JP2002165270A - Phs terminal and method for automatically switching communication system during phs call - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a PHS terminal and a method for automatically switching a communication system during PHS call, capable of switching between a public network communication mode in which a communication fee is necessary, and a transceiver communication mode in which communication fee is not necessary, depending situations during the communication. SOLUTION: A PHS terminal 210 as a calling side communicates via a public network 213 with a PHS 211 (1). The PHS terminal 210 performs transceiver calling on the PHS 211, while communicating in a public network communication mode. The PHS 211 receives the transceiver calling, and returns a response on the condition that simultaneous calling codes be made coincide with each other. Thus, it is recognized that the communication in a transceiver communication mode is enabled, and connection sequence in the transceiver communication mode for trying the transition of the public network communication mode to the transceiver communication mode between the both PHS terminals is performed. When communication in the transceiver communication mode is started, the communication in the public network communication mode is disconnected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PHS terminal having a function of switching between a public network call mode and a transceiver call mode during a call, and a method of automatically switching a call system during a PHS call.

[0002]

2. Description of the Related Art The PHS system has been developing its business by taking advantage of the fact that telephone charges are lower than that of mobile phones. However, there are reductions in mobile phone call charges and terminal prices. The number of subscribers to mobile phones with a large range is increasing, and it is not possible to expect an increase in subscribers to PHS. PHS subscribers have increasingly used only the speed advantages of data communication.

[0003] However, the PHS system has a number of modes that are not available in mobile phones, and has the advantage of being versatile. Among the many modes, the transceiver mode is a unique part, and has a disadvantage that the communicable distance is limited, but there is an advantage that a telephone charge is not required.

[0004] On the other hand, if a public network is used, it is possible to talk with a party far away from the PHS terminal. Become.

[0005]

In consideration of the distance during a call, a public network is used when the distance from the PHS terminal is far and a transceiver is used when the distance is short. Can save money and evoke new needs for PHS.

[0006] However, in the current PHS system, a standby is performed in a plurality of modes such as a dual-trip mode during standby, but once the user enters a call, the user enters the call until the end of the call. Since calls can be made only in the current mode, how to realize automatic switching between the two call modes becomes a problem.

[0007] The present invention has been made in view of the above problems, and has as its object to provide a public network communication mode in which a call charge is required depending on the situation during a call, and a call charge need not be required. An object of the present invention is to provide a PHS terminal capable of switching between a transceiver call mode and a method of automatically switching a call method during a PHS call.

[0008]

