JP2001224071A - Communication control method for mobile communication terminal and recording medium with its communication control method recorded thereon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication control method for a mobile communication terminal having transmission/reception functions adopting different mobile communication systems by which method communication adopting a 2nd mobile communication system can be received when receiving a communication call signal of the 2nd mobile communication system during the communication by a 1st mobile communication system and to provide a recording medium with its communication control method recorded thereon. SOLUTION: The mobile communication terminal having a PDC control section 11 that can send/receive a PDC radio wave and having a PHS control section 12 that can send/receive a PHS radio wave, terminates PDV packet communication by a specified interruption sequence that transmits a packet communication registration release request to a PDC base station 1 and conducts incoming call processing for a speech of a PHS when a PHS base station 3 transmits a paging signal during the communication with a PDC base station 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication control method for a mobile communication terminal having a transmitting / receiving function of a plurality of different mobile communication systems, and a recording medium recording the communication control method.

[0002]

2. Description of the Related Art Conventional mobile communication terminals having transmission / reception functions of a plurality of different mobile communication systems include, for example, P
DC (Personal Digital Celluar) and PHS (Personal
There is a mobile communication terminal that is combined with the Handy-phone System.

In such a communication device, there is no problem when radio waves are received by both mobile communication systems at the same time and when radio waves of the other mobile communication system are received during communication by one mobile communication system. When radio waves are transmitted by both mobile communication systems, unnecessary radio waves are generated due to intermodulation distortion.

[0004] As a countermeasure against intermodulation distortion, when each transmitting and receiving unit of both mobile communication systems is shielded individually so as not to interfere with each other, or when the antenna of the transmitting unit is shared by both mobile communication systems, Insert an irreversible element such as an isolator or circulator, or an antenna switch such as a circulator switch in the wiring path so that they do not interfere with each other through the antenna and wiring,
There is a method of suppressing unnecessary generation of radio waves due to intermodulation distortion by improving the performance of a filter element such as a duplexer.

However, when the demand for the isolation performance of components such as an isolator, a circulator, a duplexer or an antenna switch, or a shield used in a transmission portion is increased, as in the above-described countermeasure for intermodulation distortion, the use of such a shield is difficult. The size and weight of the communication device increases, and accordingly, the communication device as a whole increases in size and weight. For this reason, such a method is not applied to a communication device that requires portability, such as a mobile communication terminal, and while a radio wave of one mobile communication system is being transmitted, the other mobile communication system is not used. The method of prohibiting the transmission of the radio wave of the system is performed.

On the other hand, in recent mobile communication terminals, various types of communication such as access to a homepage via mail or the Internet other than voice communication are provided. Due to the performance of mobile communication terminals, these services do not require long-term access like, for example, surfing on a desktop computer, and are designed to allow quick and easy sending and receiving of mail or access to the Internet. I have. For this reason, communication by these services does not take much time for reconnection even once terminated, and has a lower priority than a voice call with a partner.

[0007]

However, in a conventional mobile communication terminal having a transmission / reception function of two mobile communication systems, the transmission unit of one mobile communication system is used as described above regardless of the priority of communication. During transmission of radio waves, transmission of radio waves by the transmission unit of the other mobile communication system is prohibited. For this reason, during communication using one mobile communication method,
Even if the priority of the communication during communication is low, there is a problem that it is not possible to perform the incoming call processing of the communication with high priority such as a call by the other mobile communication method.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a communication control method for a mobile communication terminal which solves the above-mentioned problems and improves usability, and a recording medium on which the communication control method is recorded.

[0009]

SUMMARY OF THE INVENTION The present invention is directed to a different first type.
And a communication control method for a mobile communication terminal that has a transmission / reception function of the second mobile communication system and does not perform transmission in both communication systems at the same time. Mobile communication characterized by being able to terminate communication of the first mobile communication system and perform termination processing of communication of the second mobile communication system when a call signal for communication of the mobile communication system is received. This is a communication control method of the terminal.

