Abstract:
A text messaging device including a transmitter having different transmission modes for transmitting text messages, which are addressed to mobile terminals or to other information, to a server. The text messaging device includes a receiver for receiving from the server text messages from the mobile terminals or from the other information terminals. The text messaging device also includes a detector for detecting and reporting to the server an operational status of the transmitter including a change of status of a connection with communication lines.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This is a continuation of Ser. No. 09/772,000 filed Jan. 30, 2001 now pending, which is a continuation of International Application PCT/JP99/02353 filed Apr. 30, 1999 now pending, the disclosures of which are incorporated herein by reference. This application also claims the benefit of Japanese application No. 10-222655, filed Jun. 8, 1998, whose priority is claimed under 35 U.S.C. §119, the disclosure of which is incorporated herein by reference. 
     
    
     BACKGROUND 
       [0002]    1. Field 
         [0003]    The present invention relates to a text messaging system for sending and receiving text messages among mobile terminals and information terminals connected via a network. More particularly, the present invention relates to a text messaging system for sending and receiving according to sender and receiver status text messages whose immediacy is strong, among multiple mobile terminals and information terminals connected to a computer network such as mobile a communication network or packet exchange network. 
         [0004]    In the present invention, “packet exchange networks” mean networks for connecting personal computers (PC), workstations (WS), and PDAs (personal digital assistants); and the Internet, local area networks (LAN) and intranets can be cited as examples of packet exchange networks. 
         [0005]    Mobile terminals are not particularly limited as long as they can send and receive text information via a mobile communication network, and mobile phones, personal handyphone systems (PHS), car phones, and pocket beepers can be cited as examples of mobile terminals. Information terminals are not particularly limited as long as they can send and receive text information via a network, and PCs, WSs, and PDAs can be cited as examples of information terminals. 
       DESCRIPTION OF THE RELATED ART 
       [0006]      FIG. 21  shows a conceptual structure of a conventional text messaging system using mobile phones, PHSs, and a center for relaying them. 
         [0007]    A mobile terminal A sends wirelessly to a text message center text messages addressed to a mobile terminal B ( 1 ). The center comprehends condition of each mobile terminal with a detection part of radio condition. If the mobile terminal B is receivable, the text message center transmits the text message to the mobile terminal B. If the mobile terminal B is unreceivable because it is out of the radio area, for example, the text message center stores the text message in the storage area ( 2 ). At the moment that the mobile terminal B becomes receivable the text message center transmits the text message ( 3 ,  4 ,  5 ,  6 ,  7 ). A part of the mobile terminals B may connect to the center and obtain the text message stored in the center. Furthermore, text messages may be transmitted from mobile terminal A to mobile terminal B directly, not via the center. In this case, if the destination terminal is out of the radio area or on the phone, text messages are not received. 
         [0008]    In the above-mentioned system in  FIG. 21 , a setting that e-mail is forwarded to a designated address is previously made. By storing in the center e-mail reached the designated address as a text message to a mobile terminal, e-mail is liaised with mobile terminals ( 9 ). There is also a system in which sender, title, and importance level of e-mail are previously set. When e-mail corresponding to forwarding conditions reaches the center, the e-mail is forwarded to a mobile terminal. Conversely, there is a system that when an e-mail address is inputted on the destination in a mobile terminal, the center transmits text messages as e-mail ( 8 ). 
         [0009]    There already exists a system other than those above that an e-mail server detects e-mail arrival and notifies a predetermined mobile terminal of incoming of mail with information such as a sender of the e-mail, the title, and the time. 
         [0010]    Meanwhile, as a means to detect other parties&#39; statuses on a network, a monitor service of link state to the network, a busy condition management service of a service such as chat or electronic conference, an inventory management service, and a service computerized destination board are provided. 
         [0011]    However, in a conventional text messaging system, text messages from mobile terminals are forwarded to e-mail only if such a setting is made. Receive messages cannot be received on a mobile terminal unless the setting once made is canceled. Furthermore, these setting and canceling are very troublesome. Receivers selectively use a send method of text messages such as e-mail and transfer to a mobile terminal regardless of the other party&#39;s status. On this account, selecting or switching a send mode according to the other party&#39;s status, which dynamically changes, is not performed. 
         [0012]    For example, assume that a partner receiving text messages is connected to a network with a PC. In this case, receiving character messages on the PC instead of a mobile terminal is convenient for replying, enabling text messages to be immediately transmitted. Text messages of a mobile terminal are stored if the other party cannot receive them, but the sender cannot know that the messages are not immediately received. Under such circumstances, the sender cannot know if he/she needs to take another means or measure because the other party does not look at the sent text messages. 
         [0013]    Since liaison of text message communication between mobile terminals and PCs are limited, it is difficult to freely transmit text messages to an information terminal currently used by the other party with a network application currently used by the other party. On this account, a user cannot communicate according to the other party&#39;s status and it is inconvenient for the user even if he/she know that the other party is connected to a network or network service in a place away from home. 
         [0014]    Furthermore, an e-mail system can notify the sender a status that a sent e-mail did not reach the other party, for example. However, this system does not manage such dynamically-changing send result as the other party not having check the e-mail for certain time or the other party not having read it while he was using a network service. 
       SUMMARY 
       [0015]    Additional aspects and/or advantages will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the invention. 
         [0016]    The present invention aims at providing technologies for sending and receiving text messages with mobile terminals such as mobile phones and PCs in real time according to the utilization status of dynamically-changing information terminals. 
         [0017]    A first aspect of the present invention provides a text messaging system comprising multiple information terminals having communication means, and a server connected to the above-mentioned information terminals via a communication line suitable to the above-mentioned communication means. The above-mentioned information terminals have send means, receive means, and status detection means. The send means sends to a server a text message addressed to another information terminal. The receive means receives from another information terminal the text message from another information terminal. The status detection means detects operational status including at least link state to the communication line and notifies the server of it. 
         [0018]    The server has receive means, send means, status administration means, and decision means. The receive means receives text messages from information terminals. The send means sends text messages received from information terminals to other information terminals. The status administration means retains operational statuses of information terminals notified from the status detection means for every users. The decision means determines send modes of text messages according to operational statuses of information terminals. 
         [0019]    Mobile communication networks, call switching networks such as PSTN (public switched telephone network), and packet switched networks can be cited as communication lines. A server comprehends operational statuses of information terminals because each information terminal reports operational status such as condition of connection to a communication line to the server. For example, assume that user A sends a text message from a PC on a communication line to another user B via a server. The server determines whether or not the PC of user B is connected to the communication line, and if it is connected, the server sends the text message to the PC of user B. If it is not connected to the communication line, the server transmits the text message to the mobile phone of user B. 
         [0020]    A second aspect of the present invention provides a text messaging system comprising one or more mobile terminals and information terminals respectively having communication means and a server connected to the above-mentioned mobile terminals and mobile information terminals via a communication line according to communication means. 