Means for Solving the Problems In order to solve the above problems, the present invention has the following constitution. The gist of the invention according to claim 1 is a first wireless transmission / reception processing system for a public network call mode for performing a call with a partner PHS terminal via a public network,
A second wireless transmission / reception processing system for a transceiver communication mode for directly communicating with the other party's PHS terminal; and a connection procedure for communicating with the other party's PHS terminal via the public network, whereby the own PHS terminal communicates with the other PHS terminal wirelessly. Means for transmitting an identification code of a connected wireless base station, and a transceiver for periodically communicating from the second wireless transmission / reception processing system to the partner PHS terminal while holding the call during the call in the public network call mode. Means for performing a calling operation for sending a call message in a call mode; and a second party PHS by the second wireless transmission / reception processing system during a call in the public network call mode.
Means for receiving a response to the call message from the terminal to execute a connection procedure in the transceiver communication mode, and means for disconnecting the connection with the radio base station after the communication in the transceiver communication mode is started. The feature is in the PHS terminal. The gist of claim 2 is as follows.
During the call in the PSTN call mode, a partner PH receiving the call message by the second wireless transmission / reception processing system
The second wireless transmission / reception processing system when the identification code of the wireless base station to which the partner PHS terminal is wirelessly connected matches the identification code of the wireless base station to which the own PHS terminal is wirelessly connected; Means for transmitting a response to the paging message using the above-mentioned method, and executing a connection procedure in the transceiver communication mode, and means for disconnecting the connection with the radio base station after the communication in the transceiver communication mode is started. The PHS terminal according to claim 1, wherein The gist of the invention according to claim 3 is that a first wireless transmission / reception processing system for a public network communication mode for performing communication with a partner PHS terminal via a public network, and a transceiver communication for performing a direct communication with the partner PHS terminal. A second wireless transmission / reception processing system for the mode,
Means for executing a calling process in a public network communication mode when a reception electric field is deteriorated during a call in a transceiver communication mode or when a switching request is received from a partner PHS terminal; Means for disconnecting a transceiver radio line using the second radio transmission / reception processing system when the PHS terminal can be connected to the partner PHS terminal via a public network. The gist of the invention described in claim 4 is that the partner PHS terminal includes means for transmitting the switching request when a reception electric field is deteriorated during a call in the transceiver call mode. Of PHS terminals. The gist of the invention according to claim 5 is that a first wireless transmission / reception processing system for a public network communication mode for performing a communication with a partner PHS terminal via a public network and a transceiver communication mode for performing a direct communication with the partner PHS terminal. Between a first PHS terminal and a second PHS terminal having a second wireless transmission / reception processing system for communication between the first PHS terminal and the second PHS terminal via a public network. 2PHS
Transmitting, to the terminal, an identification code of a wireless base station to which the own PHS terminal is wirelessly connected;
Performing a calling operation of periodically transmitting a call message in a transceiver call mode from the second wireless transmission / reception processing system to the second PHS terminal while holding the call during the call in the public network call mode; The second
During a call in the PSTN call mode,
Receiving the call message by the second wireless transmission / reception processing system, the identification code of the wireless base station to which the first PHS terminal is wirelessly connected matches the identification code of the wireless base station to which the own PHS terminal is wirelessly connected. Judging whether or not to perform, and when the second PHS terminal can confirm that the identification codes of the two radio base stations match each other, the second PHS terminal sends a response to the paging message using the second radio transmission / reception processing system. Send,
Performing a transceiver call mode connection procedure;
The first PHS terminal, during a call in the PSTN call mode, uses the second wireless transmission / reception processing system to transmit the second PHS
Receiving a response to the call message from the S terminal and performing a connection procedure in a transceiver call mode;
Disconnecting the connection with the radio base station after the first PHS terminal and the second PHS terminal each start a call in the transceiver call mode, and a method of automatically switching the call method during a PHS call. Exists. The gist of the invention according to claim 6 is that when the first PHS terminal receives a switching request from the second PHS terminal when the reception electric field is degraded during a call in the transceiver call mode, or when the first PHS terminal receives a switching request from the second PHS terminal. Performing a transmission process by using the first wireless transmission / reception processing system, and disconnecting a transceiver wireless line using the second wireless transmission / reception processing system when connection to the second PHS terminal can be established via a public network using the first wireless transmission / reception processing system. 6. The telephone call during a PHS call according to claim 5, further comprising the step of transmitting the switching request when the reception electric field is deteriorated during the telephone call in the transceiver call mode. It is in the method of automatic system switching.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a PH according to an embodiment of the present invention.
It is a block diagram which shows the structure of S terminal.

The present invention focuses on the point that the PHS terminal has a communication function using a public network (hereinafter referred to as “public network communication mode”) and a communication function using a transceiver (hereinafter referred to as “transceiver communication mode”). The mode is characterized in that the mode is switched depending on the situation during a call so that a call charge can be saved and a long-time call can be secured.

Therefore, as shown in FIG. 1, PHS terminal 100 according to the present embodiment has two units, radio unit 101 and transmission / reception control unit 102, and radio unit 103 and transmission / reception control unit 104.
It has two wireless transmission / reception processing systems so that the public network communication mode and the transceiver communication mode can be performed by wireless transmission / reception processing systems independent of each other, so that one transmission / reception operation does not affect voice deterioration etc. Has become.

The transmission / reception control units 102 and 104 are mounted on an integrated circuit (LSI) 105. The CPU 106
According to the control program stored in the memory 107, the transmission / reception control units 102 and 104 are controlled to realize the public network communication mode and the transceiver communication mode, and to control the switching between the two modes according to the conditions during the communication. It has become.

