JP5182696B2 - Mobile communication system and mobile communication method - Google Patents

Description

  The present invention relates to a mobile communication system and a mobile communication method using a first mobile terminal and a second mobile terminal (or dual mobile terminals) that can be accommodated in a button telephone apparatus, and more particularly, handover between PHS / WLAN. The present invention relates to a mobile communication system having a function and a mobile communication method.

  In the conventional PHS or WLAN, if the out-of-service movement or handover fails during a call, the call is always terminated. For this reason, the user had to make another call after disconnecting.

  That is, whether it is PHS or WLAN, it grasps the radio wave condition with the base station during a call, and if it moves to a place beyond the allowable range of the base station, it tries to move to another base station . And if it fails to change to another base station, it cannot return to the original base station, and the line during a call is disconnected.

  As described above, in the conventional mobile communication system, when the handover fails or the mobile communication system moves out of the service area, the call ends.

  For example, JP-A-2001-36937 and JP-A-8-275233 disclose related arts related to this.

JP 2001-36937 A JP-A-8-275233

  Therefore, the present invention has been made in view of the above-mentioned problems of the prior art, and its purpose is that when one mobile terminal (wireless terminal) fails in handover, the other mobile terminal The purpose is to prevent call disconnection and improve call quality by moving the call to the terminal.

In order to achieve the above object, the present invention provides a mobile communication system using a first mobile terminal and a second mobile terminal that can be accommodated in a button telephone device,
The first mobile terminal initiates a handover during a call with a telephone housed in a button telephone device,
The access point confirms that there is no response from the first mobile terminal and notifies the button telephone device that the handover has started,
The button telephone device starts calling the second mobile terminal to be handed over based on the setting information,
After the second mobile terminal responds to the call, the key telephone apparatus performs handover by switching the call from the first mobile terminal to the second mobile terminal.

Further, in the present invention, a mobile communication system using a dual mobile terminal having both the first function of the first mobile terminal that can be accommodated in the key telephone device and the second function of the second mobile terminal,
The first function of the first mobile terminal and the second function of the second mobile terminal are registered in the button telephone device,
Initiating a handover during a call by the first function of the first mobile terminal,
The access point confirms that there is no response from the first function of the first mobile terminal and notifies the button telephone device that the handover has started,
The dual mobile terminal initiates a handover of the first function of the first mobile terminal while making a call using the second function of the second mobile terminal,
The key telephone apparatus recognizes that the first mobile terminal and the second mobile terminal are the same mobile terminal, detects that it is a handover,
The button telephone device responds to the outgoing call by the second function of the second mobile terminal after the handover waiting time elapses,
A handover is performed by connecting a call partner of the first function of the first mobile terminal to the second function of the second mobile terminal.

  ADVANTAGE OF THE INVENTION According to this invention, when one mobile terminal fails in a handover etc., call disconnection can be prevented and call quality can be improved by moving the call to another mobile terminal.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
First, the configuration of the mobile communication system according to the first embodiment of the present invention will be described with reference to FIG.

  As shown in FIG. 1, the mobile communication system according to the first embodiment includes a button telephone device 100, a telephone 200, a WLAN terminal 300, a PHS terminal 400, an access point 500, and a relay station 600.

  The button telephone device 100 includes a communication control unit 10, a call circuit 11, and an information recording device 12. An access point 500 and a relay station 600 are connected to the call circuit 11.

  Next, the operation of the mobile communication system according to the first embodiment will be described with reference to FIG. 1 to FIG.

  Here, FIG. 4 is a flowchart showing the operation of the mobile communication system according to the first embodiment. The operation will be described with reference to other drawings with reference to this flowchart.

  In the first embodiment, a PHS terminal 300 and a WLAN terminal 400 that can be accommodated in the key telephone apparatus 100 are used.

  In the initial state, as shown in FIG. 1, the telephone 200 accommodated in the key telephone apparatus 100 and the WLAN terminal 300 are busy (step 401).

  Next, it is detected that the WLAN terminal 300 is out of range (step 401). Specifically, as shown in FIG. 2, the WLAN terminal 300 starts a handover (out-of-service movement) during a call with the telephone 200, and the access point 500 confirms that there is no response from the WLAN terminal 300. The button telephone apparatus 100 is notified that the handover has started.

