JP2003324771A - Mobile communication system, network controller and communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile communication system wherein a receiver side terminal can inform a transmitter side terminal about it that the receiver side terminal is restored to a wireless communication available state when it happens and to provide a network controller thereof and the communication terminal thereof. <P>SOLUTION: The network controller 4 of the mobile communication system is provided with: a storage section 41 for storing a call request addressed to a transmission destination communication terminal 1b when wireless communication to the communication terminal 1b is disabled; and a restoration notice means 43 for searching whether or not a call request addressed to the transmission destination communication terminal 1b exists in the call requests stored in the storage section 41 and informing a transmission source communication terminal 1a transmitting the call request about it that the transmission destination communication terminal 1b is restored to a wireless communication available state when the call request exists. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system in which a source communication terminal and a destination communication terminal communicate with each other through a network control device, a network control device thereof, and a communication terminal thereof. .

[0002]

2. Description of the Related Art A mobile communication system of a mobile communication terminal typified by a mobile phone is a communication between a transmission source mobile communication terminal and a transmission destination mobile communication terminal via a radio base station, a switching device, and a network control device. A connection is made, and this connection allows communication between the source and destination terminals.

Generally, in such a mobile communication system,
For example, when a call is made from the terminal A to the terminal B, the network control device sends a calling signal to the destination terminal B. If there is no response from the terminal B to the calling signal for a certain period of time. It is determined that the connection has failed, the terminal A that is the transmission source is notified of the failure, and the series of processing ends. Here, "no response" means that the terminal B has been turned off, is out of the radio wave range, or is used in an operation mode such as an offline mode or a self mode in which radio waves are not transmitted and received. It means that the wireless transmission / reception is not normally performed. Hereinafter, these will be collectively referred to as the out-of-service state.

However, in such a mobile communication system, since the connection is unsuccessful, the processing is completed only by notifying the terminal A of the transmission source of the fact.
Even if the contact is important, there is a problem that the content is not transmitted to the destination terminal B and the user of the terminal B cannot know the content.

On the other hand, in the conventional mobile communication system disclosed in Japanese Unexamined Patent Publication No. 9-307962 and Japanese Unexamined Patent Publication No. 2000-349905, the terminal B outside the service area is used.
When a call request to the destination is made, the call request is accumulated in the network control device, and when the terminal B returns to the wireless communication available service state, the accumulated connection failure By notifying the terminal B of the call request, the contents can be transmitted to the destination terminal B later even if the connection fails.

FIG. 9 is a block diagram showing the configuration of such a conventional mobile communication system. The mobile communication system shown in FIG. 9 is of the current typical form of mobile communication system, and includes terminals (a mobile communication terminal 1a on the transmitting side and a mobile communication terminal 1b on the receiving side) that can be carried and carried by general users. It is composed of equipment on the network side connecting the terminals 1a and 1b. The equipment on the network side includes radio base stations 2a and 2b that transmit and receive radio signals to and from the terminals 1a and 1b, switching devices 3a and 3b that perform circuit switching between the terminals 1a and 1b, and call originating from the terminals 1a and 1b. The network control device 4 receives a call request and gives a connection instruction to the switching devices 3a and 3b.

Then, the network control device 4 stores a generated call request for each subscriber, and a storage unit 41 for which a wireless communication is not possible, when a terminal which has not been able to perform wireless communication returns to a state where the wireless communication is possible. The incoming call information notification unit 42 that notifies the terminal of the stored call origination request for connection failure.

Next, a communication method of the mobile communication system shown in FIG. 9 will be described. FIG. 10 is a diagram showing a schematic operation sequence relating to the communication method of the mobile communication system shown in FIG.

As shown in FIG. 10, when a call origination request is issued from the transmission side terminal 1a, a call setting signal is sent to the network control device 4 via the radio base station 2a and the switching device 3a. Here, the network control device 4 checks the position information of the destination terminal 1b of the transmission destination, which is currently registered, and instructs the exchange device 3a to indicate the connection destination exchange device 3b and issue a connection instruction.

Upon receiving the connection instruction, the switching apparatus 3a instructs the address of the receiving side terminal 1b to the switching apparatus 3b to which the receiving side terminal 1b on the other side belongs, performs circuit switching, and receives the connection. 3b delivers the paging signal to the receiving side terminal 1b through the radio base station 2b. And the wireless base station 2
In b, it is checked whether there is a response from the receiving terminal 1b for a certain period.