         [0021]    The information terminals have send means, receive means, and status detection means. The send means sends to the server text messages addressed to other mobile terminals or information terminals. The receive means receives from the server text messages sent from other mobile terminals or information terminals. The status detection means detects operational status including at least link state to the communication line and notifies the server of it. 
         [0022]    The server has receive means, send means, status administration means, and decision means. The receive means receives text messages from information terminals. The send means sends text messages received from mobile terminals or information terminals to other mobile terminals or information terminals. The status administration means retains operational statuses of information terminals notified from the status detection means for every users. The decision means determines send modes of text messages according to operational statuses of information terminals. PCs and WSs notify the server of at least the status of a link to a communication line and the server retains the notified status of the information terminal. When user A sends a text message to other user B via the server, information that user B is identified by is included in the text message to be sent. Specifically, a text message from a mobile terminal includes a telephone number of user B, ID, etc. The status administration means of the server obtains operational status of the user B&#39;s PC based on the information included in the text message. The decision means determines a send mode according to the present status of the PC if text messages can be sent to the user B&#39;s PC. Otherwise the decision means forwards the text message to the mobile terminal of user B. 
         [0023]    A third aspect of the present invention provides a text messaging system wherein the status detection means detects whether or not an information terminal is being used and notifies the server of it and the decision means determines the information terminal as a receiver of the text message if the information terminal is being used. 
         [0024]    In other words, the status detection means determines whether or not the information terminal is being used. The determination is performed by detecting operation of a mouse or a keyboard of the information terminal such as a PC or operational status of a screen saver. In this case, the decision means of the server sends a text message to the PC if the destination PC is being used. Otherwise a destination can be determined so that the text message is sent to a mobile terminal. 
         [0025]    A fourth aspect of the present invention provides a text messaging system wherein an information terminal further has service detection means which detects the operational status of a network application in the information terminal and notifies a server of it. In this system, the status administration means of the server retains the operational statuses of a notified network application, and if the network application can operate on the server, the decision means determines the sending of a text message with the network application when the network application is operating on the information terminal. 
         [0026]    The service detection means detects that a predetermined network application for utilizing WWW (World Wide Web), IRC (Internet Relay Chat), E-mail, etc. is started and notifies the server of it. On the server side, the decision means determines the sending of a text message with a network application operating in a destination information terminal. For example, a text message is sent by e-mail if a destination PC is using an e-mail application or the text message is sent by chat if the destination PC is using a chat application. 
         [0027]    A fifth aspect of the present invention provides a text messaging system wherein the send means of an information terminal can notify a server that a text message was read, and the server further has reporting administration means which saves the text message sent to the information terminal and forwards the text message to the information terminal if that the text message was read is not notified. 
         [0028]    For example, the receive means of a PC displays a received text message on the corner of the screen. When the displayed message is deleted, the receive means determines that the text message is read and notifies the send means of it. The send means sends “already-read notification” to the receive means of the server. Meanwhile, the sent text message, the sender, the name of the destination, etc. are notified reporting administration means from the decision means and the reporting administration means saves them. The saved text message is deleted when “already-read notification” is received from the information terminal. However, as for a text message for which “already-read notification” is not notified, the saved text message is forwarded to a mobile terminal. 
         [0029]    A sixth aspect of the present invention provides a text messaging system wherein a reporting administration means forwards a text message sent to an information terminal according to the variation of the operational status of the information terminal. 
         [0030]    The status change of an information terminal is notified the reporting administration means from the status administration means. For example, if the notification of disconnection from a communication line is sent prior to “already-read notification”, the sent text message is forwarded to the mobile terminal. 
         [0031]    A seventh aspect of the present invention provides a text messaging system wherein if a text message sent to the information terminal is not read within a prescribed time period, the reporting administration means forwards the text message to the mobile terminal. 
         [0032]    The reporting administration means activates a timer when the sent text message is notified the reporting administration means from the decision means. The reporting administration means determines that the sent text message is not read in the information terminal if the text message is left after a prescribed time, and then sends the text message to the information terminal on the communication line. 
         [0033]    An eighth aspect of the present invention provides a text messaging system wherein the reporting administration means of the server notifies a text message sender that the text message is sent to a mobile terminal in a prescribed case. 
         [0034]    The reporting administration means notifies a text message sender that the text message is sent to a mobile terminal in a prescribed case. The prescribed case means a case that, for example, a text message was unable to be sent to an information terminal or a text message is not read in the information terminal. The prescribed case may include a case that, for example, a prescribed identifier is inserted into a text message. If a user needs the notification of a send result, he/she can hope for the notification by inserting an prescribed identifier into a text message to be sent. 
         [0035]    A ninth aspect of the present invention provides a text messaging system wherein the reporting administration means stores a text message and notifies the text message sender that the text message is stored if it cannot send the text message to a mobile terminal. 
         [0036]    There may be a case that a text message sent to a mobile terminal is stored in a server because the destination mobile terminal is out of the radio area or busy. If this is the case, the reporting administration means notifies the sending information terminal of it. A sending user can know if the text message is immediately transmitted. If the sending user requests the notification of a send result, he/she may add an identifier to a text message to be sent as described above. 
         [0037]    A tenth aspect of the present invention provides a text messaging system wherein the status detection means of an information terminal notifies a server of a phone number for contact, the status administration means of the server retains the notified phone number, and when a text message is sent from the information terminal to a mobile terminal, the decision means adds the phone number to a text message and sends it if the phone number of the sender for contact is set. 
         [0038]    The status detection means of the information terminal notifies the server of the phone number of the present whereabouts of a user. The status administration means of the server retains the notified phone number. The decision means refers to the status of a sending user when the destination of the text message from a PC such as a mobile terminal is selected. If the present phone number is set, the decision means adds the phone number to the text message as a callback phone number and sends it. If there is no present phone number, the decision means adds a default phone number of each user. This is convenient when a message receiver would like to inquire by phone instead of a character message. 
         [0039]    An eleventh aspect of the present invention provides a text messaging system further having a quasi information terminal connected to the communications line. The quasi information terminal has receive means, information acquisition means, send means, and information setting means. 
         [0040]    The receive means receives from a server a text message sent from a mobile terminal. The information acquisition means obtains the operational status of other information terminals according to received text messages. The send means sends the obtained operational status to the mobile terminal as a text message. The information setting means sets the operational status of other information terminals according to the received text message and notifies the server of it. 
         [0041]    For example, user A sends a message that he/she would like to know the status of user B to a quasi information terminal from a mobile terminal. The quasi information terminal obtains the status of user B from the server. The obtained information is sent from the quasi information terminal to the mobile terminal of user A as a text message. User A sends the phone number of the whereabouts from the mobile terminal to the quasi information terminal as a text message. The quasi information terminal sends a text message that changes the present phone number of user A for contact. 