According to the present invention, when a call signal for communication in the second mobile communication system is received during communication in the first mobile communication system, the communication in the first mobile communication system is terminated. An incoming call process of communication of the second mobile communication system can be performed,
Accordingly, the usability of the mobile communication terminal is improved.

Further, according to the present invention, when terminating communication of the first mobile communication system and performing termination processing of communication of the second mobile communication system, a predetermined disconnection sequence for transmitting a signal indicating the end of communication is provided. , The communication of the first mobile communication system is terminated.

According to the present invention, when a call signal for communication in the second mobile communication system is received during communication in the first mobile communication system, a predetermined disconnection sequence for transmitting a signal to end communication is provided. , Can be terminated correctly.

Further, the present invention provides a method for transmitting radio waves of the first mobile communication system when terminating the communication of the second mobile communication system after terminating the communication of the first mobile communication system. The first mobile communication system is forcibly terminated by terminating the communication.

According to the present invention, transmission of radio waves of the first mobile communication system is stopped when a call signal of communication of the second mobile communication system is received during communication of the first mobile communication system. This makes it possible to forcibly end the communication of the first mobile communication system. Therefore, immediately after receiving the call signal of the communication of the second mobile communication system, the communication of the first mobile communication system can be terminated, and the incoming call processing of the communication of the second mobile communication system can be performed.

Further, the present invention provides a method for ending communication of the second mobile communication system when the communication of the first mobile communication system is terminated and the incoming call processing of the communication of the second mobile communication system is performed. Further, the communication of the first mobile communication system is connected again.

According to the present invention, it is possible to reconnect the communication of the first mobile communication system once completed, after the communication of the second mobile communication system is completed. Therefore, if the communication state of the first mobile communication system at the time of disconnection is stored and the incoming call processing of the communication of the second mobile communication system is performed, the communication is terminated once after the communication of the second mobile communication system is completed. The communication of the first mobile communication system can be restored to the state before disconnection.

Further, the present invention provides a method for receiving a call signal for communication in the second mobile communication system during communication in the first mobile communication system, wherein the first and second mobile communication systems are stored in advance. Terminating the communication of the first mobile communication method according to the priority order and / or the priority order of available communication types;
It is characterized in that it is determined whether or not to perform the incoming call processing of the communication of the second mobile communication system.

According to the present invention, when a call signal of the communication of the second mobile communication system is received during the communication of the first mobile communication system, the communication of the communication of the first mobile communication system during the communication is performed. Depending on the priority, whether to terminate the communication of the first mobile communication system and perform the incoming call processing of the communication of the second mobile communication system is selected. For this reason, even when the communication is performed by the first mobile communication method, if the priority of the communication is low, the communication of the second mobile communication method can be received.

Further, according to the present invention, when a call signal of the communication of the second mobile communication system is received during the communication of the first mobile communication system, an incoming call process of the communication of the second mobile communication system is performed. The determination is made in advance based on a flag indicating whether or not to perform the incoming call processing.

According to the present invention, when a call signal of the communication of the second mobile communication system is received during the communication of the first mobile communication system, the communication of the first mobile communication system is terminated, Whether to perform the incoming call process of the communication of the second mobile communication system or to continue the communication of the first mobile communication system is determined based on a flag in which whether or not to perform the incoming call process is set in advance. Therefore, whether or not to perform the incoming call processing can be easily changed only by rewriting the flag.

Further, according to the present invention, when a call signal of communication of the second mobile communication system is received during communication by the first mobile communication system, the user is notified of the reception of the call signal, The communication of the first mobile communication system is terminated, and the user is made to select whether or not to perform the incoming call processing of the communication of the second mobile communication system.

According to the present invention, the user of the mobile communication terminal terminates the communication of the first mobile communication system and selects whether or not to perform the incoming call processing of the communication of the second mobile communication system. be able to. For this reason, even during communication using the first mobile communication method, it is possible to select a communication important for the user and receive an incoming call.

Further, the present invention provides a recording medium for recording a communication control method of a mobile communication terminal which has transmission / reception functions of first and second mobile communication systems different from each other and does not simultaneously transmit by both mobile communication systems. In the above, when a call signal of communication of the second mobile communication system is received during communication of the first mobile communication system, the communication of the first mobile communication system is terminated, and the communication of the second mobile communication system is terminated. This is a recording medium that records a communication control method that enables a communication incoming call process.