When the receiving side terminal 1b is out of the service area in which radio transmission / reception cannot be performed, such as when the receiving side terminal 1b is turned off or out of the radio range, there is no response from the receiving side terminal 1b even after a certain period of time. , In that case, the radio base station 2b
Determines that the receiving terminal 1b is out of the service area,
The receiving side terminal 1b is connected to the transmitting side terminal 1a via the exchange device 3b.
Sends out-of-service information notifying that it is out of service area, and at the same time notifies the network control device 4 of it. Receiving this information, the network control device 4 stores the call request for which the connection has failed in the storage unit 41.

[0012] After that, when the receiving side terminal 1b returns to the wireless communication enabled state by turning on the power or entering the radio wave range, the information that the receiving side terminal 1b has returned to the wireless transmission / reception service range is received from the receiving side terminal 1b. The position registration signal is transmitted to the network control device 4 via the radio base station 2b and the switching device 3b which have received the position registration signal.

When the network control device 4 receives this information,
The storage unit 41 is searched to check whether a call request has been received during the period outside the service area, and if there is a call request,
The incoming call information notification unit 42 sends the address information and the telephone number information of the receiving side terminal 1b to the exchange 3b, and the wireless base station 2
The telephone number information is notified to the receiving side terminal 1b via b. By doing so, the user of the receiving-side terminal 1b can know the telephone number information of the other party who received the call request during the period in which he / she was out of the service area in which the radio wave cannot be received.

[0014]

Since the conventional mobile communication system has been constructed as described above, the user of the receiving terminal can obtain the information of the call received while out of the service area. Since the user of does not always call the sender terminal again, the user of the sender terminal cannot know whether or not the content transmitted by the user of the receiver terminal has been read. It was

Further, since the user of the receiving terminal usually cannot know the requirements and urgency of each telephone, or whether the user of the transmitting terminal can answer the telephone at present, an unnecessary reply call is made. There was a risk that they would have to go in a hurry and repeat useless replying calls to each other.

The present invention has been made to solve the above problems, and when the receiving terminal returns to a wireless communication enabled state, a portable communication system capable of notifying the transmitting terminal of the fact, network control thereof. An apparatus and its communication terminal are provided.

Further, the present invention provides a portable communication system, a network control device for the same, and a communication terminal for allowing the user of the receiving side terminal to know the state of the user of the transmitting side terminal.

[0018]

A portable communication system according to the present invention includes a communication terminal, a switching device for performing connection exchange processing between the communication terminals, and a call from a source communication terminal to a destination communication terminal. A mobile communication system comprising a network control device that receives a request and issues a connection instruction to the switching device, wherein the network control device is capable of performing wireless communication with a communication terminal of the transmission destination. When the storage unit that stores the call request addressed to the communication terminal and the communication terminal that is the destination returns to a state in which wireless communication is possible, the call request stored in the storage unit is included in the call request of the transmission destination. Searches if there is a call request addressed to the communication terminal, and if there is, notifies the source communication terminal that originated the call request that the destination communication terminal has returned to a state in which wireless communication is possible. And a return notification means for performing.

Further, the network control device of the mobile communication system according to the present invention receives the call request to the communication terminal of the transmission destination from the communication terminal of the transmission source and issues a connection instruction to the switching device. A network control device, wherein the network control device stores a calling request addressed to the communication terminal when the communication communication to the transmission destination is impossible, and the communication terminal of the transmission destination. When returning to a state in which wireless communication is possible, it is searched whether or not there is a call request to the communication terminal of the transmission destination among the call requests stored in the storage unit,
In some cases, a return notification unit is provided to notify the communication terminal of the transmission source that issued the call request that the communication terminal of the transmission destination has returned to the state in which wireless communication is possible.

Further, the storage unit stores information for specifying a communication terminal permitted by the user of the transmission destination communication terminal or a communication terminal not permitted, and the return notifying means stores the information for specifying the communication terminal. Based on this, the notification may be given to the communication terminal that needs the notification.

Further, information on whether or not the notification is requested in response to the call request is stored in the storage unit, and the return notifying means, based on the information, notifies the communication terminal that needs the notification, The notification may be given.

Further, the communication terminal of the portable communication system according to the present invention holds a call request to the communication terminal of the transmission destination when the communication communication to the communication terminal of the transmission destination is impossible, and the communication terminal of the transmission destination is wireless. When the communication terminal returns to the communicable state, the communication terminal that communicates with the communication terminal of the transmission source is notified via the network control device that notifies the communication terminal of the transmission source that the notification is permitted. A communication terminal of a mobile communication system with which communication is performed, the setting means for setting whether or not to notify the communication terminal of the transmission source that the own terminal has returned to the wireless communication enabled state, and the network control device. And transmitting means for transmitting the contents set by the setting means.