         [0042]    A twelfth aspect of the present invention provides a text messaging system comprising one or more mobile terminals and information terminals respectively having communication means, a primary server connected to the above-mentioned information terminal via a communication line according to the above-mentioned communication means, and a secondary server connected to the above-mentioned mobile terminal and information terminal via a communication line according to the above-mentioned communication means. 
         [0043]    The information terminal has send means, receive means, and status detection means. The send means sends to the secondary server a text message addressed to another mobile terminal or information terminal. The receive means receives from the secondary server a text message sent from another mobile terminal or information terminal. The status detection means detects at least the status of connection to a computer network and notifies the primary server of it. 
         [0044]    The primary server has a status administration means that collects the operational status of an information terminal from the information terminal and retains it for each user. 
         [0045]    The secondary server has receive means, send means, and decision means. 
         [0046]    The receive means receives a text message from a mobile terminal or an information terminal. The send means sends a text message received from a mobile terminal or information terminal to another mobile terminal or information terminal. The decision means obtains the operational status of an information terminal from the primary server and determines the send mode of a text message according to the obtained operational status. 
         [0047]    This is a system configuration that the primary server and secondary server shares the function of the server according to the second aspect of the present invention. 
         [0048]    A thirteenth aspect of the present invention provides a text messaging system wherein an information terminal can further notify the secondary server that a text message was read and the secondary server further has a reporting administration means that forwards a text message to a mobile terminal if it is not notified that the text message was read. 
         [0049]    This is a system configuration that the primary server and secondary server shares the function of the server according to the fifth aspect of the present invention. 
         [0050]    The fourteenth aspect of the present invention provides a text message communication device having send means, receive means, and status detection means which is an information terminal that has communication means and sends and receives text messages among mobile terminals or other information terminals via a communication line and a server according to the above-mentioned communication means. 
         [0051]    The send means sends to the server a text message addressed to another mobile terminal or information terminal. The receive means receives from the server a text message sent from another mobile terminal or information terminal. The status detection means detects an operational status including the status of connection to a communication network and notifies the server of it. 
         [0052]    A fifteenth aspect of the present invention provides a server for text message communication which is a server connected to one or more mobile terminals or information terminals having communication means via a communication network according to the above-mentioned communication means and has receive means, send means, status administration means, and decision means. 
         [0053]    The receive means receives a text message from a mobile terminal or information terminal. The send means sends a text message received from a mobile terminal or information terminal to another mobile terminal or information terminal. The status administration means receives an operational status from an information terminal and retains it for each user. The decision means determines a send mode of text message according to operational status of the information terminal. 
         [0054]    A sixteenth aspect of the present invention provides a computer-readable recording medium which stores a text message communication program used for information terminals having communication means that sends and receives text messages among mobile terminals or other information terminals via a communication line or a server according to the above-mentioned communication means and stores a program for executing steps A to C below:
       A: a send step that a text message addressed to another mobile terminal or information terminal is sent to the server;   B: a receive step that the text message sent from another mobile terminal or information terminal is received from the server; and   C: a status detection step that an operational status including at least a status of connection to the communication line is detected and notified the server.       
 
         [0058]    A seventeenth aspect of the present invention provides a computer-readable recording medium which stores a text message communication management program used for a server connected to one or more mobile terminals or information terminals respectively having communication means via a communication line according to the above-mentioned communication means and stores a text message management program for executing steps A to D below:
       A: a receive step that a text message is received from a mobile terminal or information terminal;   B: a send step that the received text message is sent to another mobile terminal or information terminal;   C: a status administration step that the operational status of the information terminal is obtained and is retained for each user; and   D: a determination step that the send mode of the text message is determined according to the operational status of the information terminal.       
 
         [0063]    An eighteenth aspect of the present invention provides a text message communication method which uses one or more mobile terminals or information terminals respectively having communication means and a server connected to the above-mentioned mobile terminals and information terminals via a communication line according to the above-mentioned communication means, comprising:
       A: sending and receiving a text message between a mobile terminal or information terminal and another mobile terminal or information terminal via the server;   B: detecting the operational status of the information terminal including at least status of connection to the communication line and notifying the server of it;   C: retaining the operational status of the information terminal for each user in the server; and   D: determining the send mode of the text message according to the operational status of the information terminal by the server.       
 
         [0068]    A nineteenth aspect of the present invention provides a text message send/receive method which is used for information terminals that have communication means and send and receive text messages among mobile terminals or other information terminals via a communication line and a server according to the above-mentioned communication means, comprising:
       A: sending to the server a text message addressed to the above-mentioned mobile terminal or information terminal;   B: receiving from the server a text message sent from another mobile terminal or information terminal; and   C: detecting the operational status including at least the status of connection to the communication line and notifying the server of it.       
 
         [0072]    A twentieth aspect of the present invention provides a text message communication management method of a server connected to one or more mobile terminals or information terminals respectively having communication means via a communication line according to the above-mentioned communication means, comprising:
       A: receiving from a mobile terminal or information terminal a text message addressed to another information terminal;   B: sending the received text message to another mobile terminal or information terminal;   C: collecting the operational status of the information terminal including at least the status of the connection to the communication line and retaining it for each user; and   D: determining the send mode of the text message according to the operational status of the information terminal.       
 
         [0077]    From the following detailed description in conjunction with the accompanying drawings, the foregoing and other objects, features, aspects and advantages of the present invention will become readily apparent to those skilled in the art. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS  
         [0078]      FIG. 1  is a functional block diagram of a text messaging system according to the first embodiment of the present invention; 
           [0079]      FIG. 2  is a conceptual explanatory diagram of data stored in a status-storing module; 
           [0080]      FIG. 3  is a conceptual explanatory diagram of a message table in a reporting administration module; 
           [0081]      FIG. 4  is a display example of a window for setting status; 
           [0082]      FIG. 5  is a display example of a text message send window; 
           [0083]      FIG. 6  is a display example of a text message receive window; 
           [0084]      FIG. 7  is a display example of an e-mail text message receive window; 
           [0085]      FIG. 8  is a display example of an IRC text message receive window; 
           [0086]      FIG. 9  is a flowchart showing flow of an operational status notification process; 
           [0087]      FIG. 10  is a flowchart showing flow of a connection status notification process; 
           [0088]      FIG. 11  is a flowchart showing flow of a send process; 
           [0089]      FIG. 12  is a flowchart showing flow of a receive process; 
           [0090]      FIG. 13  is a flowchart showing process flow in a decision part; 
           [0091]      FIG. 14  is a flowchart showing flow of a status administration process; 
           [0092]      FIG. 15  is a flowchart showing flow of a reporting administration process; 
           [0093]      FIG. 16  is a flowchart showing flow of a timeout process; 
           [0094]      FIG. 17  is a flowchart showing flow of an operational status process; 
           [0095]      FIG. 18  is a flowchart showing flow of another process; 
           [0096]      FIG. 19  is a configuration of a text messaging system according to a second embodiment; 
           [0097]      FIG. 20  is a configuration of a text messaging system according to a third embodiment; and 
           [0098]      FIG. 21  is a conceptual configuration diagram of a conventional text messaging system using mobile terminals. 