  Next, when a switching timer (not shown) is started and the switching timer elapses for a predetermined time, as shown in FIG. 2, the button telephone device 100 calls the handover destination PHS terminal 400 based on the setting information. Is started (steps 403 to 405).

  Next, as shown in FIG. 3, the PHS terminal 400 waits for a response (step 406), and after the PHS terminal 400 answers the call, the button telephone device 100 switches the call from the WLAN terminal 300 to the PHS 400, thereby Over is realized (steps 407 to 411).

  As described above, when the communication control unit 10 of the key telephone apparatus 100 detects that the handover of the WLAN terminal 300 has started (step 402), the communication control unit 10 displays the handover information recorded in the information recording apparatus 12 as a result. refer. Based on the handover information, the communication control unit 10 calls the PHS terminal 400 by automatic call (step 405). Thereafter, when the PHS terminal 400 that has received the call responds to the incoming call, the call is switched and the handover is executed (step 408).

  Here, details of the handover information recorded in the information recording device 12 in the key telephone device 100 are shown in FIG.

  As shown in FIG. 5, the handover information includes the number and type of the handover source terminal and the number and type of the handover destination terminal.

  In addition, there is a case where the WLAN terminal 300 is successfully handed over after returning to the service area. For this reason, as described above, a timer (not shown) for starting the handover is provided. After a predetermined time elapses, the key telephone apparatus 100 notifies the other party of the call that the other party is handing over with a sound and starts calling the PHS terminal 400 (steps 403 to 405).

  If the handover of the WLAN terminal 300 is successful, a handover switching notification is sent to the WLAN terminal 300, the switching timer is canceled, and the call with the WLAN terminal 300 is continued (steps 415 to 417).

  Further, after waiting for a response (step 406), after a handover switching notification of the WLAN terminal 300, a disconnection request is made for the PHS terminal 400, and the call with the WLAN terminal 300 is continued (steps 412 to 414).

  According to the first embodiment, it is possible to receive a call due to a handover failure that has conventionally only been ended by another mobile terminal, and the call can be continued.

  Further, even after a call by handover is started, call recovery due to successful handover is possible.

  In addition, it is possible to avoid a silent call associated with a handover, and to avoid talking about the other party thinking that the call has been terminated.

(Second Embodiment)
First, the configuration of the mobile communication system according to the second embodiment of the present invention will be described with reference to FIG.

  In the first embodiment, the mobile terminal that is the handover destination must respond. In order to improve this, in the second embodiment, a handover without a response operation is realized using a dual terminal in which the functions of WLAN and PHS are implemented.

  As shown in FIG. 6, the mobile communication system according to the second embodiment includes a button telephone device 100, a telephone 200, a WLAN / PHS terminal 700, an access point 500, and a relay station 600.

  The button telephone device 100 includes a communication control unit 10, a call circuit 11, and an information recording device 12. An access point 500 and a relay station 600 are connected to the call circuit 11.

  Next, operations of the mobile communication system according to the second embodiment will be described with reference to FIGS. Here, FIG. 9 is a flowchart showing the operation of the mobile communication system according to the second embodiment. The operation will be described with reference to other drawings with reference to this flowchart. In the second embodiment, a PHS / WLAN terminal 700 that can be accommodated in the key telephone device 100 is used. As described above, both the WLAN and the PHS are registered in the key telephone apparatus 100 in advance.

  In the initial state, as shown in FIG. 9, the telephone 200 accommodated in the key telephone apparatus 100 and the WLAN of the WLAN / PHS terminal 700 are busy (step 901).

  Next, it is detected that the WLAN is out of range (step 901).

  As shown in FIG. 7, a handover (out-of-service movement) is started during a telephone call using WLAN. The access point 500 confirms that there is no response from the WLAN and notifies the key telephone apparatus 100 that the handover has started. The WLAN / PHS terminal 700 makes a call (no dial data) using the PHS while starting a WLAN handover (steps 902 to 904).

  The key telephone device 100 acquires from the information recording device 12 that the WLAN and the PHS are the same terminal, and detects the handover.