Further, the communication terminal of the portable communication system according to the present invention holds a call request to the communication terminal of the transmission destination when the communication communication of the transmission destination is impossible, and the communication terminal of the transmission destination wirelessly communicates. When the communication terminal returns to the available state, the communication terminal communicates with the destination communication terminal via the network control device that notifies the communication terminal of the transmission source that needs to be notified that the communication terminal has returned to the wireless communication enabled state. Setting means for setting information indicating whether or not it is necessary to notify the own terminal that the communication terminal of the transmission destination has returned to the wireless communication enabled state, and the network control. And a transmission means for transmitting the above information to the device.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. FIG. 1 is a block diagram showing the configuration of the mobile communication system according to the first embodiment. In the figure, 1a is a transmission side terminal such as a mobile phone which a general user can carry and communicate with, and 1b is a reception side terminal such as a mobile phone with which a general user can carry and communicate. Here, for simplification of description, the description will be given on the assumption that the transmission side terminal (transmission source communication terminal) 1a and the reception side terminal (transmission destination communication terminal) 1b, but both the transmission side terminal 1a and the reception side terminal 1b can transmit and receive. Needless to say.

2a and 2b are radio base stations for transmitting and receiving radio signals to and from the terminals 1a and 1b, and 3a and 3b are terminals 1a and 1b.
A switching device 4 for performing a circuit switch between b and a network control device 4 which receives a call request from the terminals 1a, 1b and gives a connection instruction to the switching devices 3a, 3b.

The network control device 4 issues a call request to the receiver terminal 1b when wireless communication with the receiver terminal 1b is impossible (out of service area, etc.), that is, a call request that fails in connection. Storage unit 41 that stores the information for each subscriber
Then, when the receiving side terminal 1b returns to a state in which wireless communication is possible (such as within the service area), is there a calling request addressed to the receiving side terminal 1b among the calling requests stored in the storage unit 41? As return notifying means for notifying return information indicating that the receiving side terminal 1b has returned to the wireless communication enabled state (in the service area) to the transmitting side terminal 1a which has issued the call request, if any. The return information notification unit 43 of FIG.

As described above, the mobile communication system shown in FIG. 1 is based on a typical form of the current mobile phone system, and is a network connecting a mobile communication terminal which a user can carry and communicate with each terminal. It consists of the equipment on the side. The equipment on the network side includes radio base stations 2a and 2b, switching devices 3a and 3b,
The network control device 4 is used. Further, although the transmission side terminal 1a is described as a mobile communication terminal here, it may be a wired terminal like an ordinary telephone. In the case of a general telephone, the telephone is directly connected to the exchange without going through the radio base station.

Next, a communication method of the mobile communication system shown in FIG. 1 will be described. FIG. 2 is a diagram showing a schematic operation sequence relating to the communication method of the mobile communication system shown in FIG.

As shown in FIG. 2, when a call request is issued from the transmitting terminal 1a, a call setting signal is sent to the network control device 4 via the radio base station 2a and the switching device 3a. Here, the network control device 4 checks the position information of the destination terminal 1b of the transmission destination, which is currently registered, and instructs the exchange device 3a to indicate the connection destination exchange device 3b and issue a connection instruction.

Upon receiving the connection instruction, the switching device 3a instructs the address of the receiving terminal 1b to the switching device 3b to which the receiving terminal 1b on the other side belongs, performs circuit switching, and receives the connection. 3b delivers the paging signal to the receiving side terminal 1b through the radio base station 2b. And the wireless base station 2
In b, it is checked whether there is a response from the receiving terminal 1b for a certain period.

In the out-of-service state in which wireless transmission / reception cannot be performed, such as when the receiving side terminal 1b is turned off or out of the radio range, there is no response from the receiving side terminal 1b even after a certain period of time. , In that case, the radio base station 2b
Determines that the receiving terminal 1b is out of the service area,
The receiving side terminal 1b is connected to the transmitting side terminal 1a via the exchange device 3b.
Sends out-of-service information notifying that it is out of service area, and at the same time notifies the network control device 4 of it. Receiving this information, the network control device 4 stores the call request for which the connection has failed in the storage unit 41.

When the total number of stored call requests exceeds the maximum number that can be stored in the storage unit 41, the latest call information may not be recorded by deleting the oldest information in order. You shouldn't.

Thereafter, when the terminal 1b on the receiving side returns to a state in which wireless communication is possible, such as by turning on the power or entering the radio wave range, information indicating that the terminal 1b has returned to the service area in which wireless transmission and reception is possible is received from the terminal 1b on the receiving side. The location registration signal is transmitted to the network control device 4 via the wireless base station 2b and the switching device 3b.

