JPH11220776A - Mobile telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically restart a speech, even when reconnection by the same system is difficult. SOLUTION: This is a mobile telephone device capable of using more than on mobile telephone systems. When there is an incoming call to a first radio telephone part 3 corresponding to a first mobile telephone system, a transmitter telephone number detection part 7 detects a calling party's telephone number, and a calling party telephone number storage part 8 stores the telephone number. When a first connection state detection part detects the decrease in a reception electric field strength, speech on the first mobile telephone system is stopped, transmission is automatically performed from a second radio telephone part to a second mobile telephone system by the use of the stored calling party's telephone number.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mobile telephone,
In particular, the present invention relates to a mobile telephone compatible with two different wireless telephone systems.

[0002]

2. Description of the Related Art In a mobile telephone system, a plurality of base stations are arranged for each zone at a predetermined interval, and the mobile telephone can select a zone having the highest electric field strength one after another to enable a call while moving. I have. However, even in the same zone, the electric field strength is reduced due to the geographical conditions of tunnels, high-rise buildings, etc., and the presence of other radio sources, or the SNR is insufficient due to noise.
May not be available and the call may not be maintained.

[0003] In such a case, it is necessary to end the call once and make a reconnection after the electric field strength becomes sufficient. Recent digital mobile phones (PDCs) in Japan enter their phone numbers and make calls to other parties.
After that, if the call is disconnected due to a weak receiving electric field, it has a function to automatically redial the call. For example, Japanese Patent Application Laid-Open No. 5-37 as a first conventional example
As described in Japanese Patent Publication No. 456, when a call is forcibly disconnected due to a decrease in electric field strength during a call, the other party's telephone number of the previous call connection is stored, and the other party's telephone number is automatically stored. 2. Description of the Related Art There is known a call connection method of a mobile telephone system that performs redialing.

Further, Japanese Patent Laid-Open Publication No. 1-1
According to Japanese Patent No. 74029, it is possible to receive radio waves from a base station, but there is an incoming call to a mobile phone user who is in an area where transmission to the base station is not possible and the telephone number of the caller. Is informed of the mobile phone.

A third conventional example is disclosed in Japanese Patent Laid-Open No. 9-9 / 1997.
According to Japanese Patent No. 8485, when the switching button is operated because the receiver is out of the communication range, the transmission number temporarily stored in the transmission number temporary storage unit is updated as predetermined.
After that, once the line is disconnected, the updated calling number is read out and transmitted automatically.

[0006]

However, in the first prior art, the system for redialing is a system in which the same received electric field is weakened. Except for the above, there were many cases where the received electric field strength was still weak, and there were cases where reconnection was difficult.

In the second conventional example, even if the telephone number is notified when the call is disconnected, the line must be reconnected.

Further, in the third conventional technique, there is no point in operating the changeover switch if the area where the receiver is located does not change.

The present invention has been made to solve the above problems. Accordingly, an object of the present invention is to provide a mobile telephone that can resume a call even when it is difficult to reconnect in the same system.

[0010]

In order to achieve the above object, a mobile telephone according to the present invention comprises: an antenna; a first wireless telephone unit connected to the antenna and corresponding to a first wireless telephone system; A second wireless telephone unit connected to an antenna and corresponding to a second wireless telephone system different from the first wireless telephone system; and one of the first wireless telephone unit and the second wireless telephone unit A state detection unit that detects a call state with the other party using the communication unit, and, according to a detection result of the state detection unit, a communication between the one of the first wireless telephone unit and the second wireless telephone unit and the other party. And a control unit for disconnecting the call and using the other of the first wireless telephone unit and the second wireless telephone unit to establish the call of the other party.

[0011] The mobile telephone of the present invention has a call permission for indicating whether or not a call with the other party is possible using the other of the first wireless telephone unit and the second wireless telephone unit. A communication permission unit that outputs a signal, wherein the control unit is configured to control the first wireless communication when the communication permission signal indicates that a call with the other party is possible using the other party. Disconnect the call between the one of the telephone unit and the second wireless telephone unit and the other party and establish the call of the other party using the other of the first wireless telephone unit and the second wireless telephone unit. I do.

