JP2009111778A - Communication terminal and server - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To transfer call arrival information addressed to a communication terminal which is out of range, in real time, as much as possible, by forwarding the call arrival information from a server that has stored the call arrival information, to the communication terminal out of the range via communication terminals belonging to the same group. <P>SOLUTION: A communication terminal 100 comprises an antenna 300, a WLAN signal processing section 310 and a WLAN protocol processing section 320, which function as an ad-hoc communication section; an antenna 330, an EV-DO signal processing section 340 and an EV-DO protocol processing section 350, which function as a broadband communication section; a storage section 360; and a control section 370, which controls to store call arrival information (call-arrival notification) received from a base station by the broadband communication section in the storage section 360, when the relevant call arrival information is addressed to another communication terminal, and to search for the other communication terminal, by means of the ad-hoc communication section, if communication performed by the broadband communication section is disabled, and the call arrival information addressed to the other communication terminal is stored in the storage section 360. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a communication terminal that can use ad hoc communication and wide area communication, and a server that manages incoming information of a communication terminal that can perform ad hoc communication and wide area communication.

  Incoming voice calls to out-of-service communication terminals (mobile devices) in a communication system such as CDMA2000 1x EV-DO (hereinafter referred to as 1x) are generally as follows. For example, as shown in FIG. 20, the communication terminal 110 belongs to the base station (BS) 130, the communication terminal 120 belongs to the base station (BS) 140, and the carrier network 145 has a call control server (MSC) 150 that performs call control. As shown in FIG. 21, in a communication system having an SMS center server 160 that handles SMS (Short Message Service), a case where the communication terminal 120 is in an out-of-service area such as a basement of a building is assumed.

At this time, as shown in the operation sequence diagram of FIG. 22, when voice transmission is performed from the communication terminal 110 to the communication terminal 120, the voice transmission is transmitted to the MSC 150 that performs call control, and the MSC 150 seems to exist in the communication terminal 120. If the communication terminal 120 performs an incoming voice call via the BS 140, the communication terminal 120 is out of service area and therefore does not respond to the incoming voice call from the MSC 150, and the voice transmission fails. Therefore, the MSC 150 notifies the SMS center server 160 that provides the SMS service of an incoming call notification indicating that there is an incoming voice call, and the SMS center server 160 generates an incoming call notification message by SMS and stores it in the SMS database (DB). save. Thereafter, when the communication terminal 120 returns to the area within the BS 140 (such as the ground), the MSC 150 that detects the area return issues an SMS transmission instruction for an incoming call notification indicating that the SMS center server 160 has received a voice call. The user of the communication terminal 120 that has received the incoming call notification by SMS can know from the incoming call history display that there has been an incoming voice call.
In addition, there exists a thing of patent document 1 as a prior art regarding the incoming call control of the communication terminal in a communication system out of service area.
JP 2005-12265 A

  When the communication terminal 120 is out of the service area for a long time in the communication system shown in FIG. 20, the communication terminal 120 is notified to the user of the communication terminal that a voice call or mail has been received until the communication terminal 120 returns to the service area. I can't. Therefore, it is necessary to return to the area in the area regularly to be able to receive a call in order to check whether or not there is an incoming call, particularly in a situation where the user who owns the communication terminal is waiting for an emergency contact. Therefore, as shown by a dotted arrow in FIG. 21, it frequently travels between the out-of-service area and the in-service area, which is troublesome, and the user of the communication terminal 120 outside the service area can obtain the incoming call information in real time. Can not.

  The present invention transmits (transfers) incoming call information from a server storing incoming call information to a communication terminal outside the service area via a communication terminal belonging to the same group, so that the call reception information for the communication terminal outside the service area can be transmitted in real time as much as possible. An object is to provide a technology (communication terminal and server) for transmission.

  To achieve the above object, a communication terminal according to claim 1 of the present invention includes an ad hoc communication unit that performs ad hoc communication, a wide area communication unit that performs communication via a base station, and a storage unit that stores various types of information. When the incoming information received from the base station in the wide area communication unit is incoming information addressed to another communication terminal, the incoming information is stored in the storage unit, and communication by the wide area communication unit becomes impossible In this case, it is determined whether incoming information addressed to the other communication terminal is stored in the storage unit. If incoming information addressed to the other communication terminal is stored in the storage unit, the ad hoc communication is performed. And a control unit that controls to execute a search for the other communication terminal by the unit.

  As a preferred example of the communication terminal according to claim 1 of the present invention, when the other communication terminal is found by the search, an incoming call addressed to the other communication terminal stored in the storage unit in the other communication terminal When the information is transmitted via the ad hoc communication unit and the other communication terminal is found by the search, the identification information of the other communication terminal is obtained via the ad hoc communication unit, and the obtained identification is obtained. If the information matches the identification information included in the incoming information for the other communication terminal stored in the storage unit, the incoming call for the other communication terminal stored in the storage unit in the other communication terminal Information may be transmitted through the ad hoc communication unit.