When informing the network control device 4 that the receiving side terminal 1b is ready for wireless communication,
If the user on the receiving side does not hurry to make a resend request, does not want to notify the return to the service area, or wants to delay the return notification a little, if the user wants to selectively perform the processing, for example, Button for setting information (signal) to notify the information and the set information.
The communication terminal may be provided with a man-machine function having a transmission unit for transmitting to the communication terminal so that the user of the reception-side terminal 1b intentionally transmits by this function.

On the contrary, when it is desired to save the user's trouble every time, a known method such as a method of detecting that the vehicle has returned to the area and a returned area by a position registration signal transmitted from the terminal side is used. Alternatively, the call may be automatically transmitted regardless of the intention of the user of the receiving side terminal 1b. If the conventional location registration signal is not enough to cover all points of return, the location registration must always be performed when returning to the service area, or a signal dedicated to notification of area return information is newly added to the specification. do it.

In this way, when the information notifying that the receiving side terminal 1b has returned is transmitted, the network control device 4
Searches the storage unit 41 to see if a call request has been received during the period outside the service area, and if there is a call request, the return information notification unit 43 causes the switching device 3a to send to the sender terminal 1
The address information of a and the return information indicating that the receiving side terminal 1b has returned to the service area (for example, the telephone number information of the terminal that has transmitted the call request) are sent, and the wireless base station 2a
The return information is notified to the transmission side terminal 1a via.

At this time, if the sending side terminal 1a is out of the service area, the return notification processing may be terminated at that time, or the notification processing may be performed again when the sending terminal 1a returns to the service area. You may continue.
When the transmitting terminal 1a is moving in a wireless area, the corresponding switching device 3a and wireless base station 2a respectively correspond to the new area.

The sending side terminal 1a notified of the return information notifies the user of the returning information by making a normal telephone call with ringing sound, and the user of the sending side terminal 1a is notified. When the call is answered, a message notifying the return of the receiving terminal 1b to the service area is transmitted to the user. It should be noted that other methods such as making the ringtone sound once and immediately cutting it off so that the telephone number information of the receiving terminal 1b side remains in the incoming call history, and notifying in an e-mail format using a short message service etc. The user may be notified of the return of the receiving side terminal 1b.

As described above, when the receiving side terminal returns to the wireless communicable state, the transmitting terminal 1a can be notified of this.

In the first embodiment, when the network control device cannot perform wireless communication with the receiving side terminal, the receiving side terminal and the storage section for storing the calling request addressed to the receiving side communication terminal are wireless. When returning to the state where communication is possible, the calling request stored in the storage unit is searched for a calling request addressed to the receiving communication terminal, and if there is, the calling request is searched. Since the sending communication terminal that has sent out is provided with return notification means for sending return information indicating that the receiving communication terminal has returned to the wireless communication enabled state, the receiving communication terminal returns to the wireless communication enabled state. At this point, the user of the transmission-side communication terminal can know the return information (the reception-side communication terminal has returned to the state in which wireless communication is possible).

That is, even if the receiving side terminal (destination destination terminal) is out of the service area because the receiving side terminal (destination destination terminal) cannot receive the signal, the receiving side terminal returns to the service area after receiving the emergency. Now you can quickly know that you are ready to receive a call, improving the convenience of the entire system.

Embodiment 2. In the mobile communication system of the second embodiment, a call request for connection failure stored in the storage unit in the network control device in the mobile communication system described in the first embodiment is issued at a time point when a predetermined period has passed. It is designed to be deleted from the storage unit. The rest is the same as in the first embodiment.

That is, in the system (network control device), a period for leaving information in the storage unit is set in advance, and information that has passed this period is deleted from the storage unit.

Further, the system (network control device) has a man-machine function for accepting a button operation for the user to input a designated time, instead of setting a period for which information is left according to a predetermined rule. The man-machine function may be provided and the user may set the period for which information is left in the storage unit of the network control device. When set by the user, it should be set within an allowable range within the system.

By thus limiting the freshness of the service area return notification information of the other party's terminal, it is no longer necessary when returning to the service area, for example, after the terminal has been powered off for a long time. It is possible to eliminate the waste of notifying the return to the service area based on the old information.

Embodiment 3. The mobile communication system according to the third embodiment is for identifying a communication terminal permitted by a user of a destination communication terminal or a communication terminal not permitted in the storage unit in the mobile communication system described in the first and second embodiments. Information is stored, and based on this information, the return information is notified only to the communication terminal that needs the notification.
Note that, although an example of application to the mobile communication system of the first embodiment will be described below, the present invention can be similarly applied to the mobile communication system of the second embodiment.