The integrated circuit (LSI) 105 includes,
Sounder 108, microphone (MIC) 109, speaker 1
10. Liquid crystal display (LCD) 111, numeric keypad (KY)
E) A control unit (not shown) such as 112 is mounted. These control units are also controlled by the CPU 106 so that the respective functions can be realized in the above-described two call modes.

FIG. 2 is an explanatory diagram of a public network communication mode and a transceiver communication mode. FIG. 2A is an explanatory diagram of an outline of a call in the public network call mode. Fig. 2 (2)
FIG. 3 is an explanatory diagram of a communication outline in a transceiver communication mode.

In FIG. 2A, in a call in the public network call mode, the own PHS terminal 210 and the partner PHS terminal 21 are connected.
In order to secure a call with the public network 21, the wireless base station (hereinafter, “CS”) 212 of the public network is used as a relay station to
3 and C on which the partner PHS terminal 211 is waiting
Via S214, a call with the partner PHS terminal 211 is enabled.

In FIG. 2B, in the call in the transceiver call mode, the call between the own PHS terminal 210 and the partner PHS terminal 211 is performed only by direct communication between the terminals.

In this embodiment, the two communication modes are automatically switched as follows.
Hereinafter, the method for automatically switching the communication method during the PHS call according to the present embodiment will be specifically described with reference to FIGS.

FIG. 3 is a sequence diagram for explaining a transition from the public network communication mode to the transceiver communication mode.
FIG. 4 is a sequence diagram illustrating a transition from the transceiver communication mode to the public network communication mode.

In FIG. 3 and FIG. 4, the two PHS terminals for making a telephone call are a terminal 1 and a terminal 2. Of the two wireless units provided respectively, the wireless unit for the public network communication mode is the wireless unit 1. The wireless unit for the transceiver communication mode is shown as the wireless unit 2. In addition, the wireless base station of the public network
These are shown as CS1 and CS2. Here, it is assumed that the general call areas of CS1 and CS2 are different, that is, the general call codes are different.

First, the operation of shifting from the public network communication mode to the transceiver communication mode is performed as follows.

(1) In the sequence shown in FIG. 3, the terminal 1 performs a calling process using the radio unit 1 in order to communicate with the terminal 2 using the public network. In this calling process,
The terminal 1 includes, in the call setup message in the outgoing sequence,
The CS-ID of the CS 1 to which the terminal 1 is wirelessly connected is transmitted together.

After the terminal 1 enters a call in the public network call mode, the terminal 1 uses the radio unit 2 to periodically perform a call operation (call message transmission) in the transceiver call mode while maintaining the current call.

The terminal 2 also transmits the paging code included in the CS-ID of the CS 1 to which the terminal 1 is wirelessly attached, while the current call is being held, and It monitors whether it matches the paging code included in the CS-ID of the connected CS2.

Here, terminal 2 is wirelessly connected to CS2, and since CS1 and CS2 have different simultaneous call codes, terminal 2 does not perform a call reception operation (receives a call message) in the transceiver call mode. But,
When detecting the coincidence of the paging codes, the terminal 2 performs the incoming call operation in the transceiver call mode while maintaining the current call state, as described later.

(2) In the sequence of FIG. 3, the terminal 1 performs the calling operation (calling) in the transceiver communication mode at regular intervals while holding the communication in the public network communication mode. When the terminal 2 moves, a connection sequence by a handover for changing a CS that is wirelessly connected is executed.

Here, the terminal 1 performs a handover,
It is assumed that the operation of moving the base station from CS1 to CS2 has been performed. In this handover sequence, the terminal 1
The call setup of the outgoing message includes the C
The S-ID is transmitted together.

The terminal 1 that has performed the handover performs a call operation (transmits a call message) in the transceiver communication mode from the radio unit 2 while maintaining the communication state in the public network communication mode.

The terminal 2 holds the CS-ID of the CS 2 to which the terminal 1 has performed the handover while maintaining the current call state.
And compares the paging code in the CS-ID with the paging code included in the CS-ID of CS2 to which the terminal is wirelessly connected.

This time, since the simultaneous call codes match, the terminal 2 uses the radio unit 2 to perform a call receiving operation (receive a call message) in the transceiver call mode. In this way, the terminal 1 and the terminal 2 that are talking in the public network communication mode repeat the above-described processing each time the handover is repeated.