       
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS  
       [0099]    Reference will now be made in detail to the embodiments, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below to explain the present invention by referring to the figures. 
       First Embodiment 
       [0100]      FIG. 1  shows a functional block diagram of a text messaging system according to the first embodiment. The text messaging system according to the first embodiment consists of server  1  connected to Internet  2  and mobile communication network  4 , multiple PC clients  3 , and multiple mobile phones  5 A,  5 B, . . . on the mobile communication network  4 . Incidentally, to simplify the drawing, only one PC client  3  is shown. The mobile phone can send and receive a text message. The server  1  is notified of a detected self status of each mobile phone such as “busy” or “out of radio area.” 
         [0101]    Server 
         [0102]    The server  1  has text message send part  6 , text message receive part  7 , status administration part  8 , status storage part  9 , decision part  10 , notification management part  11 , message storage part  12 , receive part  13 , send part  14 , and radio status detection part  15 . 
         [0103]    The text message send part  6  and text message receive part  7  send and receive a text message with the PC client  3  connected to the Internet  2 , and send and receive send result notification of a text message or already-read notification of a text message with the PC client  3 . 
         [0104]    The status administration part  8  receives operational status of the PC client from the PC client  3  and stores it in the status storage part  9  for each user. The operational status of the PC client is, for example, activation and completion of Internet applications, connection and disconnection of the Internet  2 , activation status of a screen saver, or PC in operation. The status administration part  8  receives stores prescribed information from the PC client  3  and stores it in the status storage part  9  for each user. The prescribed information is, for example, an e-mail address of each user, a nickname in IRC, a server and a channel, the phone number of a mobile phone, or present phone number. 
         [0105]      FIG. 2  shows an example of an operational status and a phone number of each PC client retained for each user by the status storage part  9 . As shown in  FIG. 2 , the status storage part  9  retains only one active status for each user. For example, even if one user has multiple PC clients, a PC for which an up-to-date status is set according to the user&#39;s operation is valid. In  FIG. 2 , if data are blank, it is determined that the status is null. 
         [0106]    For example, a status of each PC client in  FIG. 2  means the following:
       User A: PC does not operate because there is not an IP address.   User B: PC is in operation and is connected to a network.   User C: PC is in operation and is connected to a network. E-mail is currently in use.   User D: PC is in operation. Chatting by IRC. PC is in operation. There is a phone number of a destination.   User E: PC is in operation. A screensaver is active. There is a phone number of a destination.       
 
         [0112]    When the server  1  receives a text message addressed to any of the users, the decision part  10  operates as follows. The decision part  10  refers to the operational status of a PC client of the relevant user and determines a send mode which can receive the text message in real time. At this time, if an Internet application is active on the PC client of the relevant user, the decision part  10  determines that the text message is sent with the Internet application. If a PC client of the relevant user does not exist, is not connected to the Internet, or is not used, the mobile phone of the relevant user is determined as the destination of the text message. If necessary, the text message is converted after the determination of a send mode, and the send request of the text message is done to the message send part  6  or send part  14 . The decision part  10  notifies the text message to be sent to the notification management part  11  to monitor the send result of the text message. 
         [0113]    The notification management part  11  retains the text message sent in response to the notification from the decision part  10  in a message table. The notification management part  11  also sends send notification to the sender if the status of the text message corresponds to a prescribed case. The prescribed case is such that the other party did not read the text message within a prescribed time, the text message was not read while the network application is active, the text message is not read while the PC is connected to the Internet  2 .  FIG. 3  shows a conceptual diagram of the message table. In the message table shown in the figure, the name of a sender, the name of a receiver, the type of receiver, the timer ID, and the contents of the text message are retained. 
         [0114]    The message storage part  12  temporally stores the text message if the text message is not immediately sent to the mobile terminal  5 A,  5 B, etc. 
         [0115]    The receive part  13  and send part  14  are for sending and receiving the text message among mobile phones  5 A and  5 B. 
         [0116]    Radio status detection part  15  detects notification from the mobile phone  5 A or  5 B and stores the status of the mobile phone such as within radio area or busy. 
         [0117]    PC Client 
         [0118]    The PC client  3  has text message send/receive  21 , network service detection part  22 , PC operation detection part  23 , and status setting part  24 . 
         [0119]    The text message send/receive part  21  sends and receives the text message with the server  1 , notifies the user of the send result of the text message sent from the server  1 , and further notifies the server  1  that the received text message was read according to the input of the user. Incidentally, the text message send/receive part  21  may be an independent application or another Internet application for sending and receiving text messages can be substituted. An e-mail application or an IRC application is cited as an example of an application for sending and receiving text messages. 
         [0120]    The network service detection part  22  detects the activation and completion of a network application. Specifically, it detects the connection and disconnection of an webpage or the activation and completion of an e-mail or IRC application, and notifies the status setting part  24  of it each time the status changes. At the same time, it detects an e-mail address, a nickname used for IRC, a server, and a channel and notifies of them. 
         [0121]    The PC operation detection part  23  monitors a user status and notifies the status setting part  24  of it each time the status changes. Specifically, it monitors whether or not there is input by keyboard or mouse, the PC client  3  connects to or disconnects from a network by LAN or dial up, the screensaver is active, input by keyboard or mouse is done on the top window in multiwindow. The PC operation detection part  23  also sends “connection message” to the status administration part  8  of the server  1  at every definite period of time. If “connection message” does not come within a period of time, the status administration part  8  determines that the PC client  3  is disconnected from the Internet  2 . 
         [0122]    The status setting part  24  notifies the status administration part  8  of the server of the status of the PC client detected by the above-mentioned service detection part  22  and the PC operation detection part  23 . The status setting part  24  receives the mobile phone number of the user and the present phone number and notifies the status administration part  8  of the server  1  of them. Furthermore, the status setting part  24  obtains the operational status of the PC client of another user, destination, contact address, etc. from the server  1  and outputs them. 
       Processes on PC Client 
       [0123]    Next gives a specific explanation of the process done by the PC client according to the embodiment (process done by the application) showing screen examples and flowcharts. 
         [0124]    (1) Screen Example 
         [0125]    “In” Status Setting Window 
         [0126]      FIG. 4  shows an example of a window for setting whereabouts of the user. The right side of the screen shown in the figure is a presence status setting window. This window is for writing presence status of the user (present, absent, away from seat, in council, in laboratory, etc.), his/her destination, phone number, brief schedule, etc. Input in the window by the user notifies the status administration part of the server  1  of a presence status. The presence status of another user obtained from the server  1  by the status setting part is displayed on a window on the left side in the figure. 