  To achieve the above object, a communication terminal according to claim 4 of the present invention includes an ad hoc communication unit that performs ad hoc communication, a wide area communication unit that performs communication via a base station, a storage unit that stores incoming information, When incoming information is received from another communication terminal via the ad hoc communication unit, if the same incoming information as the received incoming information is not stored in the storage unit, the incoming information An incoming call notification unit for performing incoming call notification based on the above.

  As a preferred example of the communication terminal according to claim 4 of the present invention, when the ad hoc communication unit receives the incoming information from another communication terminal via the ad hoc communication unit, it is the same as the received incoming information. If the incoming call information is stored in the storage unit, the incoming call notification based on the incoming call information may not be performed.

  In order to achieve the above object, a server according to claim 6 of the present invention receives storage information for storing identification information of a plurality of communication terminals as a group, and reception information due to failure of reception for a predetermined communication terminal from a call control server. And receiving information from the call control server, it is determined whether or not the identification information of the destination communication terminal of the incoming information is stored in the storage unit, and the identification information of the destination communication terminal of the incoming information Is stored in the storage unit, the control for controlling to transmit the incoming call information to communication terminals corresponding to other identification information constituting the group to which the identification information of the destination communication terminal of the incoming call information belongs And a portion.

  According to the present invention, by receiving (transferring) the incoming call information from the server that received the incoming call information to the out-of-service communication terminal via the communication terminal belonging to the same group, it is possible to receive the incoming information for the out-of-service communication terminal. Can be transmitted in real time as long as possible.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram illustrating a network configuration of a mobile communication system according to the first embodiment of this invention. The mobile communication system of the present invention includes a base station (BS) 190 and a communication terminal (mobile device) 160 belonging to the BS 190, a base station (BS) 200, a communication terminal (mobile device) 100 and a communication terminal (mobile) ) 180, a call control server (MSC) 210 that controls call control, an SMS center server 220 that handles SMS, a location server (LS) 230 in which location information of communication terminals is registered, and a carrier on which these exist Network 240. In the following description, the communication terminal 160 belonging to the BS 190 is a communication terminal that performs voice transmission, and the communication terminal 180 belonging to the BS 200 is a communication terminal of the other party (incoming side) of the voice transmission. It is assumed that the communication terminal 100 belonging to the BS 200 and existing in the non-service area is in the service area.

As the communication terminal 100 and the communication terminal 180, those having the configuration shown in the block diagram of FIG. 2 are used. That is, the communication terminal 100 and the communication terminal 180 are connected to the antenna 300, the WLAN signal processing unit 310 and the WLAN protocol processing unit 320 (hereinafter referred to as the WLAN communication unit) sequentially connected to the antenna 300, the antenna 330, and the antenna 330. EV-DO signal processing unit 340 and EV-DO protocol processing unit 350 (hereinafter referred to as wide area communication unit), which are sequentially connected, and WLAN protocol processing unit 320, EV-DO protocol processing unit 350 and storage unit 360 are connected. And a control unit 370.
The storage unit 360 includes an SMS database (DB) 361 containing SMS data, an SMS temporary database (DB) 362 containing SMS temporary data, and a group containing telephone numbers (telephone numbers) of communication terminals belonging to the same group. And a telephone number database (DB) 363. As the communication terminal 160 on the transmission side, the one in which the antenna 300, the WLAN signal processing unit 310, and the WLAN protocol processing unit 320 are omitted from the configuration in FIG. 2 can be used, but the same as the communication terminal 100 and the communication terminal 180. May be used.

  The control unit 370 includes an SMS control unit 371, a group control unit 372, and an out-of-service determination unit 373. The SMS control unit 371 includes an SMS duplication detection unit 374 that detects duplication of SMS data (incoming call notification, etc.), an SMS destination judgment unit 375 that judges an SMS data destination, and an SMS transfer processing unit that performs SMS data transfer processing 376 and an SMS processing unit 377 for processing an SMS message. The group control unit 372 includes a telephone number registration processing unit 378 that performs registration processing of telephone numbers of communication terminals belonging to the group, a telephone number exchange processing unit 379 that performs processing of exchanging telephone numbers of communication terminals belonging to the group, A telephone number determination processing unit 380 that performs a determination process of a telephone number of a communication terminal to which the terminal belongs.

  The storage unit 360 functions as a storage unit that stores various information including the SMS database 361, the SMS temporary database 362, the group telephone number database 363, and incoming call information.

In communication terminal 180, when receiving information from communication terminal 100 by ad hoc communication via WLAN communication unit, control unit 370 does not store the same incoming information as the received incoming information in storage unit 360. It functions as an incoming call notification unit that performs incoming call notification based on the incoming call information as a new incoming call. In addition, when receiving the incoming information from the communication terminal 100 by ad hoc communication via the WLAN communication unit, the control unit 370 stores the same incoming information as the received incoming information in the storage unit 360. It has a function of ignoring incoming call information received from the communication terminal 100 by the ad hoc communication.
In communication terminal 100, when incoming information received from base station 200 in the wide area communication unit is incoming information addressed to another communication terminal 180, control unit 370 stores the incoming information in storage unit 360 and performs wide area communication. When communication by the communication unit becomes impossible, it is determined whether or not incoming information addressed to another communication terminal is stored in the storage unit 360, and incoming information addressed to another communication terminal is stored in the storage unit 360. If so, it functions as a control unit that controls to search for another communication terminal by ad hoc communication via the WLAN communication unit. In addition, when other communication terminal 180 is found by the search, control unit 370 transmits incoming information addressed to communication terminal 180 stored in storage unit 360 to other communication terminal 180 by ad hoc communication via the WLAN communication unit. It has the function to do. When the other communication terminal 180 is found by the search, the control unit 370 acquires the identification information of the other communication terminal 180 via the WLAN communication unit, and the acquired identification information and the communication stored in the storage unit 360. When the identification information included in the incoming information addressed to the terminal 180 matches, the function of transmitting the incoming information addressed to the communication terminal 180 stored in the storage unit 360 to the communication terminal 180 by ad hoc communication via the WLAN communication unit. It is what you have.