  As shown in FIG. 8, after the handover waiting time elapses, the button telephone device 100 responds to the PHS transmission. Then, the WLAN communication partner is connected to the PHS, and the handover is realized (steps 906 to 911).

  In addition, there is a case where the handover to the WLAN is successful and the handover of the WLAN is successful. For this reason, as described above, a handover waiting timer (not shown) for starting the handover is provided. The handover waiting timer receives a PHS call after a predetermined time (steps 903 and 904).

  If the handover of the WLAN terminal 300 is successful, a handover switching notification is made to the WLAN, the switching timer is canceled, and the call with the WLAN is continued (steps 917 to 923).

  Also, after waiting for a response (step 905), after switching notification of the handover of the WLAN, the handover is executed, a PHS response is notified, a PHS disconnection request is made, and the call with the WLAN is continued (steps 912 to 916). ).

  Next, with reference to FIG. 10, the detail of the operation | movement which continues a telephone call by PHS by timeout is demonstrated.

  In the initial state, the dual terminal (WLAN / PHS terminal) and the other party are talking via the key telephone device 1 (steps 1011 and 1012).

  Next, the dual terminal detects a decrease in the communication level and notifies the WLAN access point (step 1013).

  Next, the WLAN access point notifies the key telephone apparatus of the detection of the decrease in the communication level (step 1014).

  Next, the dual terminal notifies the WLAN access point of the start of handover (step 1015).

  Next, the WLAN access point notifies the button telephone apparatus of the start of handover (step 1016).

  Next, the dual terminal notifies the start of transmission of the PHS access point (step 1017).

  Next, the PHS access point notifies the key telephone apparatus of the start of outgoing call (step 1018).

  Next, the key telephone apparatus notifies the response of the PHS access point (step 1019).

  Next, the PHS access point notifies the response to the dual terminal (step 1020).

  Next, a PHS call is started between the dual terminal and the communication partner via the key telephone device (steps 1021 and 1022).

  Next, the WLAN access point notifies the end of the handover to the key telephone apparatus (step 1023).

  Next, the key telephone apparatus notifies the disconnection of the WLAN access point (step 1024).

  Finally, the WLAN access point notifies the dual terminal of disconnection (step 1025).

  Next, with reference to FIG. 11, the details of the operation of continuing a telephone call with WLAN will be described.

  In an initial state, the dual terminal (WLAN / PHS terminal) and the other party are talking via the button telephone device (step 1111).

  Next, the dual terminal detects a decrease in communication level and notifies the WLAN access point (step 1112).

  Next, the WLAN access point notifies the key telephone apparatus of the detection of the decrease in the communication level (step 1113).

  Next, the dual terminal notifies the WLAN access point of the start of handover (step 1114).

  Next, the WLAN access point notifies the button telephone apparatus of the start of handover (step 1115).

  Next, the dual terminal notifies the PHS access point that transmission has started (step 1116).

  Next, the PHS access point notifies the key telephone apparatus of the start of outgoing call (step 1117).

  Next, the WLAN access point notifies the end of the handover to the key telephone apparatus (step 1118).

  Next, the key telephone apparatus notifies the PHS access point of the response (step 1119).

  Next, the PHS access point notifies the dual terminal of the response (step 1120).

  Next, the key telephone apparatus notifies the PHS access point of disconnection (step 1121).

  Next, the PHS access point notifies the dual terminal of disconnection (step 1122).

  Finally, the WLAN call is continued between the dual terminal and the communication partner via the button telephone device (step 1123).

  According to the second embodiment, it becomes possible for the user to continue the call by performing handover between different radios without being aware of it.

  Although the invention made by the present inventor has been specifically described based on the embodiments, it is needless to say that the present invention is not limited to the above embodiments and can be variously modified without departing from the gist thereof. Yes.

  For example, in the first embodiment, the handover from the WLAN terminal to the PHS terminal is realized. However, any relay station / access point capable of performing handover and out-of-service detection can be used. It is also possible to perform handover from a PHS terminal to a WLAN terminal, from a WLAN terminal to a WLAN terminal, and from a PHS terminal to a PHS terminal using a mechanism. This method makes it possible to continue a call on another telephone regardless of the handover by any wireless terminal.