[0012] The mobile telephone of the present invention further comprises a caller number storage means for storing the telephone number of the other party, and the control unit comprises a telephone number stored in the caller number storage means. A telephone call with the other party is established using the telephone number of the other party.

[0013] The call using the one of the first wireless telephone unit and the second wireless telephone unit may be made by calling from the other party. The one of the first wireless telephone unit and the second wireless telephone unit may be predetermined.

The control unit includes a system selection unit for selecting the other of the first wireless telephone unit and the second wireless telephone unit according to system designation data, and a call state detected by the state detection unit. And an automatic transmission control unit for automatically outputting the system designation data to the system selection unit according to the above.

In this case, the system selection unit selects one of the first wireless telephone unit and the second wireless telephone unit according to system designation data input by a user.

[0016] When the detection output from the one of the first radiotelephone unit and the second radiotelephone unit becomes lower than a predetermined level, the state detection unit uses the one of the first radiotelephone unit and the second radiotelephone unit. Disconnect the call with the other party and establish a call with the other party using the other party.

The one wireless telephone section of the first wireless telephone section or the second wireless telephone section is a PHS wireless telephone section, and the other wireless telephone section is a wireless telephone compatible with a portable telephone system. Department.

As described above, the mobile telephone of the present invention can automatically perform a call using a completely different system when the received electric field strength decreases during a call, so that reconnection with the same system can be performed. Even if it is difficult, you can resume the call that was interrupted.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mobile telephone according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the configuration of the mobile telephone according to the first embodiment of the present invention. The mobile telephone includes an antenna 1, a coupling unit 2, a first wireless telephone unit 3, a second wireless telephone unit 4, a system selection unit 5, a telephone operation unit 6, a caller telephone number detection unit 7, and a caller telephone number storage unit 8. , An automatic transmission control unit 9 and a first connection state detection unit 10.

As mentioned above, the mobile telephone of the present invention
First to connect to two wireless telephone systems
A first wireless telephone unit 3 for connecting to a second mobile telephone system, and a second wireless telephone unit 4 for connecting to a second mobile telephone system. Here, as an example, the first
It is assumed that a PHS system is adopted as a mobile telephone system and a digital cellular phone (PDC) system is adopted as a second mobile telephone system.

Each of the radio telephone sections 3 and 4 is connected to the antenna 1 through the coupling section 2, and the first radio telephone section 3 and the second radio telephone section 4 can be simultaneously connected to the respective systems. is there. In addition, a telephone operation unit 6 for performing operations necessary for making and receiving calls is provided.

When making a call, system designation data for designating a system to be used for the call is input from the telephone operation unit 6. In addition, a destination telephone number is input from the telephone operation unit 6. Next, the telephone operation unit 6 outputs a call request signal to the system selection unit 5 together with the system designation data and the destination telephone number.

Next, the operation of the system selection unit 5 will be described with reference to the operation flowchart of the system selection unit 5 in FIG.

When the system selection unit 5 receives the transmission request signal (step 301), it uses one of the first radio telephone unit 3 and the second radio telephone unit 4 based on the system designation data in response to the transmission request signal. The radio telephone unit is selected and a destination telephone number and a transmission control signal are output to the radio telephone unit to be used.

More specifically, it is determined in step 302 whether or not the first wireless telephone unit 3 has been selected. If the answer is YES, the first wireless telephone unit 3 is selected as the used wireless telephone unit in step 303. Subsequently, a transmission control signal and a destination telephone number are output from the system selection unit 5 to the wireless telephone unit 3 to be used. The wireless telephone unit 3 makes a call via the coupling unit 2 and the antenna 1 based on the destination telephone number in response to the transmission control signal.
Thereby, communication using the first wireless telephone unit 3 becomes possible.

On the other hand, if NO in step 302, the control proceeds to step 304, where it is determined whether or not a call request to the second wireless telephone unit 4 has been made. If NO in step 304, the control returns to step 302. YE at step 304
In the case of S, that is, in the case of a call request to the second wireless telephone unit 4, in step 306, the second wireless telephone unit 4 is selected as the used wireless telephone unit. Subsequently, in step 307, the system control unit 5 outputs a transmission control signal and a destination telephone number to the wireless telephone unit 4. The wireless telephone unit 4 makes a call via the coupling unit 2 and the antenna 1 based on the destination telephone number in response to the transmission control signal. Thereby, the second wireless telephone unit 4
Can be used.

