wave condition of the connected automobile telephone communication system is not sufficient for communication, 2. The mobile telephone mobile station device according to claim 1, further comprising another system control means connected to said handset. (3) The mobile telephone mobile station device according to claim 1 or 2, wherein the switching means is further configured to enable manual connection switching of the system control means.