According to the present invention, when a call signal of the communication of the second mobile communication system is received during the communication of the first mobile communication system, the communication of the first mobile communication system is terminated. An incoming call process of the communication of the second mobile communication system can be performed.

[0025]

FIG. 1 is a schematic diagram showing a communication system of a mobile communication terminal 5 having a transmitting / receiving function of two mobile communication systems. The mobile communication terminal 5 includes a PDC (Personal Digital Celluar) as a first mobile communication system and a PHS (Personal H) as a second mobile communication system.
Andy-phone System) is a complex type terminal that has the function of transmitting and receiving radio waves in a single housing.

The mobile communication terminal 5 has a PDC control unit for controlling transmission and reception of PDC radio waves and a PHS control unit for controlling transmission and reception of PHS radio waves. In the PDC control unit, PD
The PHS control unit transmits / receives radio waves to / from the PDC communication network 2 via the C base station 1, and the PHS control unit
It transmits and receives radio waves to and from the communication network 4.

The range of a PDC radio zone 7 capable of transmitting and receiving PDC radio waves and a PHS radio zone 8 capable of transmitting and receiving PHS radio waves are different.
The mobile communication terminal 5 can transmit and receive PDC radio waves and PHS radio waves in an area where both wireless zones 7 and 8 overlap. However, if the PDC radio wave and the PHS radio wave are transmitted at the same time, an unnecessary radio wave is generated due to the intermodulation distortion of the radio wave. Therefore, while the radio wave of one communication system is transmitted, the radio wave of the other communication system is transmitted. You are forbidden to do so. In addition to the voice call, the PDC communication network 2 provides services such as browsing an Internet homepage or transmitting and receiving an e-mail by packet communication.

Hereinafter, while the user 6 is watching the Internet information by packet communication transmitted from the PDC communication network 2 on the mobile communication terminal 5, that is, the mobile communication terminal 5 and the PDC base station 1 perform packet communication. In the meantime, a communication control method when a PHS paging signal is transmitted from the PHS base station 3 to the mobile communication terminal 5 will be described.

When the mobile communication terminal 5 receives a PHS paging signal during communication with the PDC communication network 2, the mobile communication terminal 5 refers to a processing flag for incoming calls stored in a predetermined storage area to perform incoming call processing. It is determined whether or not. Here, the processing flag for the incoming call is a flag indicating a processing method when a call signal is received from another communication method during communication in a certain communication method. Is terminated and the incoming call processing is performed. If the processing flag indicates that the incoming call processing is prohibited, the communication during communication is continued ignoring the call signal.

In another communication control method, when a PHS paging signal is received during communication with the PDC communication network 2, the PHS control unit notifies the user 6 of the fact,
The communication of the DC is terminated, and the user 6 is made to select whether or not to perform the PHS incoming call processing. As a method of notifying the user 6, any of the senses such as sight or hearing may be applied. Thereafter, the PHS control unit determines whether to execute the incoming call process by detecting a predetermined operation performed by the user 6. If the operation of the user 6 indicates that the incoming call process is to be performed, the incoming call process of the PHS is performed. If the operation of the user 6 indicates that the incoming call process is not performed, the call signal is ignored and the PDC communication is continued.

In still another communication control method, priorities are set in advance for types of communication such as telephone calls and available services, in this case, priority is given to telephone calls and packet communication, and whether to perform incoming call processing according to the priorities is determined. Judge. For example, the priority of a call is set high, and the priority of packet communication is set low.
During communication by DC, the second mobile communication system PH
When receiving the paging signal of S, the PDC in communication
If the communication is not packet communication, that is, the priority is low and has not reached the predetermined level, the PDC packet communication is terminated and the PHS incoming call processing is performed. , The PHS paging signal is ignored and the P
Continue the DC call.