         [0127]    Text Message Send Window 
         [0128]      FIG. 5  shows an example of a message send window in the PC client  3 . Selecting the receiver of a text message on the above-mentioned left window in the figure opens the text message send window. With this, a brief message such as “hey, come on” or “call me” can be notified substantially in real time if the other party connects to the Internet  2  with a PC client. Furthermore, by checking the send result notification box, the result notification of a sent message can be asked for. 
         [0129]    Text Message Receive Window 
         [0130]      FIG. 6  shows the receive window of text messages. The receive window is displayed in the corner of the screen without being displayed in front of the window being used. On the right side of the window, there is a button for replying by call or text message. This button is for immediately replying to a received text message. The button on the right edge is for abandoning the text message without replying to it. By pressing any of the buttons or closing the window, the already-read message showing the text message was read is sent to the server  1  from the PC client  3 . The text message receive part  6  of the server  1  that received notification notifies the notification management part  11  of an already-read notification. 
         [0131]    If the PC client  3  where an Internet application is in operation received a text message, the receive window is displayed with the application window.  FIG. 7  is a screen example when a text message is received while an e-mail application is being used. A message from user B indicated as to-be-read in  FIG. 7  is a message send by the present invention.  FIG. 8  is a screen example when a text message is received while the IRC application is being used. If these Internet application are being used, the mail becoming already-read or reply input to a chat is detected with the service detection part  22  of the PC client  3  and is notified the server  1 . 
         [0132]    (2) Operational Status Notification Process 
         [0133]    Once a PC is powered and connected to the server via the Internet, the operative status notification process shown in  FIG. 9  and the connection status notification process shown in  FIG. 10  are commenced. 
         [0134]    At first in step S 1 , the above-mentioned network service detection part  22  and the PC operation detection part  23  monitor the operational status of the PC client  3 . 
         [0135]    In step S 2 , the service detection part  22  and the PC operation detection part  23  determine whether or not there is a change in the operational status. If there is a change, a new status is notified the status setting part  24  and step S 3  ensues. If there is no changes in the operational status, the process returns to step S 1 . 
         [0136]    In step S 3 , the status setting part  24  received the notification notifies the server  1  of a new operational status. At the moment, information for identifying the user such as a user name or an IP address is added and notified, and the process returns to step S 1  to monitor occurrence of a new status change. 
         [0137]    In other words, in steps S 1  to S 3 , a process that the change of the operational status of the PC client is notified the server  1  is performed. 
         [0138]    Meanwhile, the PC operation detection part  23  performs the connection status notification process shown in  FIG. 10  in addition to the monitor and detection of the PC operation in the above-mentioned steps S 1  and S 2  and notifies the server  1  of the connection status. 
         [0139]    At first, in step S 21 , the PC operation detection part  23  determines whether or not the PC client  3  is connected to the Internet  2 . If the result is “Yes”, step S 22  ensues. If the result is “No”, the process returns to step S 21  again and repeat the above-mentioned determination. 
         [0140]    In step S 22 , the PC operation detection part  23  sends the connection notification to the server  1  via the status setting part  24 . 
         [0141]    In step S 23 , the PC operation detection part  23  waits for the elapse of predetermined time T and if the time elapsed, the process returns to step S 21  and repeats the above-mentioned determination and connection notification. 
         [0142]    Namely, in steps S 21  to S 23 , while the PC client  3  is connecting to the Internet  2 , a process that the connection notification to the server  1  is performed every time the predetermined time T elapses. 
         [0143]    (3) Send Process 
         [0144]    When the PC is powered and connected to the server via the Internet, the send process as shown in  FIG. 11  are commenced along with the above-mentioned operation status notification process and the connection status notification process. 
         [0145]    In step S 31 , the text message send/receive part  21  determines whether or not the other party a text message is sent to was selected. If the result is “Yes”, step S 32  ensues. Otherwise the process repeats the step and waits for the other party to be selected. 
         [0146]    In step  32 , the text message send/receive part  21  opens the text message send window in  FIG. 5  and accepts the input of a text message to be sent. 
         [0147]    In step S 33 , the text message send/receive part  21  waits for the “Send” button to be pressed. When the button is pressed, the input message is sent to the serve with the sender&#39;s name and the process returns to step S 31 . 
         [0148]    (4) Receive Process 
         [0149]    When the PC is powered, a receive process as shown in  FIG. 12  is commenced in parallel with the above-mentioned process. 
         [0150]    At first, in step S 41 , the text message send/receive part  21  waits for a reception from the server  1  and if there is a reception, step S 42  ensues. 
         [0151]    In step S 42 , the text message send/receive part  21  determines whether or not the reception is a text message from another user. If the result is “Yes”, step S 43  ensues. Otherwise step S 50 , which will be descried below, ensues. 
         [0152]    In step S 43 , the text message send/receive part  21  opens the receive window exemplified in  FIG. 6 ,  7 , or  8 , notifies the user of the received text message part, and obtains a sender number included in the sent text message such as an IP address. 
         [0153]    In step S 44 , the text message send/receive part  21  determines whether or not the reply button was pressed. If the above-mentioned read-and-abandon button was pressed or the window was closed, step S 45  ensues. If the reply button was pressed, step S 46  ensues. 
         [0154]    In step S 45 , the text message send/receive part  21  sends a already-read notification that notifies the server that the text message was read. 
         [0155]    In step S 46 , the text message send/receive part  21  determines whether the pressed reply button is the button for call. If the button for call was pressed, the step S 47  ensues. If the reply button by text message was pressed, step S 48  ensues. 
         [0156]    In step S 47 , the text message send/receive part  21  dials the mobile-phone number of the other party or the phone number of current whereabouts that is notified with the text message. The receive wait state in step S 41  returns. 
         [0157]    In step S 48 , the text message send/receive part  21  opens the text message send window as shown in the above-mentioned  FIG. 5  and accepts the input of a text message. By the text message being input and the “Send” button being pressed in step S 49 , the inputted text message is sent. The destination of the text message to be sent is set to the sender of the text message that is previously obtained. 
         [0158]    If it is determined that the reception is not a text message in step S 42 , step S 50  ensues. In step S 50 , the text message send/receive part  21  determines whether or not the send result of the text message is received. If the reception is the send result, then step S 51  ensues, the send result notified from the server  1  is notified the user, and the receive wait state in step S 41  returns. For example, a send result “The message addressed to 020-222-222 was not read and forwarded to the mobile phone.” is displayed on the screen. If the reception is not the send result, step S 52  ensues. 
         [0159]    In step S 52 , the text message send/receive part  21  determines whether or not the reception is an already-read notification. If the reception is the already-read notification, step S 53  ensues and it is notified the user that the sent text message is read by the other party. For example, as the result display of the mail in  FIG. 7 , the text message is displayed in catalogue and the relevant message part is displayed with half-tone dot meshing or a color. After that the receive wait state of step S 41  returns. 