(3) In the sequence of FIG. 3, when the terminal 2 receives the call message from the terminal 1,
A connection sequence in the transceiver communication mode is executed between the terminal 1 and the terminal 1. If the connection sequence in the transceiver communication mode can be processed normally, the terminal 1 and the terminal 2 switch the voice path to the path by the wireless unit 2 for the transceiver communication mode, respectively.
The wireless line to S2 is disconnected.

As a result, a free space is provided in the public network line, and other terminals can be used. In addition, the transceiver call mode allows long-term calls to be secured without worrying about call charges.

At this time, the terminal 1 and the terminal 2 can receive an incoming call from the public network during a call in the transceiver call mode. You can know.

Next, the operation of shifting from the transceiver communication mode to the public network communication mode is performed as follows. In the call in the public network communication mode before the transition to the transceiver communication mode, it is assumed that the terminal 1 originated the call.

(1) In the sequence of FIG. 4, when the terminal 1 and the terminal 2 are performing a call in the transceiver call mode using the radio unit 2, the reception electric field at the terminal 2 deteriorates and an error occurs. In this case, the terminal 2 sends a TCH switching request message.

(2) In the sequence of FIG. 4, the terminal 1 is the calling side in the public call mode as described above.
Therefore, when receiving the TCH switching request message from the terminal 2, the terminal 1 uses the wireless unit 1 to execute a transmission process to the public network.

However, in the transceiver communication mode,
When the reception electric field is deteriorated in the terminal 1, the terminal 1 performs a transmission process to the public network without sending a TCH switching request message to the terminal 2.

When the transmission processing to the public network is performed normally,
The terminal 1 and the terminal 2 switch the voice path from the wireless unit 2 for the transceiver communication mode to the path by the wireless unit 1 for the public network communication mode, and disconnect the direct wireless line by the wireless unit 2.

As described above, the terminal 2 receives a transceiver call during a call in the public network call mode, and transmits a response to the call message to the terminal 1 on condition that the simultaneous call code matches.

As a result, a connection sequence in the transceiver communication mode is performed between the two PHS terminals, assuming that communication in the transceiver communication mode is possible, and attempting to shift to the transceiver communication mode between the two PHS terminals. When a call in the transceiver call mode is started, the call in the public network call mode is disconnected.

When the receiving electric field is deteriorated during the communication in the transceiver communication mode and it is difficult to maintain the communication, the transmitting side in the public network communication mode performs the connection process again via the public network.

By repeating the above-mentioned processing, it is possible to automatically switch the call between the transceiver call mode and the public network call mode.

Therefore, when the distance is long, the public network can be used, and when the distance is short, the transceiver can be used. Therefore, a long-time call can be secured while saving the call charge, and the public network line can be secured. Can be opened so that other PHS terminals can use it easily.

[0044]

As described above, according to the present invention,
It is possible to provide a PHS terminal capable of switching between a public network call mode in which a call charge is required and a transceiver call mode in which a call charge is not necessary, and a method of automatically switching a call method during a PHS call, depending on a situation during a call. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a PHS terminal according to one embodiment of the present invention.

FIG. 2 is an explanatory diagram of a public network communication mode and a transceiver communication mode. (1) is an explanatory diagram of a communication overview in a public network communication mode. (2) is an explanatory diagram of an outline of a call in the transceiver call mode.

FIG. 3 is a sequence diagram illustrating a transition from a public network communication mode to a transceiver communication mode.

FIG. 4 is a sequence diagram illustrating a transition from a transceiver communication mode to a public network communication mode.