  Similarly, in the dual terminal according to the second embodiment, handover from PHS to WLAN, WLAN to WLAN, and PHS to PHS can be performed.

It is a figure which shows the structure of the mobile communication system which concerns on the 1st Embodiment of this invention with the operation state. It is a figure which shows the structure of the mobile communication system which concerns on the 1st Embodiment of this invention with the operation state. It is a figure which shows the structure of the mobile communication system which concerns on the 1st Embodiment of this invention with the operation state. 3 is a flowchart showing an operation of the mobile communication system according to the first embodiment of the present invention. It is a figure which shows the detail of the hand-over information currently recorded on the information recording device in a button telephone apparatus. It is a figure which shows the structure of the mobile communication system which concerns on the 2nd Embodiment of this invention with the operation state. It is a figure which shows the structure of the mobile communication system which concerns on the 2nd Embodiment of this invention with the operation state. It is a figure which shows the structure of the mobile communication system which concerns on the 2nd Embodiment of this invention with the operation state. 6 is a flowchart showing an operation of the mobile communication system according to the second embodiment of the present invention. It is a figure for demonstrating the detail of the operation | movement which continues a telephone call by PHS by the timeout which concerns on the 2nd Embodiment of this invention. It is a figure for demonstrating the detail of the operation | movement which continues a telephone call by WLAN which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Communication control part 11 Call circuit 12 Information recording apparatus 100 Button telephone apparatus 200 Telephone 300 WLAN terminal 400 PHS terminal 500 Access point 600 Relay station 700 WLAN / PHS terminal

Claims (14)