       Processes on the Server 
       [0160]    The flow of the process performed by the server  1  is explained with a flowchart. In the following description, the operational status of each PC client is shown in the above-mentioned  FIG. 2 . The server  1  can support an e-mail or IRC application used by the PC client. To simplify the description, a case that a text message is sent from the mobile phone  5 A of user A to the mobile phone of another user C is described as a example. 
         [0161]    (1) Decision Process 
         [0162]    At first, flow of the process performed by the decision part  10  based on  FIG. 13  is explained. 
         [0163]    In step S 61 , by the decision part  10  receiving from the receive part  13  of the server  1  a text message sent from the mobile phone  5 A of user A, the process is commenced. The text message includes the mobile phone number, contents of the text message, sender information, and the presence of the notification of the send result. Now assume that the mobile phone number of user C is “020-444-4444”, contents of the text message is “Returns to the office at 3 p.m.”, and the sender information is the mobile phone number of user A i.e. “020-444-4444.” 
         [0164]    Incidentally, when a text message is sent with each application from the PC client  3 , the message receive part  7  of the server  1  receives the text message and notifies the decision part  10  of it. In this case, information for identifying the sender and receiver is a user&#39;s name or an IP address. If the text message is sent by e-mail, the information is an e-mail address; if the text message is sent by IRC, the information is a nickname. 
         [0165]    In step S 62 , the decision part  10  searches in the status storage part  9  with the received mobile phone number “020-444-4444” as a search key and obtains the status of user C. Similarly, the decision part  10  also obtains the status of the sender. 
         [0166]    In step S 64 , the decision part  10  determines whether or not the PC client of user B is connected to the Internet  2 . In this example, since the IP address of user C is not empty, it is determined that the PC client is connected and step S 65  ensues. If it is not connected, the text message is sent to the send part  14  and step S 74 , which is described below, ensues. 
         [0167]    In step S 65 , it is determined whether or not the PC client  3  of user C is in operation. Namely, if a screensaver is active on the PC client of user C, it is assumed that user C is not in front of the PC and a mobile phone is selected as a destination. The received text message is stored in the message storage part  12 . Conversely, a screensaver is not active on the user C&#39;s PC in this example. Therefore the other party is assumed to be in front of the PC, the PC client of user C is selected as a destination, and step S 66  ensues. 
         [0168]    In step S 66 , the decision part  10  determines whether or not an Internet application of the PC client is active on the PC client  3  of user C. Specifically, by referring to  FIG. 2 , it is understand that the e-mail address of user C is written and the e-mail is being used. In this case, step S 67  ensues. Conversely, if the Internet application is not active, step S 68 , which is described later, ensues. 
         [0169]    In step S 67 , the decision part  10  obtains a necessary parameter for sending the text message with an e-mail application such as an e-mail address from the status storage part  9 . At this moment the decision part  10  also obtains the name of user A. 
         [0170]    In step S 68 , the decision part  10  obtains a necessary parameter for directly sending the text message such as an IP address from the status storage part  9 . At this moment the decision part  10  also obtains the name of user A. 
         [0171]    In step S 69 , the decision part  10  notifies the text message send part  6  of the text message and the information obtained in step S 67  or S 68  and requests send. In this example, the text message is configured to an e-mail message by text message send part  6  and sent to the e-mail address of user C. In the PC client  3  of user C which received the e-mail message, the text message is displayed on an window shown in  FIG. 7 . The e-mail message sent from the server is usually sent to a client via an e-mail server. 
         [0172]    In above-mentioned step S 63 , if it is determined that the PC client of user C is not active, step S 70  ensues. 
         [0173]    In step S 70 , the decision part  10  obtains a parameter which is necessary to send the text message to the mobile phone of user C such as a mobile phone number from the status storage part  9 . At the same time, the decision part  10  also obtains the name of user A, which is a sender, the mobile phone number of user A, and the number of whereabouts. If it is determined there is no statuses and step S 70  ensues, the parameter of user C is not obtained. Consequently, the other party&#39;s phone number that were sent when the previous message was received “020-444-4444” is set to the other party&#39;s phone number and next step S 71  proceeds. 
         [0174]    In step S 71 , the decision part  10  passes the information obtained in the above-mentioned step S 70  to the send part  14  and requests radio transmission. 
         [0175]    In step S 72 , the decision part  10  determines whether or not the mobile phone of user C can notify the server  1  that the text message was read and the sender requests notification. If both is possible, step S 73  ensues. If the notification from the mobile phone is impossible, the process returns to step S 61  and waits for the reception of the text message. 
         [0176]    In step S 73 , the decision part  10  sends the sent text message, the sender&#39;s name, and send notification including a send terminal and a receive terminal to the notification management part  11 . And step S 61  returns. As described later, the notification part  11  writes contents of the received send notification in the message table. 
         [0177]    In the above-mentioned step S 64  or S 65 , if it is determined that the PC client of user C is not connected to the Internet or the PC is not currently used, step S 47  ensues. 
         [0178]    In step S 74 , the decision part  10  determines whether or not sender A requests notification of a send result. If sender A requests the notification, then the above-mentioned step S 70  ensues and the notification to the mobile phone is sent. 
         [0179]    In step S 75 , the decision part  10  creates result notification addressed to the sender indicating that the text message is temporally stored in the message storage part  12 . 
         [0180]    In step S 76 , the decision part  10  determines send mode according to the status of sender A sends the result notification created in step S 74 . Namely, the decision part  10  sends the text message to the mobile phone because the PC client of receiver C is not connected to the Internet and notifies user A that a text message indicating it. The message is sent to the decision part  10  and transmitted to sender A in an appropriate way. 
         [0181]    (2) Status Administration Process 
         [0182]    Flow of status administration process managing the operational status of the PC client in the server  1  is described next with a flowchart shown in  FIG. 14 . 
         [0183]    At first, it is notified the status administration part  8  of the server  1  from the status setting part  24  that the operational status in the PC client  3  of the user changed in step S 81  and the process is commenced. 
         [0184]    In step S 82 , the status administration part  8  updates the contents of the status storage part  9  for each user based on the received contents. 
         [0185]    In step S 83 , the status administration part  8  further notifies the notification management part  11  of the change of the operational status. 
         [0186]    (3) Reporting Administration Process 
         [0187]    Reporting administration process performing notification to the sender from the server  1  is described below with a flowchart shown in  FIG. 15 . In this embodiment, the following four processes are performed: (i) main process, (ii) timeout process of stored text message, (iii) process of stored text message according to a receiver status, and (iv) process other than above. 
         [0188]    (i) Main Process 
         [0189]    At first, in step S 91  in  FIG. 15 , receiving events such as message, timeout process, and status notification of user&#39;s activities commences the following process. 