Next, the operation when the first wireless telephone unit 3 receives an incoming call will be described.

First, the first wireless telephone unit 3 receives an incoming signal through the antenna 1 and the coupling unit 2 and outputs an incoming notification signal for notifying the telephone operating unit 6 that there is an incoming call. Upon receiving the incoming call notification signal, the telephone operating section 6 sounds a ringing tone to notify the user of the incoming call, accepts the incoming call by the user's operation, and starts talking with the other party.

On the other hand, the incoming call signal to be received includes a caller ID notification signal for notifying the telephone number of the call destination, and the first wireless telephone unit 3 transmits the caller ID notification signal to the caller telephone number detector. 7 is output. The caller telephone number detector 7 detects the caller telephone number from the caller number notification signal, and stores it in the caller telephone number storage 8.

The first wireless telephone section 3 outputs to the first connection state detecting section 10 a connection state signal for notifying the connection state with the other party. Here, the connection state means whether or not the connection with the other party is continued. The first connection state detection unit 10 detects the connection state signal from the connection state signal for some reason after the connection with the other party is established once (generally, the reception electric field strength from the base station received by the first wireless telephone unit 3 becomes weaker). Detects that the connection has been disconnected, and outputs a connection switching signal to the automatic transmission control unit 9.

The automatic transmission controller 9 generates a read request signal in response to the connection switching signal. The caller telephone number storage unit 8 outputs the caller telephone number to the automatic call control unit 9 in response to the read request signal from the automatic call control unit 9. The automatic call control unit 9 stores the read caller telephone number in the second
The data is sent to the system selection unit 5 together with the system designation data for designating the wireless telephone unit 4.

The outgoing call request signal from the system selecting section 5 contains the telephone number of the outgoing call destination, and can be stored in the outgoing caller's telephone number storing section 8 like the incoming call signal to be received.

Next, the operation of the automatic transmission control section 9 will be described with reference to the operation flowchart of the automatic transmission control section 9 shown in FIG.

In step 401, the first connection state detecting section 10 outputs a disconnection detection signal based on the connection state signal from the first wireless telephone section 3. Automatic transmission control unit 9
Keeps monitoring the connection switching signal from the first connection state detection unit 10.

When the automatic transmission control unit 9 receives the connection switching signal from the first connection state detection unit 10 and detects the disconnection (step 401), it first issues a read request signal to the caller number storage unit 8 and is connected. Inquiry about the telephone number of the called party (step 402), and the caller number storage unit 8
The telephone number of the other party connected from is read (step 403).

A reselection call request signal for making a call from the second mobile telephone system to the other party's telephone number, the other party's telephone number data, and system designation data for designating the second wireless telephone section 4 are transmitted to the system selection section 5. (Step 404).

The system selector 5 selects the second wireless telephone unit 4 based on the system designation data in the same manner as when processing the call request signal sent from the telephone operating unit 6, and the automatic call controller. A transmission control signal is output to the second wireless telephone unit 4 based on the other party telephone number data supplied from 9 so as to make a call to the destination telephone number. The second wireless telephone unit 4 receiving the transmission control signal performs a transmission operation based on the other party's telephone number data.

Next, a mobile telephone according to a second embodiment of the present invention will be described with reference to FIG.

The mobile telephone according to the second embodiment has the first
In the first radio telephone unit 3 in the embodiment, when the reception electric field intensity of the reception signal from the base station becomes weak while being connected to the other party, the reception electric field intensity of the second radio telephone unit 4 becomes sufficiently high. If it is strong, the call in the first wireless telephone unit 3 is disconnected, and the second wireless telephone unit 4 automatically makes a call to the same connection destination.

The mobile telephone according to the second embodiment has
Antenna 1, coupling unit 2, first wireless telephone unit 3, second wireless telephone unit 4, system selection unit 5, telephone operation unit 6, caller telephone number detection unit 7, caller telephone number storage unit 8, automatic call control It comprises a unit 9 ′, a first reception electric field detection unit 11, and a second reception electric field detection unit 12.