The antenna 300, the WLAN signal processing unit 310, and the WLAN protocol processing unit 320 function as an ad hoc communication unit that performs ad hoc communication. In addition, as a communication method for receiving an incoming notification from another communication terminal, in addition to ad hoc communication in which devices directly communicate with each other without using an access point in a wireless LAN, similar methods such as “Bluetooth” and “Felica” are used. A range wireless method can be considered, but WLAN ad hoc communication is optimal in that it communicates seamlessly without making the user feel the need to operate the communication terminal directly so that initial registration and standby settings are not required. is there.
The antenna 330, the EV-DO signal processing unit 340, and the EV-DO protocol processing unit 350 function as a wide area communication unit that performs communication via a base station.

  As the SMS center server 220, one having the configuration shown in the block diagram of FIG. 3 is used. That is, the SMS center server 220 includes an Ethernet (registered trademark) signal processing unit 400 and an Ethernet (registered trademark) protocol processing unit 410 that are sequentially connected to the carrier network 240. And a control unit 420 and a storage unit 430.

  The Ethernet (registered trademark) signal processing unit 400 and the Ethernet (registered trademark) protocol processing unit 410 fail to receive calls from a call control server (MSC) 210 to a predetermined communication terminal. It functions as a receiving unit that receives incoming information.

The control unit 420 includes an area control unit 440, an SMS control unit 450, and a group control unit 460. The area control unit 440 includes an area determination processing unit 441 that determines which area the target communication terminal belongs to, and an area information processing unit that performs information processing of area information that is information related to the area to which the target communication terminal belongs. 442. The SMS control unit 450 includes an SMS processing unit 451 that performs SMS processing, an SMS transmission unit 452 that transmits SMS, and an SMS reception unit 453 that receives SMS. The group control unit 460 includes a telephone number registration processing unit 461 that performs registration processing of a telephone number (phone number) of a target communication terminal, and a telephone number that performs determination processing of the telephone number (phone number) of the target communication terminal. A determination processing unit 462.
When receiving the incoming information from the call control server (MSC) 210, the control unit 420 determines whether the identification information of the destination communication terminal of the incoming information is stored in the storage unit 430, and determines the destination communication terminal of the incoming information. If the identification information is stored in the storage unit 430, the incoming information is transmitted to the communication terminals corresponding to other identification information constituting the group to which the identification information of the destination communication terminal of the incoming information belongs. It has a function to control. The control unit 420 has a function of grouping a plurality of communication terminals according to settings from the communication terminals.

  The storage unit 430 includes an SMS database (DB) 431 that stores SMS data, and a group telephone number database (DB) 432 that stores telephone numbers of communication terminals belonging to the group. The storage unit 430 functions as a storage unit that stores identification information of a plurality of communication terminals as a group.

  4 to 6 are diagrams conceptually showing the arrangement of base stations, cells and communication terminals applicable to the mobile communication system of the present invention. Each hexagonal block in each figure indicates a base station cell (range in which radio waves reach), and a base station (not shown) is installed in the center of the cell. 4 to 6 are different in operation when the SMS center server transmits an incoming call notification SMS (hereinafter also referred to as SMS (incoming call notification)), as will be described later.

  The example shown in FIG. 4 shows an arrangement in the case where “area determination” is not performed. The communication terminal 10 and the communication terminal 20 exist in one cell, and communication is performed in another cell separated from the position. The terminal 30 exists, and the communication terminal 40 exists in another cell that is further away from the location. In this arrangement, when a call to the communication terminal 10 occurs when the communication terminal 10 is out of service area, all communication terminals other than the communication terminal 10, that is, the communication terminal 20, the communication terminal 30, and the communication terminal 40 receive an incoming call. When the notification is transmitted by SMS, the SMS is also transmitted to the communication terminal 40 which is a communication terminal far away from the communication terminal 10 that is out of service area. Since there is a low possibility that incoming information is passed from the communication terminal 40 to the communication terminal 10, not only is a useless SMS transmitted, but a load is also imposed on the network side. Therefore, the arrangements of FIGS. 5 and 6 are configured to perform “area determination” so as to reduce the load on the network side.