         [0190]    In step S 92 , the notification management part  11  determines whether or not the received event is a text message. If the event is a text message, step S 93  ensues. Otherwise step S 100 , which will be described later, ensues. 
         [0191]    In step S 93 , the notification management part  11  determines whether or not the received text message is send notification notified from the decision part  10  in step S 37  in  FIG. 13 . If the received text message is the send notification, step S 94  ensues. If the received text message is not the send notification, no process is performed and step S 91  returns. 
         [0192]    In step S 94 , the notification management part  11  activates a timer counting a prescribed time and manages the message table with timer ID. 
         [0193]    In step S 95 , the notification management part  11  writes timer ID in addition to contents of the text message included in the send notification, sender and receiver, and send/receive type. Then step S 95  ensues. 
         [0194]    If it is determined in step S 92  that the text message is not send notification or is not an usual text message, then step S 100  ensues. 
         [0195]    In step S 100 , the notification management part  11  determines whether or not the received event is timeout notification. If the event is timeout notification, message timeout handling routine in step S 300  ensues. In the timeout handling routine, stored text messages that timed out are deleted. Timeout process is described later. If the received event is not timeout notification, step S 200  ensues. 
         [0196]    In step S 200 , the notification management part  11  determines whether or not the received event is notification of the operational status of a PC client. If the event is the notification of the operational status, step S 500  ensues and another handling routine is performed. The operational status handling routine in step S 400  and another operational routine in step S 500  are described later. 
         [0197]    (ii) Timeout Process 
         [0198]    If it is determined in step S 100  that the event is timeout notification, the timeout handling routine in step S 300  ensues.  FIG. 16  is a flowchart showing flow of the timeout handling routine. 
         [0199]    At first in step S 301 , the notification management part  11  determines whether or not the timed-out text message is left in the message table. If the text message is left, it is assumed that already-read notification from the receiver in a predetermined time and step S 302  ensues. If the text message is not left, the main routine in above-mentioned  FIG. 15  returns. 
         [0200]    In step S 302 , the notification management part  11  determines whether or not the type of the receiver of the timed-out text message is a mobile phone. If the type is a mobile phone, step S 303  ensues; if the type is a PC client, step S 307  ensues. 
         [0201]    In step S 303 , the notification management part  11  determines whether or not the sender hopes for notification of send result of the text message. If the sender hopes for the notification, step S 304  ensues. If the sender does not hope for the notification, step S 306  ensues. 
         [0202]    In step S 304 , the notification management part  11  creates to-be-read result notification that indicates the sent text message was not read and step S 305  ensues. 
         [0203]    In step S 305 , the notification management part  11  notifies the decision part  10  of created to-be-read result notification. The decision part  10  selects appropriate send means and send method from the sender status and sends the to-be-read result notification to the sender. 
         [0204]    In step S 306 , the notification management part  11  deletes an entry of relevant text messages from the message table and the main routine in above-mentioned  FIG. 15  returns. 
         [0205]    That is to say, in steps S 303  to S 305 , result notification indicating “the text message is sent to the mobile phone, but it was not read.” is sent to the sender. 
         [0206]    In step S 302 , if the receiver is determined as a PC client, step S 307  ensues. 
         [0207]    In step S 307 , as is the case with the above-mentioned S 303 , the status administration part  11  determines whether or not the sender hopes for notification of send result. If the sender hopes for the notification, step S 308  ensues. If the sender does not hope for the notification, step S 315  ensues. 
         [0208]    In step S 308 , the notification management part  11  creates radio send result notification indicating the text message is sent to the mobile phone. 
         [0209]    In step S 309 , the notification management part  11  notifies the decision part  10  of the created radio send result notification. The decision part  10  that received the notification notifies the sender of the above-mentioned result notification in a send mode according to the operational status of the sender&#39;s PC client. 
         [0210]    In step S 310 , the notification management part  11  passes the text message to the send part  14  and deletes the entry of the relevant text message from the message table. 
         [0211]    In step S 311 , the notification management part  11  obtains necessary information such as the receiver&#39;s mobile phone number to send the text message to the mobile phone from the status storage part  9 . 
         [0212]    In step S 312 , the notification management part  11  notifies the send part  14  of send information and requests the transmission of text message. 
         [0213]    In step S 313 , the notification management part  11  determines whether or not it can be notified that the receiver&#39;s mobile phone read the text message. If it can be notified, the step S 314  ensues. Otherwise the main routine in above-mentioned  FIG. 15  returns. 
         [0214]    In step S 314 , the notification management part  11  issues send notification including sender/receiver, send/receive type, etc. This send notification is written in the message table in the above-described step S 94 . 
         [0215]    (iii) Operational Status Process 
         [0216]    In step S 200 , if the received event is determined as the change notification of the operational status of the PC client, step S 400  operational status handling routine shown in  FIG. 17  ensues.  FIG. 17  is a flowchart showing flow of the operational status handling routine. 
         [0217]    At first in step S 401 , the notification management part  11  determines whether or not the text message addressed to the PC client with the operational status changed is in the message table. If it is in the message table, step S 402  ensues. If not, the main routine returns. 
         [0218]    In step S 402 , the notification management part  11  determines whether or not the change of the status corresponds to “disconnection from the Internet” or “Screensaver active.” If it corresponds to either of the above two statuses, step S 403  ensues. If it is not corresponds to any of the above two statuses, step S 410  ensues. 
         [0219]    In step S 403 , the notification management part  11  determines whether or not the sender hopes for the send notification sent to the sender, and if the sender for it step S 404  ensues. If the sender does not hope for it step S 416  ensues. 
         [0220]    In step S 404 , the notification management part  11  creates radio send result notification and notifies the decision part of it, assuming that the a text message that was previously sent to the PC client. For example, Radio send result notification with a message “The message addressed to 020-222-222 was not read in the PC and was sent to the mobile phone.” is created. The decision part determines a send mode according to the status of the sender and requests it to be sent from the text message send part  6  or the send part  14 . 
         [0221]    In step S 405 , the notification management part  11  passes the text message to the send part  14  and deletes the entry of the relevant text message from the message table. 
         [0222]    In step S 406 , the notification management part  11  obtains necessary information such as a mobile phone number to send it to the mobile phone from the status storage part  9 . 
         [0223]    In step S 407 , the notification management part  11  sends the obtained send information to the send part  14  and requests sending. 
         [0224]    In step S 408 , the notification management part  11  determines whether or not that the receiver&#39;s mobile phone read can be notified. If it is possible, step S 409  ensues. Otherwise the main routine in  FIG. 10  returns. 
         [0225]    In step S 409 , the notification management part  11  creates send notification including the sent text message, sender/receiver, and send/receive type, etc. This send notification is written in the message table in step S 94  of the above-mentioned main routine. 
         [0226]    If it is determined that the status change notified in above-mentioned S 402  is not disconnection or activation, step S 410  ensues. 