As described above, the mobile telephone according to the second embodiment is connected to two radio telephone systems, and each of the first and second mobile telephones is connected to the first mobile telephone system.
A wireless telephone unit 3 and a second wireless telephone unit 4 for connecting to a second mobile telephone system are provided. Further, the radio telephone sections 3 and 4 are connected to the antenna 1 through the coupling section 2, respectively, so that the first radio telephone section 3 and the second radio telephone section 4 can be simultaneously connected to the respective systems. First, there is provided a telephone operation unit 6 for performing operations necessary for making and receiving a call, and when making a call, desired system designation data and a destination telephone number are input from the telephone operation unit 6. Next, the telephone operation unit 6 outputs a transmission request signal to the system selection unit 5 based on the input information.

Next, the operation of the system selection unit 5 will be described with reference to the operation flowchart of the system selection unit 5 in FIG.

Upon receiving the call request signal (step 301), the system selection unit 5 responds to the call request signal based on the system designation data and the first wireless telephone unit 3 or the second wireless telephone unit 3.
The radio telephone unit 4 is selected as the radio telephone unit to be used (step 303 or step 306), and a transmission control signal is output to the selected radio telephone unit so as to transmit the call to the destination telephone number (step 305 or step 307).

Next, the operation when the first wireless telephone unit 3 receives an incoming call will be described.

For example, assume that user X receives a call from user Y, as shown in FIG.

First, the first wireless telephone unit 3 receives an incoming signal via the antenna 1 and the coupling unit 2 and outputs an incoming notification signal for notifying the telephone operating unit 6 that there is an incoming call.
Upon receiving the incoming call notification signal, the telephone operating section 6 sounds a ringing tone to notify the user of the incoming call, accepts the incoming call by the user's operation, and starts talking with the other party.

On the other hand, the incoming call signal includes a caller ID notification signal for notifying the telephone number of the call destination, and the first wireless telephone section 3 transmits the caller ID notification signal to the caller telephone number detector. 7 is output. The caller telephone number detector 7 detects the caller telephone number from the caller number notification signal and outputs it to the caller telephone number storage 8. The caller telephone number storage section 8 outputs the caller telephone number to the automatic call control section 9 in response to the read request signal from the automatic call control section 9 '. As described above, the same operation as in the first embodiment is performed.

Further, the first wireless telephone section 3 outputs a received electric field strength signal of the base station to the first received electric field detecting section 11. First
The reception electric field detection unit 11 determines whether or not the reception electric field intensity signal is sufficiently strong or weak relative to a predetermined reference value to determine whether or not it is appropriate to continue the call connected by the first wireless telephone unit 3. . When it is determined that the continuation of the call is inappropriate, the connection continuation alarm signal is output to the automatic transmission control unit 9 '.

Further, the second radio telephone section 4 outputs a received electric field strength signal from the base station to the second received electric field detecting section 12.
The second reception electric field detection unit 12 determines whether or not the connection can be made sufficiently based on whether the reception electric field strength signal is sufficiently strong or weak with respect to a predetermined reference value when making a new call connection, If it is determined that the call can be continued, a connection notice signal is output to the automatic transmission control unit 9 '.

Next, the operation of the automatic transmission control section 9 'will be described with reference to the operation flowchart of the automatic transmission control section 9' shown in FIG.

Upon receiving the connection continuation alarm signal from the first reception electric field detection unit 11, the automatic transmission control unit 9 'determines whether the call of the first wireless telephone unit 3 can be continued (step 501). If it is determined that continuation is not possible, it is next determined whether or not the call of the second wireless telephone unit 4 can be continued based on whether or not the connectable notification signal is transmitted from the second reception electric field detection unit 12 (step 502). .

If the result of this determination is that there is a connectable signal, a call disconnection request signal is output to the first wireless telephone unit, and the call is disconnected (step 503). Then, the telephone number of the connected party connected to the caller number storage unit 8 is inquired (step 504), and the number is read (step 505).
A reconnection transmission request signal is output to the system selection unit 5 together with the system designation data so that the second wireless telephone unit 4 transmits the call to the destination telephone number (step 506).