As a method of setting the priority, a priority is set for each mobile communication system.
The priority of DC is set high and the priority of PHS is set low, or the priority is set for each mobile communication system and its communication type. For example, four types of communication such as PDC communication and packet communication and PHS communication and mail transmission / reception are set. Priorities may be set for the types of communication. In addition, the determination of whether to perform the incoming call processing of the second mobile communication system is performed by comparing the priority level of the communication of the first mobile communication system and the communication of the second mobile communication system during communication. You may do it. Furthermore, it may be configured such that the incoming of the above-mentioned processing flag or the incoming call processing prohibition is set according to the priority.

The communication control method described above is recorded as a program on a storage medium such as a ROM (Read Only Memory) of the mobile communication terminal 5.

Next, the PDC packet communication is terminated.
A sequence of a communication control method of the mobile communication terminal 5 when it is determined that the incoming call processing of the PHS voice call is performed will be described. FIG. 2 is a sequence diagram illustrating a communication control method of the mobile communication terminal 5 according to an embodiment of the present invention.
In (1) of FIG. 2, the PDC control unit 11 of the mobile communication terminal 5
However, when the PHS number of the mobile communication terminal 5 is dialed from another mobile communication terminal or a communication device such as a general telephone during packet communication with the PDC communication network 2 via the PDC base station 1, FIG. In (2), a paging signal is simultaneously transmitted from the PHS communication network 4 to a plurality of PHS base stations in a location area near the mobile communication terminal 5. The paging signal is transmitted to the mobile communication terminal 5 by the PHS base station 3 near the mobile communication terminal 5.

The PHS control unit 12 of the mobile communication terminal 5 that has received the paging signal is an internal request for the PDC control unit 11 to have the PHS control unit 12 obtain a radio transmission right in (3) of FIG. Make a wireless right request. This is because, as described above, one mobile communication terminal 5 is prohibited from simultaneously transmitting the PDC radio wave and the PHS radio wave.

The PDC control unit 11 having received the wireless right request,
In (4) of FIG. 2, a packet communication registration release request, which is a request for packet communication registration release from the user 6, is sent to the PDC base station 1.
To do. PDC that received the request for packet communication registration release
The base station 1 checks the validity of the user 6 by using the PDC in (5) of FIG.
The communication network 2 requests the PDC control unit 11 for packet authentication, which is a message for confirmation. On the other hand, PDC
The control unit 11 transmits to the PDC base station 1 a packet authentication response which is a response to the packet authentication request in (6) of FIG. The PDC base station 1 that has received this packet communication is a message for notifying the mobile communication terminal 5 that the packet communication registration release request of (4) in FIG. 2 has been received in (7) in FIG. A registration release response is transmitted to the PDC control unit 11.

When the PDC control unit 11 receives the packet communication deregistration response, the PDC control unit 12 executes (8) in FIG.
To the PHS, and then hand over the wireless transmission right to the PHS.

Upon receiving the wireless right, the PHS control unit 12 executes a normal PHS incoming call processing sequence shown in (9) to (19) of FIG. 2, and in (20) of FIG. The communication state is established in which voice communication is performed with the other communication device via the network 4. Next, the sequence of the PHS incoming call processing will be described.

(9): Establishment of link channel right The PHS control unit 12, which has received the radio right, uses a common bidirectional control channel (Signal Control Channel; SCCH) and is a mobile communication terminal that is a mobile station (Personal Station; PS). The PHS base station 3 requests the PHS base station 3 to establish a link channel so as to create a wireless transmission path between the PHS base station 3 and the PHS base station 3 (Cell Station; CS).

(10): Link Channel Assignment The PHS base station 3 assigns a link channel to the PHS controller 12 using a common bidirectional restricted channel. By doing so, a wireless transmission path between PS and CS is set.

(11): Incoming call response The called PHS control unit 12 notifies the PHS communication network 4 that the incoming call has been received.

(12): Call setting The communication network 4 transmits a call setting message to the PHS control unit 12 via the PHS base station 3.

(13): Call Setup Acceptance Upon receiving the call setup message, the PHS control unit 12 sends a call setup acceptance message to the PHS base station 3.

