JP2007174326A - Communication system and radio portable terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To automatically update a registration-management telephone directory in an in-plant radio telephone network, and to distribute the telephone directory at a registered user terminal. <P>SOLUTION: Portable terminals 10 decide a communicable base station by positional information, transmitted by a radio base station 20. When the portable terminals 10 can communicate with the radio base station 20, users with the portable terminals 10 register the information of the portable terminals 10 to a database. The radio base station 20 deletes the telephone directories in the portable terminals 10 via a radio public network 50 after a fixed time passes, after the portable terminals 10 have been placed outside the communication area of the radio base station 20, and the registrations of the portable terminals 10 are deleted from the database. The radio base station 20 broadcasts differential telephone-directory information to each portable terminal 10, registered in the database in a server 40, with a fixed periodicity. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a communication system and a wireless portable terminal, and more particularly to a communication system or a wireless portable terminal that updates telephone number information of a communication destination recorded in the wireless portable terminal.

  In recent years, Mobile Centrex, which enables mobile terminals to be used as extension telephones, has been attracting attention as a means of communication that replaces wired extension telephones in offices. In this service, the extension telephone exchange function is transferred from the PBX to the mobile phone service provider. This eliminates the need for wiring work associated with changing the office layout, etc. in Mobile Centrex. Mobile Centrex can be used to make calls even when the other party is away.

  Mobile Centrex will have base stations that cover the entire office as a communication area. Users of this service receive distribution of mobile phones (mobile terminals). When a user calls an extension number in the office using a mobile terminal, the extension number and the public number (mobile phone number) are converted in the conversion table of the database in the server connected to the base station, and the public number This is a mechanism for making a call to a communication partner. In addition, the mobile terminal can make a call with an extension number only in the office, and functions as a normal mobile terminal outside the area of the base station in the office.

  A cellular phone used as an extension telephone by a user has a telephone directory function for managing telephone numbers and mail addresses. The user can make a call quickly by editing the phone book by himself and referring to the phone book.

  In Patent Document 1, the telephone number is managed by a telephone directory server, and the telephone number information of the mobile phone whose number has been changed is automatically registered to the terminal registered in a specific group. The invention to update is described.

  In addition, as a technology for knowing which mobile phone base station area the user's terminal is in, the base station transmits a zone signal in the area, the terminal periodically confirms reception, and based on the received zone signal, There is known a technique for determining whether or not a station is in the area of the station and notifying the base station when entering a different zone from the previous zone.

JP-A-2005-79845

  One of the features of a system that uses a mobile phone as an extension telephone is that users frequently enter and leave, and the telephone number frequently changes. In addition, when a user enters or exits, a plurality of users often move together at one time, and the period tends to concentrate on a specific period such as the end of the period or the beginning of the period. In addition, as compared with a mobile phone directory that is managed privately by an individual, a mobile phone for extension telephones has a large volume of phone book information and is shared by users. Furthermore, it is necessary to manage the telephone number information stored in the database with a high security system so that it does not leak out of the office.

  There are the following problems in the use environment of the above-described office mobile phone. The user manually inputs a large number of extension telephone numbers and user information related to work into the memory in the terminal, and each user is engaged in a lot of work. There is a possibility of erroneous input for manual input. In addition, when there is a change in the extension telephone registration information, the user's terminal is not notified, and there are many cases in which a call is made with an extension telephone number that has not been updated and a false call is made. The same applies to the management of registered users on the database, which requires a lot of human work.

  The technology for automatically updating the phone book of the terminals in the group described in Patent Document 1 can eliminate the input work by the user and the database administrator, and can keep the phone number information of the terminals up to date. However, every time a change occurs in the telephone number information registered in the database, the change is made for each registered user. Therefore, in the office mobile extension telephone environment shown above, many data changes are made in the same area at a specific time. As a result, excessive radio traffic is generated.

  Further, in the management of telephone number information by individual users, there is no method for preventing leakage of call destination information recorded on the terminal when the user loses the terminal. Therefore, there are concerns about security vulnerability.

  The present invention has been made in view of the circumstances as described above, and its purpose is to reduce the work manually input by the user and the database administrator, reduce the wireless traffic in the office, and risk of information leakage. An object of the present invention is to provide a low-security communication system and a wireless portable terminal.

  The above problem comprises a mobile terminal, a radio base station that communicates with the mobile terminal, and a center station that is connected to the radio base station via an IP network and manages mobile terminal information under the control of the radio base station. Can be achieved by a communication system that transmits mobile terminal information to the mobile terminal when the mobile terminal information under the control of the radio base station is updated.

  A mobile terminal including at least a memory in which a telephone number of a communication partner is recorded, a radio base station under the control of the mobile terminal, and a mobile terminal connected to the radio base station through an IP network and under the control of the radio base station The center station manages information, and when the center station detects that the mobile terminal is out of control of the radio base station, a part or all of the memory is addressed to the mobile terminal after a predetermined time. This can be achieved by a communication system that transmits an erasure request.