A mobile communication system using a first mobile terminal and a second mobile terminal that can be accommodated in a button telephone device,
The first mobile terminal initiates a handover during a call with a telephone housed in a button telephone device,
The access point confirms that there is no response from the first mobile terminal and notifies the button telephone device that the handover has started,
The button telephone device starts calling the second mobile terminal to be handed over based on the setting information,
After the second mobile terminal answers the call, the key telephone device performs a handover by switching the call from the first mobile terminal to the second mobile terminal,
A timer for setting a predetermined time for initiating the handover;
The button telephone device starts calling the second mobile terminal after the predetermined time has elapsed,
If handover of the first mobile terminal is successful after starting the call of the second mobile terminal, call recovery by the first mobile terminal is performed and switching to the second mobile terminal is performed. stop,
Canceling the switching to the second mobile terminal is
After waiting for a predetermined response, after notifying handover switching of the first mobile terminal, requesting disconnection of the second mobile terminal, and continuing the call with the first mobile terminal A mobile communication system. The button telephone device includes a communication control unit that controls communication and an information recording device that records the setting information.
The communication control unit refers to the setting information recorded in the information recording device when detecting that the handover of the first mobile terminal is started,
The communication control unit calls the second mobile terminal by automatic call based on the setting information, and performs call switching when the received second mobile terminal responds to the incoming call. The mobile communication system according to claim 1, wherein the handover is executed according to the above.   3. The mobile communication system according to claim 1, wherein the information recording device records identification information of a handover source terminal and identification information of a handover destination terminal in association with each other as the setting information.   2. The first mobile terminal is a WLAN terminal, the second mobile terminal is a PHS terminal, and the handover is executed by switching from the WLAN terminal to the PHS terminal. 4. The mobile communication system according to any one of items 1 to 3.   The first mobile terminal is a PHS terminal, the second mobile terminal is a WLAN terminal, and the handover is executed by switching from the PHS terminal to the WLAN terminal. 4. The mobile communication system according to any one of items 1 to 3.   The first mobile terminal is a first PHS terminal, the second mobile terminal is a second PHS terminal, and the hand is switched by switching from the first PHS terminal to the second PHS terminal. The mobile communication system according to any one of claims 1 to 3, wherein an over is executed.   The first mobile terminal is a first WLAN terminal, the second mobile terminal is a second WLAN terminal, and the hand is switched from the first WLAN terminal to the second WLAN terminal. The mobile communication system according to any one of claims 1 to 3, wherein an over is executed. A mobile communication system using a dual mobile terminal having both a first function of a first mobile terminal that can be accommodated in a button telephone device and a second function of a second mobile terminal,
The first function of the first mobile terminal and the second function of the second mobile terminal are registered in the button telephone device,
Initiating a handover during a call by the first function of the first mobile terminal,
The access point confirms that there is no response from the first function of the first mobile terminal and notifies the button telephone device that the handover has started,
The dual mobile terminal initiates a handover of the first function of the first mobile terminal while making a call using the second function of the second mobile terminal,
The key telephone apparatus recognizes that the first mobile terminal and the second mobile terminal are the same mobile terminal, detects that it is a handover,
The button telephone device responds to the outgoing call by the second function of the second mobile terminal after the handover waiting time elapses,
Performing a handover by connecting the call partner of the first function of the first mobile terminal to the second function of the second mobile terminal;
A timer for setting a predetermined time for initiating the handover;
The button telephone device starts calling the second mobile terminal after the predetermined time has elapsed,
If handover of the first mobile terminal is successful after starting the call of the second mobile terminal, call recovery by the first mobile terminal is performed and switching to the second mobile terminal is performed. stop,
Canceling the switching to the second mobile terminal is
After waiting for a predetermined response, after notifying handover switching of the first mobile terminal, requesting disconnection of the second mobile terminal, and continuing the call with the first mobile terminal A mobile communication system.   The mobile communication system according to claim 8, wherein the first mobile terminal is a WLAN terminal, and the second mobile terminal is a PHS terminal.   The mobile communication system according to claim 8, wherein the first mobile terminal is a PHS terminal, and the second mobile terminal is a WLAN terminal.   The mobile communication system according to claim 8, wherein the first mobile terminal is a first PHS terminal, and the second mobile terminal is a second PHS terminal.   The mobile communication system according to claim 8, wherein the first mobile terminal is a first WLAN terminal, and the second mobile terminal is a second WLAN terminal. A mobile communication method using a first mobile terminal and a second mobile terminal that can be accommodated in a button telephone device,
The first mobile terminal initiates a handover during a call with a telephone housed in a button telephone device,
The access point confirms that there is no response from the first mobile terminal and notifies the button telephone device that the handover has started,
The button telephone device starts calling the second mobile terminal to be handed over based on the setting information,
After the second mobile terminal answers the call, the key telephone device performs a handover by switching the call from the first mobile terminal to the second mobile terminal,
A timer for setting a predetermined time for initiating the handover;
The button telephone device starts calling the second mobile terminal after the predetermined time has elapsed,
If handover of the first mobile terminal is successful after starting the call of the second mobile terminal, call recovery by the first mobile terminal is performed and switching to the second mobile terminal is performed. stop,
Canceling the switching to the second mobile terminal is
After waiting for a predetermined response, after notifying handover switching of the first mobile terminal, requesting disconnection of the second mobile terminal, and continuing the call with the first mobile terminal A characteristic mobile communication method. A mobile communication method using a dual mobile terminal having both a first function of a first mobile terminal that can be accommodated in a button telephone device and a second function of a second mobile terminal,
The first function of the first mobile terminal and the second function of the second mobile terminal are registered in the button telephone device,
Initiating a handover during a call by the first function of the first mobile terminal,
The access point confirms that there is no response from the first function of the first mobile terminal and notifies the button telephone device that the handover has started,
The dual mobile terminal initiates a handover of the first function of the first mobile terminal while making a call using the second function of the second mobile terminal,
The key telephone apparatus recognizes that the first mobile terminal and the second mobile terminal are the same mobile terminal, detects that it is a handover,
The button telephone device responds to the outgoing call by the second function of the second mobile terminal after the handover waiting time elapses,
Performing a handover by connecting the call partner of the first function of the first mobile terminal to the second function of the second mobile terminal;
A timer for setting a predetermined time for initiating the handover;
The button telephone device starts calling the second mobile terminal after the predetermined time has elapsed,
If handover of the first mobile terminal is successful after starting the call of the second mobile terminal, call recovery by the first mobile terminal is performed and switching to the second mobile terminal is performed. stop,
Canceling the switching to the second mobile terminal is
After waiting for a predetermined response, after notifying handover switching of the first mobile terminal, requesting disconnection of the second mobile terminal, and continuing the call with the first mobile terminal A characteristic mobile communication method.

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