(14) Secret Key Setting The PHS control unit 12 transmits its secret key to the PHS communication network 4 by transmitting a secret key message to the PHS base station 3.

(15): Authentication request The PHS communication network 4 generates an authentication random number from the PHS base station 3 and sends an authentication request message to the PHS control unit 12 to notify the PHS control unit 12 of the random number.

(16): Authentication Response Upon receiving the authentication request message, the PHS control unit 12 encrypts the random number using its own authentication key, and uses the authentication response message to transmit the result of the authentication operation to the PHS communication network 4 side. Notify.

(17): Call The PHS control unit 12 sends a call message to the PHS communication network 4.
Notify the side.

(18): Response After transmitting the calling message, when the user 6 presses the incoming call button of the mobile communication terminal 5 to go off-hook and answer the telephone, the PHS control unit 12 sends the response message to the PHS base station 3. By transmitting, the reception of the incoming call is notified to the PHS communication network 4 side.

(19): Response confirmation After receiving the response message, the PHS communication network 4
The base station 3 sends a response confirmation message to the PHS controller 12.

(20): Talking The mobile communication terminal 5 that has received the response confirmation message in the PHS control unit 12 enters a talking state.

As described above, in the communication control method of the mobile communication terminal 5 shown in FIG.
When a paging signal is transmitted from the communication network 4, the PD
After terminating the PDC communication by a prescribed disconnection sequence for transmitting a packet communication registration release request to the C base station 1,
Perform PHS incoming call processing.

FIG. 3 is a sequence diagram showing a communication control method of the mobile communication terminal 5 according to another embodiment of the present invention. 3 (1) to FIG. 3 (3) are similar to (1) to FIG. 2 (3) in FIG. 2, and the PHS base station 3 is provided to the mobile communication terminal 5 performing packet communication on the PDC side. When the paging signal is transmitted from the PDC control unit 11,
Request a wireless right.

In (4) of FIG. 3, upon receiving the wireless right request from the PHS control unit 12, the PDC control unit 11 immediately stops the transmission output of the PDC radio wave and terminates the communication with the PDC base station 1. A wireless right transfer for transferring a wireless transmission right to the PHS control unit 12 is performed.

Thereafter, in (5) to (15) of FIG. 3, PHS incoming call processing is performed in the same manner as (9) to (19) of FIG. 2, and (16) of FIG. To enter the talking state.

As described above, in the communication control method of the mobile communication terminal 5 shown in FIG.
When a paging signal is transmitted from the communication network 4, P
By stopping the transmission output of the packet communication transmitted to the DC base station 1, the PDC communication is forcibly terminated, and then the PHS termination processing is performed.

Although FIGS. 2 and 3 have been described up to the point where the PHS communication state is entered, when the packet communication with the PDC communication network 2 is disconnected, the display state and the communication state are stored, and the PHS communication state is stored. After the communication with the communication network 4 is completed, the PHS control unit 1 is automatically or by a predetermined operation.
The wireless right may be transferred to the PDC control unit 11 from 2 to restore the PDC packet communication state before disconnection.

Next, a sequence of a communication control method of the mobile communication terminal 5 when reconnecting the PDC packet communication after the end of the call with the PHS communication network 4 will be described. FIG. 4 is a sequence diagram illustrating a communication control method of the mobile communication terminal 5 according to still another embodiment of the present invention. In (1) of FIG. 4 to (20) of FIG. 4, (1) of FIG.
2, a normal disconnection of transmitting a packet communication registration release request to the PDC base station 1 when a paging signal is transmitted from the PHS communication network 4 during communication with the PDC communication network 2 as in (20) of FIG. After terminating the PDC communication according to the sequence, the terminal performs a PHS incoming call process and enters a talking state.

Thereafter, during a PHS call, (2) in FIG.
When the user 6 hangs up the telephone in 1), the calling side of the call opens the communication path through the PHS base station 3 in (22) of FIG. 4, and the mobile communication terminal 6 also opens the communication path in (23) of FIG. The communication path is opened, and the opening of the communication path is completed. Furthermore, (24) in FIG.
Then, the PHS control unit 12 that receives the disconnection signal of the wireless channel from the PHS base station 3 and receives the disconnection signal,
In (25) of FIG. 4, a disconnection confirmation signal is transmitted to the PHS base station 3, and the PHS voice call ends. Note that (2) in FIG.
The call disconnection sequence shown in (1) to (25) of FIG. 4 is a sequence when the user 6 hangs up the telephone.