When there is an incoming call from the carrier network to the communication terminal, a page message is sent from the base station to the communication terminal. At this time, the communication terminal refers to the bit for its destination in the page message, and recognizes that there is an incoming call if the bit is set. This page message is not transmitted only from a specific base station, but is transmitted simultaneously from grouped base stations having the same group ID.
In the present invention, using this page message, an SMS (incoming notification) is transmitted to a communication terminal registered in another base station having the same group ID as the base station registered by the destination communication terminal. Yes. In the examples shown in FIGS. 5 and 6 below, “area determination” is used as a determination condition for sending SMS (incoming call notification).

The example shown in FIG. 5 shows an arrangement when one cell and six surrounding cells (shown by hatching in the figure) are cells corresponding to base stations having the same group ID. In the illustrated example, the communication terminal 10 and the communication terminal 20 exist in one cell of a certain group, the communication terminal 30 exists in another cell that is distant from the same group, and the positions of different groups The communication terminal 40 exists in another cell further away. The communication terminal 10, the communication terminal 20, and the communication terminal 30 are assumed to be registered in the registration message (Registration Massage) at the base station in the cell where the individual communication terminals exist, and the communication terminal 10 is out of range, It is assumed that other communication terminals (communication terminal 20, communication terminal 30, and communication terminal 40) are within a range.
In this arrangement, when an out-of-service communication terminal 10 receives an incoming call, the communication terminal 20 and the communication terminal belonging to the same base station as the base station registered by the communication terminal 10 are registered based on “area determination” described later. An SMS (incoming call notification) is transmitted to 30.

The example shown in FIG. 6 shows an arrangement in the case where one cell (shown by hatching in the drawing) is a cell corresponding to a base station having the same group ID. The communication terminal 10 and the communication terminal 20 exist in one cell, the communication terminal 30 exists in another cell in which the position of a different group is separated, and another cell in which the position of a different group is further separated The communication terminal 40 exists in the inside. It is assumed that the communication terminal 10 and the communication terminal 20 have performed location registration in a registration message (Registration Massage) in the base station in the cell in which these communication terminals exist, and the communication terminal 10 is out of service area, and other communication terminals. It is assumed that (communication terminal 20, communication terminal 30, and communication terminal 40) are within a range.
In this arrangement, when an out-of-service communication terminal 10 receives an incoming call, the communication terminal 20 belongs to the same base station as the base station registered by the communication terminal 10 based on “area determination” described later. SMS (incoming call notification) is transmitted.

  Next, in the network configuration of the first embodiment of the mobile communication system of the present invention shown in FIG. 1, when voice transmission is performed from the communication terminal 160 to the communication terminal 180, it is the same because the transmission communication terminal 180 is out of range. A series of operations for transmitting “SMS of incoming notification to communication terminal 160” to communication terminals 100 in the area belonging to the base station will be described.

[Group Registration]
First, a plurality of communication terminals that are frequently encountered are registered as a group. For example, when the communication terminal 160 creates a group (communication terminal 100, communication terminal 160, communication terminal 180) as a representative, the communication terminal 160 connects to the SMS center server 220 in step S101 of the flowchart of FIG. In the next step 102, group registration for registering telephone number information (telephone number information) in the SMS center server 220 via HTTP using CDMA2000 1x EV-DO communication, which is wide-area communication, using a browser or the like. I do. The screen display of the communication terminal 160 when performing this group registration is illustrated in FIG. Instead of the telephone number information by group registration, telephone number information registered by a pair function or the like for registering frequently used telephone numbers as shortcuts may be used.

[Incoming call operation 1]
In the operation sequence diagram of FIG. 9, when voice communication is performed from the communication terminal 160 to the communication terminal 180, the MSC 210 that is notified of the voice transmission performs voice reception to the communication terminal 180. At this time, since the communication terminal 180 is in the basement of the building and is out of the service area, the incoming voice call fails. The MSC 210 that has been notified of the voice call failure transmits an incoming call notification indicating that there is a voice call to the SMS center server 220.
The SMS center server 220 receives the incoming notification in step S111 of the flowchart of FIG. 10 and stores the incoming notification in the SMS database 431 in the next step S112. In the next step S113, the telephone number information of the destination of the incoming call notification is confirmed, and it is investigated whether or not a communication terminal belonging to the same group as the communication terminal 180 exists in the same area.

  In the investigation in step S113, when the SMS center server 220 finds the communication terminal 100, which is a communication terminal belonging to the same group as the communication terminal 180, in the same area, the SMS center server 220 proceeds to step S114 and performs SMS (incoming notification). If no communication terminal belonging to the same group as the communication terminal 180 is found in the same area, the SMS (incoming notification) is deleted from the SMS database 361.

  The communication terminal 100 to which the SMS (incoming notification) is transmitted receives the SMS (incoming notification) in step S121 of the flowchart of FIG. At that time, after storing the SMS (incoming notification) in the SMS database 361 of the storage unit 360 of the communication terminal 100, “SMS ACK” is returned to the SMS center server 220. In the next step S122, the telephone number information of the destination of SMS (incoming notification) is checked to check whether the destination is addressed to itself or a communication terminal of the same group. In this investigation, if the SMS (incoming notification) is not addressed to itself but addressed to the same group of communication terminals, the process proceeds from No in step S122 to step S123 to determine whether the address is addressed to the communication terminal of the same group. If the SMS (incoming notification) is addressed to itself, the process proceeds from Yes in step S122 to step S124, and normal SMS reception is performed. If it is determined in step S123 that the destination is addressed to a communication terminal in the same group, the process proceeds to step S125, and the SMS database 361 for storing the SMS addressed to itself is stored in the SMS temporary database 362 provided separately. To do. Note that if the destination is not addressed to the communication terminal of the same group in the investigation in step S123, the process ends as it is addressed to the communication terminal of another group.