FIG. 3 is a block diagram showing the configuration of the mobile communication system according to the third embodiment. In the figure, reference numeral 43 denotes a call request addressed to the receiver terminal 1b among the call requests stored in the storage unit 41 when the receiver terminal 1b returns to a state in which wireless communication is possible (state in service area, etc.). If there is, and based on the terminal information (information for identifying the terminals that should be notified or the communication terminals that should not be notified), the return information (the destination Information indicating that the communication terminal has returned to a state in which wireless communication is possible)
Is a return information notifying unit as a return notifying unit that notifies

Reference numeral 44 is a notification terminal registration unit for registering terminal information for specifying a terminal to be notified of return information or a communication terminal not to be notified. The terminal information registered by the notification terminal registration unit 44 may be, for example, any information such as a terminal number or the like for identifying a terminal that permits notification or a terminal that does not permit notification. It is stored in the storage unit 41 in a list format, for example.

The terminal information can be set, for example, by collectively setting permission or disapproval of transmission of the return information of the own terminal to all transmitting terminals, or by setting a predetermined group. A method of setting permission / prohibition in units of belonging terminals may be used. The rest is the same as the mobile communication system shown in FIG.

Next, a communication method of the mobile communication system shown in FIG. 3 will be described. FIG. 4 is a diagram showing a schematic operation sequence relating to the communication method of the mobile communication system shown in FIG.

As shown in FIG. 4, the operation up to the transmission of information notifying that the receiving side terminal 1b has returned from the receiving side terminal 1b to the network control device 4 will be described in the first embodiment.
Is the same as.

In this way, when the information notifying that the receiving side terminal 1b has returned is transmitted in the same manner as in the first embodiment, the network control device 4 searches the storage unit 41 and is out of the service area. Check whether the call request was received during the period. Then, when there is a call request, it is further determined based on the terminal information whether or not to notify the terminal that has transmitted the call request of the return information.

If the terminal information is the information for specifying the terminal to be notified, the terminal that has transmitted the call request is the terminal described in the terminal information, and the terminal is notified.
On the other hand, if the terminal information is information that identifies a terminal that should not be notified, it may be determined that the terminal that has transmitted the call request is a terminal to notify when the terminal is not the terminal described in the terminal information.

As a result of such a determination, when it is determined that the terminal is the terminal to notify, the return notification processing unit 43 sends the address information and the return information of the transmitting terminal 1a to the exchange 3a, and the wireless base station Sending side terminal 1a via station 2a
Notify the return information to. The method of notifying the user of the terminal of the return information may be the same as in the first embodiment.

By the above, the receiving side terminal 1b
The user does not notify the terminals that he / she does not want to notify, and only the terminals that may notify the user are notified that the communication is possible.

In this embodiment, the return information is notified only to the communication terminals that need to be notified based on the terminal information that specifies the communication terminals that should be notified of the return information or the communication terminals that should not be notified. It is possible to prevent the privacy information indicating the state of the communication terminal of the user from being sent indiscriminately to a large number of unspecified sources.

Further, since the network control device is provided with the notification terminal registration unit for registering the terminal information in advance and the registration of the terminal information is carried out by this notification terminal registration unit, every time when the communication terminal of the transmission destination is restored to the service area. Since it is not necessary to send the notification-permitted party information to the network side, it is possible to reduce the amount of transmission data when the return notification is performed.

In this embodiment, the notification terminal registration means 44 allows the network control device 4 to register the terminal information. For this registration processing, a terminal as shown in FIG. 5 is used. Alternatively, the terminal information setting operation may be performed on the receiving side terminal 1b, and the user of the receiving side communication terminal may arbitrarily transmit whether or not to notify the return information to the network control device.

FIG. 5 is a diagram showing a communication terminal in which the terminal information can be set, and is a diagram showing an example of the receiving side terminal of the mobile communication system shown in FIG. In the figure, 11 is a setting means for setting whether or not the return information may be notified to the communication terminal of the transmission destination when the own terminal returns to the wireless communication enabled state, and 12 is the setting means 11 for the network control device 4. It is a transmission / reception means for transmitting the set contents.

As described above, the setting means 1 is added to the receiving side terminal 1b.
1. By providing a man-machine function including the transmitting / receiving means 12 and transmitting information indicating whether or not return information can be notified to the network control device 4, the terminal information is received by the receiving terminal 1 instead of the network control device 4.
It can be set with b.