  Further, a radio termination unit that performs RF signal processing, D / A conversion, A / D conversion, and modulation / demodulation processing, a control unit that is connected to the radio termination unit and controls communication, and is connected to the control unit, This can be achieved by a wireless portable terminal that includes at least a memory in which a telephone number of a communication partner is recorded, and erases a part or all of the memory when a memory erasure signal is received from a radio base station.

  According to the present invention, it is possible to automatically update / delete the phone book of the mobile terminal.

  Hereinafter, embodiments of the present invention will be described using examples with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of a communication system. In FIG. 1, a communication system 100 includes a mobile terminal 10 such as a mobile phone, a radio base station 20 that performs voice and data communication wirelessly with the mobile terminal 10, a center station 30 that performs call control and user authentication, a mobile terminal, A server 40 having a database consisting of telephone number information of a local extension telephone, user information, a wireless public network 50 which is a general telephone line, an IP network 60 which is a path of packet data between the server 40 and the wireless base station 20, It is composed of a fixed extension 80 that is a wired extension telephone in the office and a PBX 70 that is a voice exchange. When the mobile terminal 10 communicates with the outside, the route is different between voice call and data communication. That is, in voice communication, connection is made through the route of the mobile terminal 10, the wireless base station 20, the center station 30, and the wireless public network 50, whereas in data communication, connection is made through the route of the mobile terminal 10, the wireless base station 20, and the IP network 60. To do. As a matter of course, the PBX 70 and the fixed extension 80 are not necessary in an environment having only a local wireless extension network.

  FIG. 2 is a block diagram illustrating the hardware configuration of the server. In FIG. 2, the server 40 includes a CPU 42 connected to a bus 41, a memory 43, an external storage device 44, and a network interface 45.

  FIG. 3 is a diagram illustrating a database stored in the external storage device. The external storage device 44 of the server 40 has a database composed of an information list 46 relating to a private telephone and a wireless portable terminal information list 47. The private telephone information list 46 is composed of extension numbers and user information related to the fixed extension 80 connected to the PBX 70. The wireless portable terminal information list 47 includes telephone number information and user information of portable terminals used as extension telephones on the premises. When transmitting the database from the base station to the mobile terminal, the mobile terminal registered in the wireless mobile terminal information list 47 becomes the transmission destination. In the case of a system configuration in which the PBX 70 and the fixed extension 80 are not connected, the local telephone information list 46 is not necessary.

  FIG. 4 is a block diagram illustrating the internal configuration of the mobile terminal. In FIG. 4, a mobile terminal 10 includes a radio termination unit 11 that performs RF signal processing, D / A, A / D conversion, and modulation / demodulation processing, a control unit 12 that controls voice communication and data communication, a telephone number of a call destination, It comprises a memory 13 for recording user information. The inside of the memory 13 is divided into two areas: an information list 14 for private telephones and wireless portable terminals and a personal use telephone directory 15. The local telephone and wireless mobile terminal information list 14 is an area for periodically downloading data from the base station. On the other hand, the personal use telephone directory 15 is an area for the user to record telephone number information such as a customer's telephone number that is different from the private telephone. Since the private phone and wireless portable terminal information list 14 and the personal use phone book 15 are divided into different areas, data is not downloaded to the personal use phone book 15 and overwritten.

  FIG. 5 is a flowchart for explaining database update processing and differential telephone directory information transmission processing of the center station. The center station 30 updates the databases 46 and 47 each time a new registration or deregistration is received from the user (S1). Next, the center station 30 determines whether or not a specified time (24 hours in this case) has elapsed since the previous differential telephone directory information transmission processing start time (S2). If the determination in step 2 is No, the process returns to step 1. If the determination in step 2 is Yes, the difference telephone book data from the previous update is broadcasted to the mobile terminal 10 in the area of the radio base station 20. The newly registered mobile terminal will be described later.

  FIG. 6 is a diagram illustrating a new registration sequence of a mobile terminal among the mobile terminal, the radio base station, and the center station. In FIG. 6, when a new user turns on the mobile terminal 10 (S5), the wireless base station 20 receives zone information transmitted at regular intervals (about 5 seconds) (S6). The portable terminal 10 recognizes that it has received a zone signal different from the zone signal that has been received, and transmits telephone number information to the center station 30 (S7). The center station 30 that has received the telephone number information searches the database using the received telephone number information as a key (S8), and transmits the search result to the portable terminal (S9). In this case, since there is no corresponding person in the database, it is a search result that requires input of user information. The portable terminal 10 accepts user information input by the user (S10) and transmits it to the center station 30 (S10). The center station 30 associates the previously received telephone number information with the user information and registers them in the database (S12), and notifies the mobile terminal 10 that the registration has been completed (S13). The registration processing to the database is completed by the processing so far, and then the phone book data update processing of the mobile terminal 10 is performed.

  Receiving the registration completion notification from the base station, the mobile terminal 10 initializes the extension telephone area 14 of the memory 13 (S14), and notifies the center station 30 that the initialization of the memory is completed (S15). Receiving the memory initialization completion notification, the center station 30 transmits the phone book data by the unicast method (S16). The mobile terminal 10 that has received the phone book data writes the phone book data into the extension telephone area 14 (S17), completes the phone book update operation, and starts up.