Thereafter, when the communication terminal 100 goes out of service area, as shown in FIG. 9, the communication terminal 100 performs a WLAN ad hoc search in order to search for a destination communication terminal of the SMS (incoming call notification) at a constant cycle.
Specifically, when it is detected in step S131 in the flowchart of FIG. 12 that the communication terminal 100 is out of service area, the process proceeds to step S132 to search for the communication terminal that is the destination of the SMS (incoming notification). A WLAN ad hoc search is performed, and if the communication terminal 100 is in the service area, the process ends. If the communication terminal 180 that is the SMS (incoming notification) destination communication terminal is found by this WLAN ad hoc search, the process proceeds from Yes in step S133 to step S134, and the SMS (incoming notification) destination communication terminal If the communication terminal of the SMS (incoming call notification) is not found, the process ends.

  In the next step S135, it is determined whether or not the valid time (for example, 3 hours) set in the SMS (incoming notification) received by the communication terminal 100 has elapsed (timed out). If it is No (within the valid time), the process proceeds to step S136. In step S136, it is determined whether SMS (incoming notification) addressed to the same telephone number as the telephone number information obtained by the exchange is stored in the SMS temporary database 362. If stored, the process proceeds to step S137 and is stored. If not, the process ends. In step S137, an SMS (incoming notification) is transmitted to the communication terminal 180 via WLAN ad hoc communication. In the next step S138, the SMS (incoming notification) is deleted from the SMS temporary database 362 in the storage unit 360 of the communication terminal 100.

The communication terminal 180 that has received the SMS (incoming notification) in step S137 receives the SMS (incoming notification) addressed to itself in step S141 in the flowchart of FIG. 13, and then receives the received SMS (incoming call) in the next step S142. Notification) is duplicated with the SMS (incoming notification) stored in the SMS database 361 of the storage unit 360 of the own communication terminal, and if it is duplicated, the process proceeds to step S143 and the SMS (incoming notification) is determined. If there is no duplication, the process proceeds to step S144, and the incoming call history is displayed based on the SMS (incoming call notification). It should be noted that whether or not SMS (incoming call notification) is duplicated is determined based on time information (time stamp) and communication terminal identification information in the SMS.
Whether or not the communication terminal 180 is out of service when the communication terminal 180 that is the destination communication terminal of the SMS (incoming notification) receives the SMS (incoming notification) via the communication terminal 100 that is a communication terminal belonging to the same group. You may not know. Therefore, a “message prompting the movement of the communication terminal to a place with a good radio wave condition” as illustrated in FIG. 14 may be displayed on the screen.

As shown in step S151 of the operation sequence diagram of FIG. 9 and the flowchart of FIG. 15, when the communication terminal 180 that has received the SMS (incoming notification) moves to the ground and returns to the service area, the MSC 210 detects the service area return. An SMS transmission instruction is sent to the SMS center server 220.
The SMS center server 220 that has received the SMS transmission instruction retrieves the SMS (incoming notification) stored in the SMS database 431 in step S152 of FIG. 15, and then sends the SMS (incoming call) to the communication terminal 180 in step S153. Notification). The communication terminal 180 that has received the SMS (incoming notification) ignores the SMS (incoming notification) because it overlaps with the SMS (incoming notification) stored in the SMS database 361, and the SMS center server 220 receives “ Send SMS ACK ". When receiving the “SMS ACK” in step S154, the SMS center server 220 deletes the SMS (incoming notification) from the SMS database 431 in step S156. If the “SMS ACK” cannot be received in step S154, the loop of No in step S154—No in step S156—No in step S153—No in step S154—No in step S156 is repeated N times. If “SMS ACK” cannot be received, the process ends.

Next, the operation of the “incoming call notification operation 1” of the present invention will be described with reference to FIG. 1, FIG. 16, and FIG.
In the present invention, a group is created in advance by a plurality of communication terminals (in the first embodiment, the communication terminal 100, the communication terminal 160, and the communication terminal 180) and registered in the SMS center server 220 on the carrier network 240 side.
In a state where the group registration is completed, as shown in FIG. 16, when an incoming call is made to the communication terminal 180 outside the service area of the BS 200 belonging to the group, the communication is a communication terminal belonging to the same group other than the communication terminal 180. Since the terminal 100 is in the vicinity and within range, the SMS center server 220 transmits an SMS (incoming notification) to the communication terminal 100.
The communication terminal 100 that has received the SMS (incoming notification) temporarily stores the SMS (incoming notification) in the SMS temporary database 362 of its own storage unit 360 and moves out of the range of the BS 200 as shown in FIG. When a communication ad-hoc search is performed in order to investigate whether or not there is a communication terminal 180 that is the destination communication terminal of the SMS (incoming notification) in the vicinity of the user, As shown in FIG. 1, by sending (transferring) the stored SMS (incoming notification) to the communication terminal 180 by WLAN ad hoc communication, the incoming notification to the out-of-service communication terminal 180 is made as much as possible. Communicate in real time.