The terminal information is stored in the storage unit 4 of the network controller 4.
1 is not stored in advance, and when the receiving side terminal 1b restores from the outside of the service area, the receiving side terminal 1b transmits information (terminal information) indicating whether or not the return information can be notified to the network control device 4. By doing so, the network control device 4 may determine the notification to the transmitting terminal 1a based on this terminal information. At this time, the terminal information is the temporary network control device 4
Will be stored in a part of the buffer of the storage unit of.

Further, in this embodiment, the storage unit stores information for specifying the communication terminal permitted or not permitted by the user of the transmission destination communication terminal. However, the storage unit stores the information. Also, information for identifying a communication terminal permitted by the user of the communication terminal of the transmission source or a communication terminal not permitted is stored, and based on this information, return information is notified only to the communication terminal requiring notification. Good. In addition,
This information may be set either on the communication terminal of the transmission source or on the network control device side.

Fourth Embodiment In the mobile communication system according to the fourth embodiment, the storage unit of the network control device in the mobile communication systems according to the first to third embodiments is notified of whether or not the contents need to be notified of the return together with the call request. The availability information is also stored, and the return information is notified only when the notification availability information indicates that the content needs to be notified of the return. Note that, although an example in which the mobile communication system according to the first embodiment is applied will be described below, the present invention can be similarly applied to the mobile communication systems according to the second and third embodiments.

FIG. 6 is a block diagram showing the configuration of the mobile communication system according to the fourth embodiment. In the figure, reference numeral 41 indicates a call request to the communication terminal 1b generated when wireless communication with the receiving terminal 1b is impossible (out of service area, etc.), and notifies the communication terminal that transmitted this call request of the return. It is a storage unit that stores notification permission information indicating whether it is necessary.

Reference numeral 43 denotes a calling request addressed to the receiving side terminal 1b among the calling requests stored in the storage section 41 when the receiving side terminal 1b returns to a state in which wireless communication is possible (state within service area, etc.). If there is a return notification permission information, it is determined whether the return notification availability information needs to notify the communication terminal that transmitted this call request of the return. The receiving side terminal 1b is a return notifying means for notifying return information to the communication terminal that issued the call request. In addition, other than that, the mobile communication system shown in FIG.

FIG. 7 is a diagram showing an example of a transmission side terminal of the mobile communication system shown in FIG. 6, and is a diagram showing a communication terminal to which notification permission / prohibition information can be set. In the figure, 13 is a setting means for setting whether or not it is necessary to notify the own terminal of the return information when the receiving side terminal 1b returns to a state where wireless communication is possible.
Reference numeral 4 is a transmission / reception means for transmitting the contents set by the setting means 13 to the network control device 4.

In this way, the setting means 1 is added to the sending terminal 1a.
3. By providing the man-machine function including the transmission / reception means 14, the network control device 4 is provided with the communication availability information as to whether or not it is necessary to notify the own terminal of the return information when returning to the wireless communication enabled state.
And can be stored in the storage unit 41. Note that the user of the communication terminal may make an input as a normal basic operation in advance, or in addition, may make an input each time a call request is made. Furthermore, both pieces of information may be used together.

Next, a communication method of the mobile communication system shown in FIG. 6 will be described. FIG. 8 is a diagram showing a schematic operation sequence relating to the communication method of the mobile communication system shown in FIG.

As shown in FIG. 8, the operation up to the transmission of the information notifying that the receiving side terminal 1b has returned from the receiving side terminal 1b to the network control device 4 will be described in the first embodiment.
Is the same as.

In this way, when the information notifying that the receiving side terminal 1b has returned is transmitted in the same manner as in the first embodiment, the network control device 4 searches the storage unit 41 and is out of the service area. Check whether the call request was received during the period. Then, when there is a call request, it is further determined whether the return notification availability information needs to notify the communication terminal that has transmitted this call request of the return.

If the result of this determination is that it is necessary, the return notification processing unit 43 sends the address information and return information of the sending side terminal 1a to the exchange 3a, and the sending side terminal 2a is sent via the radio base station 2a. The return information is notified to 1a.

By the above, the receiving side terminal 1b
Does not notify those that do not need to be notified,
Only when it is necessary to notify, it is possible to notify that communication is possible.

Further, in this embodiment, the transmission side terminal always sends the notification permission / prohibition information, but it transmits only when the notification is permitted or only when the notification is not permitted and is stored in the network control device. Alternatively, the calling request in the case of not being notified may not be stored in the storage unit of the network control device. Further, in addition to the request permission / prohibition setting as a basic operation, the request permission / prohibition with a high priority may be set depending on the degree of each call.