The system selection unit 5 selects the second wireless telephone unit 4 based on the system designation data in the same manner as the transmission request signal sent from the telephone operation unit 6, and the second wireless telephone unit 4 Output a transmission control signal to transmit to a number. The second wireless telephone unit 4 receiving the transmission control signal performs a transmission operation based on the transmission control signal.

For example, as shown in FIG. 6, suppose that user X receives a call from user Y from base station A covering area 30. As shown in FIG.
In a state where a call is made by the first mobile telephone system via the base station A and the user X receives a weak electric field from the base station A (generally, a shadow of a building or a user X 'in a building). When you move to, the call may be suddenly disconnected.

However, in the mobile telephone of the present invention,
Even if the call is disconnected, the call is terminated by the first wireless telephone unit 3 and the base station B is communicated to the other party who was talking on the first mobile telephone system using the second mobile telephone system.
The call can be automatically redialed via (FIG. 6). In other words, even when the connection is temporarily disconnected, the telephone number of the other party is called from the memory and dialed, or the connection is automatically re-established without dialing while viewing the memo.

In particular, if the call starts with an incoming call from the other party, and if there is no means for knowing the telephone number of the other party, it will not be possible to make a new call here. However, in the present invention, since there is a means for detecting and storing the caller number, the telephone number of the other party can be known, and re-calling is possible.

In general, the first mobile telephone system and the second mobile telephone system are assumed to be systems having different service ranges from each other. For example, the first mobile telephone system provides a relatively wide range of outdoor services (FIG. 6).
Area 30), no service is provided in the shadow of a building or indoors, and conversely, the second mobile telephone service is provided mainly in the shadow of a building or indoors (area 3 in FIG. 6).
2) It is possible. For example, considering a mobile telephone system in Japan, it can be said that the first mobile telephone system is a digital cellular phone (PDC) and the second mobile telephone system is a PHS.

That is, if the user moves indoors while talking on the PDC and the call is disconnected, the PHS can automatically reconnect. Naturally, even if the first mobile telephone system is provided indoors and the second mobile telephone system is provided over a relatively wide area, it is necessary to assume that the user is going indoors and going out outdoors suddenly. The effects of the invention can be obtained.

Further, in the mobile telephone according to the second embodiment, the detection level that the continuation of the call is inappropriate in the first mobile telephone system can be arbitrarily set, so that the reception electric field in the second mobile telephone system can be set. If the strength is sufficient, it is possible to switch the call from the first mobile phone system to the second mobile phone system before the reception electric field of the first mobile phone system becomes weak and the quality of the call deteriorates. Becomes

In the mobile telephone corresponding to the two systems as in the present invention, the redialing is performed in different systems, so that the reconnection success probability is considerably high.

[0062] The mobile telephones corresponding to the two systems according to the present invention are expected to spread in countries around the world in the future.
In particular, in the North American market, cellular systems that use the 800 MHz band and PCS systems that use the 1.9 GHz band, when viewed by each service company, have areas where each system complements areas that cannot be covered by each other. Many are found. In such a case, the first mobile telephone system is adapted for a cellular system using the 800 MHz band, and the second mobile telephone system is operated at a frequency of 1.9.
If the system is adapted for a PCS system using the GHz band, reconnection can be automatically performed in both the service area of the cellular system and the service area of the PCS system.

Alternatively, while in a PHS system service area where the service area is small but call charges are easy, the system is selected, and for some reason, the user moves out of the PHS service area during a call and the call is disconnected. In such a case, it is conceivable that the call is re-transmitted in a PDC system in which the service charge is high but the service area is wide.

In the above description, the PDC system, the PHS
Although the first and second mobile telephone systems of the present invention are not limited to the above, the present invention is not limited to the first and second mobile telephone systems, but may be any other wireless telephone system, especially a new system to be provided with services in the future. Can also be applied.

In the above description, only one of the two radio telephone units can be switched to the other. However, it is clear that the arrangement may be such that one of the two radiotelephone units can be switched to the other.