Thereafter, in (26) of FIG.
2 transfers the wireless right to the PDC control unit 11, and the PDC control unit 11 having received the wireless right transmits a packet communication registration signal to the PDC base station 1 in (27) of FIG. The PDC base station 1 that has received the packet communication registration signal transmits (2) in FIG.
In step 8), a packet authentication request for the communication network 2 to confirm the validity of the user 6 is returned to the PDC control unit 11. The PDC control unit 11 having received the packet authentication request returns a packet authentication response to the PDC base station 1 as a response to the packet authentication request in (29) of FIG.
The DC base station 1 corresponds to (30) in FIG. 4 and (27) in FIG.
That the mobile communication terminal 5 has received the packet communication registration of
The packet communication registration response, which is a message to notify
It transmits to the DC control unit 11.

FIG. 5 is a sequence diagram showing a communication control method of the mobile communication terminal 5 according to still another embodiment of the present invention. In (1) of FIG. 5 to (16) of FIG. 5, similarly to (1) of FIG. 3 to (16) of FIG.
When a paging signal is transmitted from the PHS communication network 4 during communication with the PDC communication network 4, the transmission output of the packet communication transmitted to the PDC base station 1 is stopped to forcefully terminate the PDC communication. , Perform PHS incoming call processing,
Enter the incoming call state.

The following (17) of FIG. 5 to (26) of FIG.
Is similar to PDC as in (21) to (30) in FIG.
When the packet communication with the communication network 2 is disconnected, the display state and the communication state are stored, and the PHS communication network 4
After the end of the communication with the PDC, the state of the PDC packet communication before disconnection is restored.

In the communication control method shown in FIGS. 4 and 5,
After the PHS voice call, the communication of the PDC once ended can be continued from the state immediately before disconnection. In the present invention, the mobile communication system that is communicating first is the first mobile communication system, and the mobile communication system that transmits the paging signal later is the second mobile communication system. Further, although the first mobile communication system is PDC and the second mobile communication system is PHS, the first and second mobile communication systems are not limited to this.

[0063]

As described above, according to the present invention, a mobile communication terminal having a function of transmitting and receiving radio waves of different first and second mobile communication systems can be used during communication by the first mobile communication system. When the call signal of the communication of the second mobile communication system is received, the communication of the first mobile communication system is terminated, and the incoming call processing of the communication of the second mobile communication system can be performed.

According to the present invention, when a call signal for communication of the second mobile communication system is received during communication in the first mobile communication system, a prescribed disconnection sequence for transmitting a signal to end communication is transmitted. Thus, the communication of the first mobile communication system can be terminated.

According to the present invention, transmission of radio waves of the first mobile communication system is stopped when a call signal for communication of the second mobile communication system is received during communication in the first mobile communication system. By doing so, the communication of the first mobile communication system can be forcibly terminated.

Further, according to the present invention, it is possible to reconnect the communication of the first mobile communication system once terminated.

According to the present invention, when a call signal of communication of the second mobile communication system is received during communication in the first mobile communication system, communication of the first mobile communication system in communication is performed. It is determined whether or not to terminate the communication of the first mobile communication system and perform the incoming call processing of the communication of the second mobile communication system according to the priority order.

Further, according to the present invention, when a call signal for communication of the second mobile communication system is received during communication in the first mobile communication system, the communication is performed according to a preset processing method.
It is selected whether to end the communication of the first mobile communication method and perform the incoming call processing of the communication of the second mobile communication method or to continue the communication of the first mobile communication method.

According to the present invention, the user can terminate the communication of the first mobile communication system and arbitrarily select whether or not to perform the incoming call processing of the communication of the second mobile communication system. it can.