Further, instead of transmitting the notification permission / prohibition information at the time of communication as in this embodiment, it may be transmitted to the network control device in advance. Further, different settings may be made according to the destination telephone number, and the notification of return to the service area may be requested only when a call is made to a specific destination.

In this embodiment, in addition to the call request, the return notification enable / disable information indicating whether or not the return needs to be notified is also stored in the storage unit of the network control device. Only when the information indicates that it is necessary to notify the return, the mobile communication terminal is notified that it has returned to the state in which wireless communication is possible. Depending on the circumstances, it is possible to prevent unnecessary notification information from being returned when it is not necessary to receive a return notification.

Further, by making a call after checking the communicable state of the other terminal in advance before making a call, it is possible to prevent from being notified that the other terminal is out of the service area after making a call. Is possible.

[0077]

The portable communication system according to the present invention receives a communication terminal, a switching device for performing connection exchange processing between the communication terminals, and a call origination request addressed to the communication terminal of the transmission destination from the communication terminal of the transmission source. A mobile communication system including a network control device for instructing a connection to the exchange device, wherein the network control device addresses a communication terminal when the wireless communication with the communication terminal of the transmission destination is impossible. When the storage unit that stores the call request and the communication terminal of the transmission destination return to a state in which wireless communication is possible, the call request stored in the storage unit is addressed to the communication terminal of the transmission destination. Return notification means for searching whether there is a call request and, if there is, for notifying the communication terminal of the sender of the call request that the communication terminal of the above destination has returned to the wireless communication enabled state Since it is equipped with Upon return line communicable state, the user of the transmission source communication terminal, the communication terminal of the destination can know that has returned to a state of being capable of wireless communication.

Further, the network control device of the mobile communication system according to the present invention receives the call request to the communication terminal of the transmission destination from the communication terminal of the transmission source and issues the connection instruction to the switching device. A network control device, wherein the network control device stores a calling request addressed to the communication terminal when the communication communication to the transmission destination is impossible, and the communication terminal of the transmission destination. When returning to a state in which wireless communication is possible, it is searched whether or not there is a call request to the communication terminal of the transmission destination among the call requests stored in the storage unit,
In some cases, since the communication terminal of the transmission source that issued the call request is provided with return notification means for notifying that the communication terminal of the transmission destination has returned to the state in which wireless communication is possible, When the communication terminal returns to the state where wireless communication is possible,
The user of the communication terminal of the transmission source can know that the communication terminal of the transmission destination has returned to the state in which wireless communication is possible.

Further, the storage section stores information for specifying a communication terminal permitted by the user of the communication terminal of the transmission destination or a communication terminal not permitted, and the return notifying means stores the information for specifying the communication terminal. Based on this, when the above notification is given to the communication terminal that needs the notification, it is possible to prevent the privacy information, which is the status of the communication terminal of itself, from being sent indiscriminately to a large number of unspecified sources.

Further, information on whether or not to request the notification in response to the call request is stored in the storage unit, and the return notifying means, based on the information, notifies the communication terminal that needs the notification, When making the above notification, it is possible to prevent the communication terminal from receiving an unnecessary notification.

Further, the communication terminal of the portable communication system according to the present invention holds a call request to the communication terminal when the wireless communication to the communication terminal of the transmission destination is impossible, and the communication terminal of the transmission destination is wireless. When the communication terminal returns to the communicable state, the communication terminal that communicates with the communication terminal of the transmission source is notified via the network control device that notifies the communication terminal of the transmission source that the notification is permitted. A communication terminal of a mobile communication system with which communication is performed, the setting means for setting whether or not to notify the communication terminal of the transmission source that the own terminal has returned to the wireless communication enabled state, and the network control device. In addition, since it is provided with a transmitting means for transmitting the contents set by the setting means, it is possible to prevent the privacy information indicating the state of the communication terminal of the user from being sent indiscriminately to a large number of unspecified sources. In That.

Further, the communication terminal of the mobile communication system according to the present invention holds a call request to the communication terminal of the transmission destination when the communication communication to the communication terminal of the transmission destination is impossible, and the communication terminal of the transmission destination communicates wirelessly. When the communication terminal returns to the available state, the communication terminal communicates with the destination communication terminal via the network control device that notifies the communication terminal of the transmission source that needs to be notified that the communication terminal has returned to the wireless communication enabled state. Setting means for setting information indicating whether or not it is necessary to notify the own terminal that the communication terminal of the transmission destination has returned to the wireless communication enabled state, and the network control. Since the device is provided with the transmitting means for transmitting the above information, it becomes possible to prevent the communication terminal from receiving an unnecessary notification.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a schematic operation sequence relating to a communication method of the mobile communication system shown in FIG.