[Explanation of symbols]

 Reference Signs List 100 PHS terminal 101, 103 Radio unit 102, 104 Transmission / reception control unit 105 Integrated circuit (LSI) 106 CPU 107 Memory 108 Sounder 109 Microphone (MIC) 110 Speaker 111 Liquid crystal display (LCD) 112 Numeric keypad (KYE) 210 Own PHS terminal 211 Remote PHS terminal 212, 214 Wireless base station (CS) 213 Public network

Claims (6)

[Claims] 1. A first wireless transmission / reception processing system for a public network communication mode for making a call with a partner PHS terminal via a public network, and a second wireless transmission / reception processing system for a transceiver communication mode for making a call directly with the partner PHS terminal. A wireless transmission / reception processing system, and means for transmitting an identification code of a wireless base station to which the own PHS terminal is wirelessly connected to the other PHS terminal in a connection procedure for making a call with the other PHS terminal via the public network; During a call in the public network call mode, the call is held by the second wireless transmission / reception processing system periodically while the call is held.
Means for performing a calling operation for transmitting a call message in a transceiver call mode to an HS terminal; and receiving a response to the call message from a partner PHS terminal by the second wireless transmission / reception processing system during a call in the public network call mode. A PHS terminal, comprising: means for executing a connection procedure in a transceiver communication mode, and means for disconnecting a connection with a radio base station after a call in the transceiver communication mode is started. 2. During a call in the PSTN call mode,
An identification code of a wireless base station to which the other PHS terminal is wirelessly connected and an identification of a wireless base station to which the own PHS terminal is wirelessly connected, the PHS terminal receiving the call message by the second wireless transmission / reception processing system Means for transmitting a response to the call message using the second wireless transmission / reception processing system when the codes match, and executing a connection procedure in the transceiver communication mode; 2. The PHS terminal according to claim 1, further comprising means for disconnecting the connection with the radio base station. 3. A first wireless transmission / reception processing system for a public network communication mode for making a call with a partner PHS terminal via a public network, and a second wireless communication processing system for a transceiver communication mode for making a call with the partner PHS terminal directly. A wireless transmission / reception processing system; and means for performing a calling process in a public network communication mode when a reception electric field is deteriorated during a communication in a transceiver communication mode or when a switching request is received from a partner PHS terminal. A PHS terminal, comprising: means for disconnecting a transceiver wireless line using the second wireless transmission / reception processing system when connection with a partner PHS terminal can be established via a public network using one wireless transmission / reception processing system. 4. The PHS terminal according to claim 3, wherein said partner PHS terminal includes means for transmitting said switching request when a reception electric field is deteriorated during a call in a transceiver call mode. 5. A first wireless transmission / reception processing system for a public network call mode for making a call with a partner PHS terminal via a public network, and a second radio for a transceiver call mode for making a call with the partner PHS terminal directly. 1st P provided with transmission / reception processing system
Between the HS terminal and the second PHS terminal, the first PHS terminal communicates with the second PHS terminal via a public network
In the connection procedure for making a call with the terminal, the second PH
Transmitting an identification code of a wireless base station to which the own PHS terminal is wirelessly connected to the S terminal; and wherein the first PHS terminal periodically holds the call while holding the call in the public network call mode. Performing a calling operation of transmitting a call message in a transceiver call mode from the second wireless transmission / reception processing system to the second PHS terminal; and Receiving the call message by a wireless transmission / reception processing system, whether or not the identification code of the wireless base station to which the first PHS terminal is wirelessly connected matches the identification code of the wireless base station to which the own PHS terminal is wirelessly connected Determining whether or not the second PHS terminal confirms that the identification codes of the two radio base stations match each other, using the second radio transmission / reception processing system. Sending a response to the paging message, and performing a connection procedure transceiver call mode, the first 1PHS terminal, during a call by the public network communication mode, the first 2PH by the second radio transmission and reception system
Receiving a response to the call message from the S terminal, and executing a connection procedure in a transceiver communication mode; and the first PHS terminal and the second PHS terminal each starting a call in the transceiver communication mode, Disconnecting the connection with the communication system. 6. The first PHS terminal, when a reception electric field is degraded during a call in a transceiver call mode, or when a switching request is received from the second PHS terminal,
Performing a call originating process in a public network call mode; and connecting to the second PHS terminal via a public network using the first wireless transmission / reception processing system, a transceiver radio line using the second wireless transmission / reception processing system. 6. The PHS according to claim 5, further comprising: a step of transmitting the switching request when the received electric field is deteriorated during a call in the transceiver call mode. Automatic call system switching method during a call.