         [0227]    In step S 410 , the notification management part  11  determines whether or not the notified status change is completion notification of an Internet application that is already sent. If it is completion notification, step S 411  ensues; otherwise the main routine in  FIG. 15  ensues. 
         [0228]    In step S 411 , the notification management part  11  obtains send information necessary to send to PC client such as an IP address by referring to the status storage part  9 . 
         [0229]    In step S 412 , the notification management part  11  passes the send part  14  an obtained send message or text message and requests sending. 
         [0230]    In step S 413 , the notification management part  11  deletes the relevant text message from the message table. 
         [0231]    In step S 414 , the notification management part  11  determines whether or not the sender hopes for the notification of the send result. If the user hopes for the notification, step S 415  ensues. If not, the main routine indicated in  FIG. 15  ensues. 
         [0232]    In step S 415 , the notification management part  11  creates a PC send result notification and notifies the decision part  10  of it, assuming that a text message previously sent to an Internet application of the PC client was not read. For example, a PC send result notification with a content “a text message addressed to channel #CA was not read and was sent to PC” is created. The decision part  10  selects a send means and send method according to the sender&#39;s status and requests sending from the text message send part  6 . 
         [0233]    In step S 416 , the notification management part  11  obtains information necessary to send to the mobile phone such as the mobile phone number from the status storage part  9 . 
         [0234]    In step S 417 , the notification management part  11  passes the obtained information to the send part  14  and requests sending. 
         [0235]    (iv) Other Process 
         [0236]    In step S 200 , if it is determined that the received event is not a change notification of the operational status, another handling routine in step S 500  ensues.  FIG. 18  is a flowchart showing flow of another handling routine. 
         [0237]    At first in step S 501 , the notification management part  11  determines whether or not the received event is text message acquisition notification from the receiver. For example, if acquisition notification from a PC client or mobile terminal that received a text message is received by the text message receive part  7  or the receive part  13 , the acquisition notification is sent to the notification management part  11 . There may also be the case in which reply to an e-mail message or a confirmation command sent in the same channel of IRC may be detected by the text message receive part  7  and the acquisition notification  11  is sent to the notification management part  11 . If the received event is acquisition notification, step S 502  ensues; otherwise a below-described step S 503  ensues. 
         [0238]    In step S 502 , the notification management part  11  deletes the entry of the relevant text message from the message table and the main routine in  FIG. 15  returns. 
         [0239]    In step S 503 , the notification management part  11  determines whether or not the received event is notification indicating a text message to the mobile phone is stored. If it is the notification, step S 504  ensues. Otherwise the main routine in  FIG. 15  returns. That is to say, if a text message is stored in the message storage part  12 , storage notification is sent to the notification management part  11  from the send part  14 . 
         [0240]    In step S 504 , the notification management part  11  determines whether or not the sender hopes for the notification of a send result. If the sender hopes for the notification, step S 505  ensues. If not, the main routine in  FIG. 15  ensues. 
         [0241]    In step S 505 , the notification management part  11  creates storage result notification indicating a text message is stored. The decision part  10  determines a send mode according to a sender&#39;s status and requests sending of storage result notification from the send part  6  or the send part  14 . 
         [0242]    In the above process, time to be timed out or notification setting when a text message is not read immediately may be set for the server from a mobile phone or a PC client via the Internet. The setting can also be performed with a text message in a prescribed format. 
       Second Embodiment 
       [0243]    A mobile terminal can obtain arbitrary information by sending a text message in a prescribed format from the mobile terminal with the text messaging system shown in the above-mentioned first embodiment. 
         [0244]    For example,  FIG. 19  shows a configuration diagram of a text messaging system that changes or refers to the operational status of a PC client managed by the server  1 . In  FIG. 19 , information server  30  is used as a PC client. The mobile terminal  5  sends a text message in a format for sending the text message to the PC client. The information server  30  pretends to be the PC client and sets an operational status form the server  1 . 
         [0245]    For example, a destination or schedule information is sent from a mobile terminal  5  to a phone number of the information server  30  as a text message in a prescribed format. As described, the server  1  sends the text message to the information server  30 . The information setting part  26  of the information server  30  that received the text message analyzes the received text message, and notifies the status administration part  8  of information that changes the operational status of the sender. 
         [0246]    The information setting part  26  sends a text message indicating that the destination of another user needs to be known with a phone number of the other user. Then the server  1  sends the text message to the information server  30 . 
         [0247]    The information acquisition part  25  of the information server  30  analyzes the received text message and obtains the operational status of the other PC client with the phone number as a search key. The obtained information is sent as a text message from the information server to the number of the sender mobile terminal. Accordingly, for example, current whereabouts of another user can be identified and a call can be made to him/her. 
       Third Embodiment 
       [0248]    As shown in  FIG. 20 , the radio server  1   b  may be made to have the message storage part  12  and radio status detection part  15  by installing a radio sever  1   b  independent of a text message server  1   a . In this case, the receive part  13   a  and  13   b  and the send part  14   a  and  14   b  are respectively installed in the text message server  1   a  and the radio server  1   b . The status administration server  1   c  may also be made to have the status administration part  8  and decision part  9  by further installing an independent status administration server  1 . 
       Fourth Embodiment 
       [0249]    A where-to-call number may be sent with a text message so that the other party can immediately call back when the text message is sent from a PC client or a mobile phone. A receiver can call the number and talk to the other party as soon as he receives the text message. For example, the decision part  10  refers to the sender&#39;s status as well as the receiver&#39;s status. If the number of current whereabouts is set in the status storage part  12 , the decision part  10  sends the phone number as a callback number with the text message. If the number of current whereabouts is not set, the mobile phone number may be sent with the text message as a callback number. 
       Fifth Embodiment 
       [0250]    In addition to the above-mentioned embodiment, it is conceivable that a schedule in a particular condition is obtained or a function such as acquisition of e-mail is added to the server  1 . Services can easily be added without changing server configuration. 
       Sixth Embodiment 
       [0251]    In the above-mentioned embodiment, a single mobile communication network and a single Internet are respectively shown. However, they may be multiple. Since the status administration part of the server  1  holds only one active status per user, if the number of networks increases, it can be supported. 
       INDUSTRIAL APPLICABILITY 
       [0252]    Use of this invention allows a text message to be sent in a send mode according to the other party&#39;s status and to be sent and received substantially in real time. By notifying the sender of send result such as the text message not being checked by the other party, the text message can be notified in another send mode. Furthermore, the sender can know which send mode is used in which the text message was sent and thus communications with texts can be smoothly performed in real time. 
         [0253]    While only selected embodiments have been chosen to illustrate the present invention, to those skilled in the art it will be apparent from this disclosure that various changes and modifications can be made herein without departing from the scope of the invention as defined in the appended claims. Furthermore, the foregoing description of the embodiments according to the present invention is provided for illustration only, and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.