FIG. 3 is a block diagram showing a configuration of a mobile communication system according to a third embodiment of the present invention.

4 is a diagram showing a schematic operation sequence relating to a communication method of the mobile communication system shown in FIG.

5 is a diagram showing an example of a receiving side terminal of the mobile communication system shown in FIG.

FIG. 6 is a block diagram showing a configuration of a mobile communication system according to a fourth embodiment of the present invention.

7 is a diagram showing an example of a transmission side terminal of the mobile communication system shown in FIG.

8 is a diagram showing a schematic operation sequence relating to a communication method of the mobile communication system shown in FIG.

FIG. 9 is a block diagram showing a configuration of a conventional mobile communication system.

10 is a diagram showing a schematic operation sequence relating to a communication method of the mobile communication system shown in FIG.

[Explanation of symbols]

1a Sending side terminal 1b Receiving side terminal 2a, 2b Radio base station 3a, 3b Switching apparatus 4 Network control apparatus 11, 13 Setting means 12, 14 Transmitting / receiving means 41 Storage section 42 Incoming information notification section 43 Return information notification section 44 Notification terminal registration Department

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5K015 AB01 AE02 AF03 AF09 FA01                       FA05 FA07                 5K024 AA36 AA41 AA62 CC01 CC11                       DD02 DD04 GG03                 5K067 AA21 AA25 BB04 BB21 DD11                       DD44 DD51 EE02 EE10 EE16                       FF02 FF16 FF17 GG00 HH22                       HH24

Claims (6)

[Claims] 1. A communication terminal, an exchange device for performing connection exchange processing between the communication terminals, and a connection instruction to the exchange device upon receipt of a call request from the source communication terminal to the destination communication terminal. A mobile communication system including a network control device for performing, wherein the network control device stores a call request addressed to the communication terminal when wireless communication with the communication terminal of the transmission destination is impossible. , When the communication terminal of the transmission destination returns to a state in which wireless communication is possible, it is searched whether or not there is a call request to the communication terminal of the transmission destination in the call request stored in the storage unit. In some cases, the communication terminal of the transmission source that has issued the call request is provided with return notification means for notifying that the communication terminal of the transmission destination has returned to a state in which wireless communication is possible. Mobile communication system. 2. A network control device of a mobile communication system, which receives a call request from a source communication terminal to a destination communication terminal and issues a connection instruction to a switching device, wherein the network control device comprises: A storage unit for storing a call request addressed to the communication terminal when the wireless communication to the communication terminal of the transmission destination is impossible, and the storage when the communication terminal of the transmission destination returns to a wireless communication enabled state. Search for a call request destined for the destination communication terminal among the call requests stored in the section, and if there is, send the above to the source communication terminal that issued the call request. A network control device for a mobile communication system, comprising return notification means for notifying that the previous communication terminal has returned to a wireless communication enabled state. 3. The storage unit stores information for identifying a communication terminal permitted by a user of the transmission destination communication terminal or a communication terminal not permitted by the user, and the return notification means identifies the communication terminal. 3. The network control device for a mobile communication system according to claim 2, wherein the notification is made to a communication terminal that needs notification based on the information. 4. The storage section stores information as to whether or not to request the notification in response to the call request, and the return notification means is a communication that requires notification based on the information. The terminal is informed of the notification.
A network control device of the mobile communication system described. 5. When a wireless communication with a destination communication terminal is impossible, a call request to the communication terminal is held,
When the destination communication terminal returns to the wireless communication enabled state, the communication control terminal notifies the source communication terminal of which the notification is permitted to return to the wireless communication enabled state via the network control device. A communication terminal of a mobile communication system in which communication with the communication terminal of the transmission source is performed, and whether or not to notify the communication terminal of the transmission source that the own terminal has returned to the state where wireless communication is possible is set. A communication terminal of a mobile communication system, comprising: setting means; and transmitting means for transmitting the contents set by the setting means to the network control device. 6. A method for holding a call request to a communication terminal when the wireless communication to the communication terminal is impossible,
When the destination communication terminal returns to the wireless communication enabled state, the destination communication terminal notifies the communication terminal of the transmission source that the communication terminal has returned to the wireless communication enabled state via the network control device. A communication terminal of a mobile communication system that communicates with another communication terminal, and sets information indicating whether or not it is necessary to notify its own terminal that the communication terminal of the above destination has returned to the state in which wireless communication is possible. A communication terminal of a mobile communication system, comprising: setting means for setting and transmitting means for transmitting the information to the network control device.