Further, in the above description, when a call is made from the other party, the telephone number of the other party is stored in the storage unit. However, it is clear that the configuration may be such that the telephone number of the other party can be stored even when a call is made from the mobile telephone.

[0067]

As described above, according to the present invention, it is possible to provide a mobile telephone capable of resuming a call even when reconnection in the same system is difficult.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing a configuration of a mobile telephone according to a first embodiment of the present invention.

FIG. 2 is a circuit block diagram showing a configuration of a mobile phone according to a second embodiment of the present invention.

FIG. 3 is a flowchart illustrating an operation of a system selection unit 5;

FIG. 4 is an operation flowchart of the automatic transmission control section 9 of the mobile telephone according to the first embodiment of the present invention.

FIG. 5 is an operation flowchart of an automatic transmission control unit 9 'of the mobile telephone according to the second embodiment of the present invention.

FIG. 6 is a diagram for explaining the operation of the mobile telephone according to the second embodiment of the present invention.

FIG. 7 is a sequence diagram for explaining an operation of the mobile phone according to the second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antenna 2 Coupling part 3 1st radio telephone part 4 2nd radio telephone part 5 System selection part 6 Telephone operation part 7 Caller telephone number detection part 8 Caller telephone number storage part 9 Automatic transmission control part 9 'Automatic transmission control part DESCRIPTION OF SYMBOLS 10 1st connection state detection part 11 1st reception electric field detection part 12 2nd reception electric field detection part

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[Procedure amendment]

[Submission date] April 12, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

Claims (9)

[Claims] An antenna, a first wireless telephone unit connected to the antenna and corresponding to a first wireless telephone system, and a second wireless unit connected to the antenna and different from the first wireless telephone system A second wireless telephone unit corresponding to a wireless telephone system, a state detection unit that detects a communication state with a partner using one of the first wireless telephone unit and the second wireless telephone unit, A call between the one of the first wireless telephone unit and the second wireless telephone unit and the other party is disconnected according to a detection result of the state detection unit, and the first wireless telephone unit and the second wireless telephone are disconnected. And a control unit for establishing a call with the other party using the other of the units. 2. A call for outputting a call permission signal for indicating whether a call with the other party is possible using the other one of the first wireless telephone unit and the second wireless telephone unit. Further comprising a permission unit, wherein the control unit is configured to, when the call permission signal indicates that it is possible to perform a call with the other party using the other, the first wireless telephone unit and the second 2. The communication between the one of the two wireless telephone units and the other party is disconnected, and the other party's telephone is established using the other one of the first wireless telephone unit and the second wireless telephone unit. The described mobile telephone. 3. The system according to claim 2, further comprising: a caller number storage unit for storing the telephone number of the other party, wherein the control unit uses the telephone number of the other party stored in the caller number storage unit. 3. The mobile telephone according to claim 1, wherein a telephone call is established with the other party. 4. The telephone according to claim 1, wherein a call using said one of said first wireless telephone unit and said second wireless telephone unit is made by calling from said other party. Mobile phone. 5. The mobile telephone according to claim 1, wherein said one of said first radio telephone unit and said second radio telephone unit is predetermined. 6. The system control section for selecting the other of the first wireless telephone section and the second wireless telephone section in accordance with system designation data, and the control section detects the state by the state detecting section. The mobile telephone according to any one of claims 1 to 5, further comprising: an automatic transmission control unit that automatically outputs the system designation data to the system selection unit according to a call state. 7. The mobile telephone according to claim 6, wherein the system selection unit selects one of the first wireless telephone unit and the second wireless telephone unit according to system designation data input by a user. 8. The state detection unit uses one of the first wireless telephone unit and the second wireless telephone unit when the detection output from the other is lower than a predetermined level. The mobile telephone according to any one of claims 1 to 7, wherein a call with the other party is disconnected, and a call with the other party is established using the other party. 9. One of the first wireless telephone section and the second wireless telephone section is a PHS wireless telephone section, and the other wireless telephone section is a wireless telephone compatible with a portable telephone system. The mobile telephone according to any one of claims 1 to 8, wherein the mobile telephone is a unit.