  According to the “incoming call notification operation 1” of the present invention, the SMS (incoming call) is sent from the SMS center server 220 that has received the incoming call information SMS (incoming call notification) to the out-of-service communication terminal 180 via the communication terminal 100 belonging to the same group. By transmitting (transferring) notification), it is possible to transmit incoming information to the communication terminal 180 that is out of service area in real time as much as possible. Accordingly, since it is possible to obtain an incoming call notification without using wide area communication (carrier communication infrastructure) in a communication terminal that is out of service area, the frequency at which the user of the communication terminal returns to the service area is reduced. Further, even when the user of the communication terminal 180 is not aware that the user is out of service area, if there is an incoming call notification via WLAN ad hoc communication, a “communication terminal to a place with a good radio wave condition” as shown in FIG. It is expected that usability will be improved by displaying a message that prompts the user to move.

[Incoming call operation 2]
In the mobile communication system of FIG. 1, the communication terminal 160 returns to the communication terminal 100 from the communication terminal 160 in the operation sequence diagram of FIG. When a voice call is made to 180, MSC 210 notified of the voice call executes a voice call to communication terminal 180. At this time, since the communication terminal 180 is in the basement of the building and is out of the service area, the incoming voice call fails. The MSC 210 that has been notified of the voice call failure transmits an incoming call notification indicating that there is a voice call to the SMS center server 220.
The SMS center server 220 receives the incoming notification in step S111 of the flowchart of FIG. 10 and stores the incoming notification in the SMS database 431 in the next step S112. In the next step S113, the telephone number information of the destination of the incoming call notification is confirmed, and it is investigated whether or not a communication terminal belonging to the same group as the communication terminal 180 exists in the same area.

  In the investigation in step S113, when the SMS center server 220 finds the communication terminal 100, which is a communication terminal belonging to the same group as the communication terminal 180, in the same area, the SMS center server 220 proceeds to step S114 and performs SMS (incoming notification). If no communication terminal belonging to the same group as the communication terminal 180 is found in the same area, the SMS (incoming notification) is deleted from the SMS database 361.

  The communication terminal 100 to which the SMS (incoming notification) is transmitted receives the SMS (incoming notification) in step S121 of the flowchart of FIG. At that time, after storing the SMS (incoming notification) in the SMS database 361 of the storage unit 360 of the communication terminal 100, “SMS ACK” is returned to the SMS center server 220. In the next step S122, the telephone number information of the destination of SMS (incoming notification) is checked to check whether the destination is addressed to itself or a communication terminal of the same group. In this investigation, if the SMS (incoming notification) is not addressed to itself but addressed to the same group of communication terminals, the process proceeds from No in step S122 to step S123 to determine whether the address is addressed to the communication terminal of the same group. If the SMS (incoming notification) is addressed to itself, the process proceeds from Yes in step S122 to step S124, and normal SMS reception is performed. If it is determined in step S123 that the destination is addressed to a communication terminal in the same group, the process proceeds to step S125, and the SMS database 361 for storing the SMS addressed to itself is stored in the SMS temporary database 362 provided separately. To do. Note that if the destination is not addressed to the communication terminal of the same group in the investigation in step S123, the process ends as it is addressed to the communication terminal of another group.

Thereafter, when communication terminal 180 moves to the ground and returns to the service area, MSC 210 detects the return to the service area and sends an SMS transmission instruction to SMS center server 220.
The SMS center server 220 that has received the SMS transmission instruction retrieves the SMS (incoming notification) stored in the SMS database 431 in step S152 of FIG. 15, and then sends the SMS (incoming call) to the communication terminal 180 in step S153. Notification). The communication terminal 180 that has received the SMS (incoming notification) displays in the incoming call history that there has been an incoming call based on the SMS (incoming notification).

  On the other hand, since the communication terminal 100 storing the SMS (incoming notification) addressed to the communication terminal 180 does not have “a technique for knowing that the communication terminal 180 has returned to the service area”, the communication terminal 100 is moved out of the service area and out of service area. As a trigger, as shown in steps S131 to S132 of FIGS. 18 and 12, a WLAN ad hoc search is performed in order to search for a destination communication terminal of the SMS (incoming notification). If the communication terminal 180 that is the SMS (incoming notification) destination communication terminal is found by this WLAN ad hoc search, the process proceeds from Yes in step S133 to step S134, and the SMS (incoming notification) destination communication terminal If the communication terminal of the SMS (incoming call notification) is not found, the process ends.

  In the next step S135, it is determined whether or not the valid time (for example, 3 hours) set in the SMS (incoming notification) received by the communication terminal 100 has elapsed (timed out). If it is No (within the valid time), the process proceeds to step S136. In step S136, it is determined whether SMS (incoming notification) addressed to the same telephone number as the telephone number information obtained by the exchange is stored in the SMS temporary database 362. If stored, the process proceeds to step S137 and is stored. If not, the process ends. In step S137, an SMS (incoming notification) is transmitted to the communication terminal 180 via WLAN ad hoc communication. In the next step S138, the SMS (incoming notification) is deleted from the SMS temporary database 362 in the storage unit 360 of the communication terminal 100.