  This update is not immediately reflected on other users registered in the database, but phonebook data is sent to newly registered users immediately after the update using the unicast method. It will be ready for use.

  In addition, it is almost the same when the registered user's terminal is changed to another user. The user sends a registrant change notification from the mobile terminal to the base station, and after updating the database on the server, the phone book data is updated. Sent to the mobile terminal that changed the registrant.

  FIG. 7 is a diagram for explaining a mobile terminal registration deletion sequence among the mobile terminal, the wireless public network base station, and the center station. In FIG. 7, a case where the mobile terminal 10 registered in the database moves out of the area of the radio base station 20 and enters the area of the radio public network base station 51 will be described. The mobile terminal 10 receives the zone information transmitted from the wireless public network base station 51 (S18), recognizes that it has received zone information different from the zone information received so far, and transmits the telephone number information to the wireless public network. Transmit to the base station 51. The wireless public network base station 51 that has received the telephone number information of the portable terminal transfers the received telephone number information to the center station 30 (S19). As described above, a wireless public network base station intervenes in communication between the mobile terminal 10 and the center station 30. However, for simplicity of illustration, it is indicated by a single arrow in FIG. The same applies to other steps.

  The center station 30 that has received the telephone number information searches the database in the server (S20), and since it is registered in the database in this case, it is determined that the mobile terminal 10 having the notified telephone number information has moved out of the area. Then, the timer operation is started (S21). In this case, the center station 30 did not return to the area even after the specified time (240 hours), and therefore the center station 30 transmits a memory erasure signal to the mobile terminal 10 via the wireless public network base station 51 (S23). ). The mobile terminal 10 outside the area that has received the memory erasure signal erases the extension telephone area 14 of the memory 13 (S24), and sends an erasure completion notice to the center station 30 via the wireless public network base station 51 (S25). . The center station 30 that has received the erasure completion notification deletes the telephone number information and user information of the mobile terminal 10 from the database (S26). Thus, the registration deletion process is completed.

  If the mobile terminal 10 that has moved out of the area returns to the area within the specified time, the center station 30 stops the timer. Further, by using together the auto power-off of the portable terminal (power is turned off at a fixed time every day) and the power-on lock number, it is possible to eliminate leakage of extension telephone information.

  According to the above-described embodiment, it is possible to automatically update the in-server phone book database and the phone book of the mobile terminal registered in the database in the local mobile phone network. In addition, it is possible to automatically delete the local telephone directory of the portable terminal taken out from the local area.

  In the above-described embodiment, the local mobile phone network has been described. However, it is possible to cope with the deletion of the phone book of the lost mobile phone. In this case, the personal use telephone directory 15 of the mobile terminal 10 may be deleted. Similarly, mail records can be deleted.

It is a block diagram which shows the structure of a communication system. It is a block diagram explaining the hardware constitutions of a server. It is a figure explaining the database memorize | stored in an external storage device. It is a block diagram explaining the internal structure of a portable terminal. It is a flowchart explaining the database update process of a center station, and a difference telephone directory information transmission process. It is a figure explaining the sequence of the new registration of the portable terminal between a portable terminal, a wireless base station, and a center station. It is a figure explaining the registration deletion sequence of a portable terminal between a portable terminal, a wireless public network base station, and a center station.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Portable terminal, 11 ... Wireless termination part, 12 ... Control part, 13 ... Memory part, 14 ... Information list of private telephone and wireless portable terminal, 15 ... Personal use telephone directory, 20 ... Wireless base station, 30 ... Center station 40 ... Server, 41 ... Bus, 42 ... CPU, 43 ... Memory, 44 ... External storage, 45 ... Network interface, 46 ... Private telephone information list, 47 ... Wireless portable terminal information list, 50 ... Wireless public network, 51 ... wireless public network base station, 60 ... IP network, 70 ... PBX, 80 ... fixed extension telephone, 100 ... communication system.

Claims (3)

In a communication system comprising a mobile terminal, a radio base station that communicates with the mobile terminal, and a center station that is connected to the radio base station via an IP network and manages mobile terminal information under the radio base station,
The center station transmits mobile terminal information to the mobile terminal when the mobile terminal information under the control of the radio base station is updated. A mobile terminal including a memory in which at least the telephone number of the communication partner is recorded, a radio base station under the control of the mobile terminal, and mobile terminal information under the control of the radio base station connected to the radio base station via an IP network In a communication system consisting of a center station that manages
When the center station detects that the mobile terminal is out of control of the radio base station, the center station transmits a part or all of the memory erasure request to the mobile terminal after a predetermined time. A communication system characterized by the above. A radio termination unit that performs RF signal processing, D / A conversion, A / D conversion, and modulation / demodulation processing; a control unit that is connected to the radio termination unit and that controls communication; and that is connected to the control unit and communicates at least In a wireless portable terminal consisting of a memory in which the other party's phone number is recorded,
A wireless portable terminal, wherein when a memory erasure signal is received from a radio base station, a part or all of the memory is erased.

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