Further, according to the present invention, when a call signal of the communication of the second mobile communication system is received during the communication of the first mobile communication system, the communication of the first mobile communication system is terminated. The communication control method of the mobile communication terminal capable of performing the incoming call processing of the communication of the second mobile communication system is recorded on the recording medium.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a communication system of a mobile communication terminal 5 having a transmission / reception function of two mobile communication systems.

FIG. 2 is a mobile communication terminal 5 according to an embodiment of the present invention.
FIG. 6 is a sequence diagram showing a communication control method of FIG.

FIG. 3 is a sequence diagram illustrating a communication control method of a mobile communication terminal 5 according to another embodiment of the present invention.

FIG. 4 is a sequence diagram illustrating a communication control method of a mobile communication terminal 5 according to still another embodiment of the present invention.

FIG. 5 is a sequence diagram illustrating a communication control method of the mobile communication terminal 5 according to still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 PDC base station 2 PDC communication network 3 PHS base station 4 PHS communication network 5 Mobile communication terminal 6 User 7 PDC wireless zone 8 PHS wireless zone 11 PDC control unit 12 PHS control unit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor: Masaaki Kakimoto 22-22, Nagaikecho, Abeno-ku, Osaka City, Osaka F-term (reference) 5K033 AA00 BA14 CB01 CB19 DA19 DB16 5K034 AA19 CC05 EE03 EE09 GG04 JJ11 5K067 AA34 BB04 CC11 EE02 EE10 FF00 HH01

Claims (8)

[Claims] 1. A communication control method for a mobile communication terminal having transmission / reception functions of different first and second mobile communication systems and not simultaneously transmitting data in both communication systems, comprising: During the communication, when a call signal of the communication of the second mobile communication system is received, the communication of the first mobile communication system is terminated, and the incoming call processing of the communication of the second mobile communication system can be performed. A communication control method for a mobile communication terminal, comprising: 2. Terminating communication of the first mobile communication system,
2. The communication according to claim 1, wherein, when performing the incoming call processing of the communication of the second mobile communication system, the communication of the first mobile communication system is ended by a prescribed disconnection sequence for transmitting a signal indicating the end of the communication. Communication control method for mobile communication terminal. 3. Terminating communication of the first mobile communication system,
When performing the incoming call processing of the communication of the second mobile communication system, the transmission of the radio wave of the first mobile communication system is stopped, and the communication of the first mobile communication system is forcibly terminated. The communication control method of a mobile communication terminal according to claim 1, wherein: 4. Terminating communication of the first mobile communication system,
When the incoming call processing of the communication of the second mobile communication method is performed,
4. The communication control method for a mobile communication terminal according to claim 1, wherein the communication of the first mobile communication system is reconnected when the communication of the second mobile communication system is completed. . 5. When a call signal of communication of the second mobile communication system is received during communication by the first mobile communication system, the priority order of the first and second mobile communication systems stored in advance and And / or determining whether to terminate the communication of the first mobile communication system and perform the incoming call processing of the communication of the second mobile communication system based on the priority order of available communication types. The communication control method for a mobile communication terminal according to claim 1. 6. When receiving a call signal for communication in the second mobile communication system during communication in the first mobile communication system, it is determined whether or not to perform incoming call processing for communication in the second mobile communication system. 6. The communication control method for a mobile communication terminal according to claim 1, wherein the communication control method is determined based on a flag that is set in advance and indicates whether to perform an incoming call process. 7. When a call signal for communication of the second mobile communication system is received during communication by the first mobile communication system, the user is notified of the reception of the call signal, and the first The mobile communication according to any one of claims 1 to 4, wherein the communication of the mobile communication system is terminated, and the user is made to select whether or not to perform an incoming call process of the communication of the second mobile communication system. Communication control method of the terminal. 8. A recording medium recording a communication control method of a mobile communication terminal having transmission / reception functions of different first and second mobile communication systems and not simultaneously transmitting data in both mobile communication systems, If a call signal for communication of the second mobile communication system is received during communication of the first mobile communication system, communication of the first mobile communication system is terminated, and communication of communication of the second mobile communication system is terminated. A recording medium on which a communication control method capable of performing processing is recorded.