  The communication terminal 180 that has received the SMS (incoming notification) in step S137 receives the SMS (incoming notification) addressed to itself in step S141 in the flowchart of FIG. 13, and then receives the received SMS (incoming call) in the next step S142. Notification) is duplicated with the SMS (incoming notification) stored in the SMS database 361 of the storage unit 360 of the own communication terminal. Since it is duplicated, the process proceeds to step S143 and the SMS (incoming notification) is determined. Is ignored. It should be noted that whether or not SMS (incoming call notification) is duplicated is determined based on time information (time stamp) and communication terminal identification information in the SMS.

  According to the “incoming call notification operation 2” of the present invention, the SMS (incoming call) is sent from the SMS center server 220 that has received the incoming call information SMS (incoming call notification) to the out-of-service communication terminal 180 via the communication terminal 100 belonging to the same group. By transmitting (transferring) notification), it is possible to transmit incoming information to the communication terminal 180 that is out of service area in real time as much as possible. Accordingly, since it is possible to obtain an incoming call notification without using wide area communication (carrier communication infrastructure) in a communication terminal that is out of service area, the frequency at which the user of the communication terminal returns to the service area is reduced. Further, even when the user of the communication terminal 180 is not aware that the user is out of service area, if there is an incoming call notification via WLAN ad hoc communication, a “communication terminal to a place with a good radio wave condition” as shown in FIG. It is expected that usability will be improved by displaying a message that prompts the user to move.

[Incoming call notification operation 3]
In the mobile communication system of FIG. 1, the communication terminal 160 to the communication terminal 180 in the operation sequence diagram of FIG. 18 showing a state where the SMS (incoming notification) addressed to the communication terminal 180 cannot be received by other communication terminals in the same group. When the voice call is made, the MSC 210 that is notified of the voice call executes a voice call to the communication terminal 180. At this time, since the communication terminal 180 is in the basement of the building and is out of the service area, the incoming voice call fails. The MSC 210 that has been notified of the voice call failure transmits an incoming call notification indicating that there is a voice call to the SMS center server 220.
The SMS center server 220 receives the incoming notification in step S111 of the flowchart of FIG. 10 and stores the incoming notification in the SMS database 431 in the next step S112. In the next step S113, the telephone number information of the destination of the incoming call notification is confirmed, and it is investigated whether or not a communication terminal belonging to the same group as the communication terminal 180 exists in the same area. At this time, if a communication terminal belonging to the same group that can receive SMS other than the communication terminal 180 that is the destination communication terminal is not found in the area, the communication terminal is searched at regular intervals. When a communication terminal belonging to the same group that can receive SMS is found in the area by this search, and when the communication terminal 180 returns to the service area, the subsequent operation is the same as the incoming call notification operation 1, and the description is omitted. To do.

  According to the “incoming call notification operation 3” of the present invention, the SMS (incoming call) is sent from the SMS center server 220 that has received the incoming call information SMS (incoming call notification) to the out-of-service communication terminal 180 via the communication terminal 100 belonging to the same group. By transmitting (transferring) notification), it is possible to transmit incoming information to the communication terminal 180 that is out of service area in real time as much as possible. Accordingly, since it is possible to obtain an incoming call notification without using wide area communication (carrier communication infrastructure) in a communication terminal that is out of service area, the frequency at which the user of the communication terminal returns to the service area is reduced. Further, even when the user of the communication terminal 180 is not aware that the user is out of service area, if there is an incoming call notification via WLAN ad hoc communication, a “communication terminal to a place with a good radio wave condition” as shown in FIG. It is expected that usability will be improved by displaying a message that prompts the user to move.

1 is a block diagram illustrating a network configuration of a mobile communication system according to a first embodiment of this invention. It is a block diagram which illustrates the composition of the communication terminal in the mobile communication system of a 1st embodiment. It is a block diagram which illustrates the composition of the SMS center server in the mobile communication system of a 1st embodiment. It is a figure which shows notionally arrangement | positioning of the base station applicable to the mobile communication system of this invention, a cell, and a communication terminal. It is a figure which shows notionally arrangement | positioning of the base station applicable to the mobile communication system of this invention, a cell, and a communication terminal. It is a figure which shows notionally arrangement | positioning of the base station applicable to the mobile communication system of this invention, a cell, and a communication terminal. It is a flowchart which shows the group registration which a communication terminal implements in the mobile communication system of 1st Embodiment. It is a figure which illustrates the screen display of the communication terminal at the time of performing group registration in the mobile communication system of 1st Embodiment. It is an operation | movement sequence diagram which shows the incoming call notification operation | movement 1 in the mobile communication system of 1st Embodiment. It is a flowchart which shows the transmission / reception process of the incoming call notification by the SMS center server in the mobile communication system of 1st Embodiment. It is a flowchart which shows the reception process of the incoming notification addressed to the other communication terminal by the communication terminal in the mobile communication system of 1st Embodiment. It is a flowchart which shows the transmission process of the incoming notification addressed to the other communication terminal by the communication terminal in the mobile communication system of 1st Embodiment. It is a flowchart which shows the reception process of the incoming call notification addressed to the self-communication terminal by the communication terminal in the mobile communication system of 1st Embodiment. It is a figure which illustrates "the message which urges the movement of a communication terminal to a place with a good radio wave state" displayed on a screen in a communication terminal outside a service area in the mobile communication system of a 1st embodiment. It is a flowchart which shows the transmission process of the incoming call notification with respect to the communication terminal which returned in the area by the SMS center server in the mobile communication system of 1st Embodiment. It is a figure for demonstrating an effect | action of the incoming call notification operation | movement 1 of this invention. It is a figure for demonstrating an effect | action of the incoming call notification operation | movement 1 of this invention. It is an operation | movement sequence diagram which shows the incoming call notification operation | movement 2 in the mobile communication system of 1st Embodiment. It is an operation | movement sequence diagram which shows the incoming call notification operation | movement 3 in the mobile communication system of 1st Embodiment. It is a figure for demonstrating the notification operation | movement of the incoming call to the communication terminal out of service area in a mobile communication system. It is a figure for demonstrating the notification operation | movement of the incoming call to the communication terminal out of service area in a mobile communication system. It is an operation | movement sequence diagram for demonstrating the incoming call notification operation | movement to the communication terminal in a mobile communication system out of service area.

Explanation of symbols

100 communication terminal (incoming destination communication terminal)
160 Communication terminal (transmission side communication terminal)
180 communication terminal (communication terminal belonging to the same group as the destination communication terminal)
190,200 Base Station (BS)
210 Call Control Server (MSC)
220 SMS center server 230 Location server (LS)
240 Carrier network 300, 330 Antenna 310 WLAN signal processing unit 320 WLAN protocol processing unit 340 EV-DO signal processing unit 350 EV-DO protocol processing unit 360 Storage unit 361 SMS database (DB)
362 SMS temporary database (DB)
363 Group Phone Number Database (DB)
370 Control unit 371 SMS control unit 372 Group control unit 373 Out-of-service determination unit 374 SMS duplication detection unit 375 SMS destination determination unit 376 SMS transfer processing unit 377 SMS processing unit 378 Phone number registration processing unit 379 Phone number exchange processing unit 380 Phone number determination Processing unit 400 Ethernet (registered trademark) signal processing unit 410 Ethernet (registered trademark) protocol processing unit 420 Control unit 430 Storage unit 431 SMS database (DB)
432 Group Phone Number Database (DB)
440 Area control unit 441 Area determination processing unit 442 Area information processing unit 450 SMS control unit 451 SMS processing unit 452 SMS transmission unit 453 SMS reception unit 460 Group control unit 461 Telephone number registration processing unit 462 Telephone number determination processing unit

Claims (6)

An ad hoc communication unit for performing ad hoc communication;
A wide area communication unit that communicates via a base station;
A storage unit for storing various information;
When the incoming information received from the base station in the wide area communication unit is incoming information addressed to another communication terminal, the incoming information is stored in the storage unit, and communication by the wide area communication unit becomes impossible In this case, it is determined whether incoming information addressed to the other communication terminal is stored in the storage unit. If incoming information addressed to the other communication terminal is stored in the storage unit, the ad hoc communication is performed. And a control unit that controls the unit to perform a search for the other communication terminal.   When the other communication terminal is found by the search, incoming information addressed to the other communication terminal stored in the storage unit is transmitted to the other communication terminal via the ad hoc communication unit. Item 2. The communication terminal according to Item 1.   When the other communication terminal is found by the search, the identification information of the other communication terminal is acquired via the ad hoc communication unit, and the acquired identification information and the other communication terminal stored in the storage unit are addressed. If the identification information included in the incoming information matches, the incoming information addressed to the other communication terminal stored in the storage unit is transmitted to the other communication terminal via the ad hoc communication unit. The communication terminal according to claim 2. An ad hoc communication unit for performing ad hoc communication;
A wide area communication unit that communicates via a base station;
A storage unit for storing incoming information;
When incoming information is received from another communication terminal via the ad hoc communication unit, if the same incoming information as the received incoming information is not stored in the storage unit, the incoming information An incoming call notification unit for performing incoming call notification based on the communication terminal.   When the ad-hoc communication unit receives incoming information from another communication terminal via the ad-hoc communication unit, if the same incoming information as the received incoming information is stored in the storage unit, The communication terminal according to claim 4, wherein an incoming call notification based on incoming call information is not performed. A storage unit that stores identification information of a plurality of communication terminals as a group;
A receiving unit for receiving incoming call information due to an incoming call failure for a predetermined communication terminal from a call control server;
When the incoming information is received from the call control server, it is determined whether or not the identification information of the destination communication terminal of the incoming information is stored in the storage unit, and the identification information of the destination communication terminal of the incoming information is stored in the storage unit. A control unit that, when stored, controls to transmit the incoming information to communication terminals corresponding to other identification information constituting a group to which the identification information of the destination communication terminal of the incoming information belongs. The server characterized by comprising.

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