JP5150078B2 - Communication terminal and communication control program - Google Patents

Description

  The present invention relates to a communication terminal and a communication control program.

  Conventionally, in a PC (personal computer), a technique for chatting while playing music by registering music data in a chat and a shared server on a network (a shared chat room is installed) has been proposed. (For example, refer to Patent Document 1).

JP 2001-184292 A

  However, in the above-described prior art, in the case of accumulation distribution in which music data is accumulated in a shared server and the music data accumulated in response to a request from the PC is distributed, acquisition of the music data is completed on the PC Until then (for streaming distribution, music data is always sent in packets), there is a problem that packets required for chatting are compressed and traffic increases.

  In addition, since the chat service for mobile phones exchanges data using packets with a relatively small capacity, there is a problem that when music data is transmitted, it takes time to exchange messages.

  In addition, the above-described prior art has a problem that music data that the other party wants to listen to needs to be uploaded to a shared server, and music cannot be easily shared and enjoyed.

  Therefore, an object of the present invention is to provide a communication terminal and a communication control program capable of reliably transmitting stored data to a communication partner who wants to reproduce the data without causing an increase in traffic. To do.

In order to achieve the above object, a communication terminal according to the first aspect of the present invention comprises a storage means for storing data, a specifying means for specifying a terminal for reproducing the data stored in the storage means, and the specifying means. Calling means for calling the designated terminal using the first communication system, and second communication between the communication terminal and the designated terminal based on a response from the designated terminal to the call by the calling means. Determining means for determining whether the data can be transmitted using the communication system; and when the determining means determines that the data can be transmitted, the communication terminal in the second communication system is identified. Information to be transmitted to the designated terminal using the first communication system, and based on the information for identifying the communication terminal with respect to the designated terminal. Communication control means for controlling to receive data using the second communication system, and when the determination means determines that the data can be transmitted, the data is read from the storage means, and the first And a control means for controlling to transmit the data to the designated terminal using the second communication system while maintaining communication by the communication system.

As a preferred mode, for example, as in claim 2 , in the communication terminal according to claim 1 , the response from the designated terminal to the call by the calling means includes position information of the designated terminal. And further comprising position information storage means for storing position information of the terminal, wherein the determination means includes the position information of the designated terminal and the position information of the terminal stored in the position information storage means. Based on the above, it is determined whether or not the data transmission using the second communication system is possible.

Further, as a preferred aspect, for example, as in claim 3 , in the communication terminal according to claim 1 , identification information for storing identification information for specifying the designated terminal in the second communication system And further comprising storage means, wherein the determination means stores the identification information within a range in which communication using the second communication system is possible based on a response from the designated terminal to the call by the call means. By determining whether or not the specified terminal specified by the identification information stored in the means exists, it is determined whether or not the data can be transmitted between the communication terminal and the specified terminal It is characterized by doing.

Further, as a preferred aspect, for example, as in claim 4 , in the communication terminal according to any one of claims 1 to 3 , the communication terminal further comprises a reproducing means for reproducing the data stored in the storage means, and the designation means Designates a terminal for reproducing the data when the reproducing means is reproducing data, and the control means uses the second communication system while maintaining reproduction of the data by the reproducing means. The data is transmitted to the designated terminal.

As a preferred aspect, for example, as in claim 5 , in the communication terminal according to any one of claims 1 to 4 , the first communication system is a communication system via a relay system on a communication line. And the second communication system is direct communication with the designated terminal.
Moreover, as a preferable aspect, for example, as in claim 6 , in the communication terminal according to any one of claims 1 to 5 , the control unit uses the second communication system by the determination unit. When it is determined that the transmission of the data is impossible, the switching control is performed so that the data is transmitted and received by the communication in the first communication system.

Also, for this purpose achieved, the communication control program according to the invention of claim 7, wherein the computer to a designation means for designating a terminal for reproducing the data stored in advance in the storage unit, designated by the designation means Calling means for calling a terminal using the first communication system, and a second communication system between the communication terminal and the designated terminal based on a response from the designated terminal to the call by the calling means Determining means for determining whether or not the transmission of the data using is possible, and for determining the communication terminal in the second communication system when the determination means determines that the transmission of the data is possible Information is transmitted to the designated terminal using the first communication system, and based on information for identifying the communication terminal with respect to the designated terminal When it is determined by the determination means that the data can be transmitted, the data is read from the storage means, the communication control means for controlling to receive data using the second communication system, and the first A communication control program that functions as control means for controlling transmission of the data to the designated terminal using the second communication system in a state in which communication by the communication system is maintained. .

  According to the present invention, when a terminal for reproducing data is designated, this terminal is called using the first communication system, and whether or not data transmission using the second communication system is possible based on a response to the call If it is determined that it is possible, since the data is transmitted using the second communication system while maintaining communication by the first communication system, the data is stored without causing an increase in traffic. An advantage is obtained in that it is possible to reliably transmit existing data to a communication partner who wants to reproduce the data.

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

A. First embodiment A-1. Configuration of First Embodiment FIG. 1 is a block diagram showing a configuration of a communication system according to a first embodiment of the present invention. In the figure, communication terminals 100 and 200 are composed of, for example, a mobile phone or the like, and are used by FM radio waves (communication system using an FM frequency band) S3 when performing a voice call or chat using text information by wireless communication S1. Music data and video data can be transmitted and received and played back. In the following description, it is assumed that the communication terminal 100 is a transmission-side communication terminal and the communication terminal 200 is a reception-side communication terminal.

  The base station 300 connects the communication terminals 100 and 200 to the communication service system 400 by wireless communication S1. The communication service system 400 includes a relay system including an exchange 401, a network server 402, and a management server 403. The exchange 401 controls line connection between the communication terminals 100 and 200 via the base station 300. The network server 402 is a packet data exchange type (chat) communication server, and controls packet data exchange (chat) between the communication terminals 100 and 200 via the base station 300. The management server 403 manages the entire communication.

GPS (Global Positioning
System) satellite 500 is a geodetic satellite (NAVSTAR: currently 24 orbiting the earth) launched by the US Department of Defense, and transmits predetermined GPS radio waves (1.22760G / 1.57542 GHz) S2. The communication terminals 100 and 200 receive the GPS radio wave S2 from the GPS satellite 500 (which may be at least about 4 or less, but the accuracy decreases), and acquires position information (latitude / longitude).

  Next, FIG. 2 is a block diagram showing the configuration of the communication terminals 100 and 200 described above. In the figure, a wireless communication unit 600 performs wireless communication with a base station 300 through an antenna 601. The FM radio unit 602 transmits / receives music data and moving image data to / from the other communication terminal via the antenna 603 via FM radio. The GPS control unit 604 receives GPS radio waves S2 transmitted from at least about four of the GPS satellites 500 by the GPS antenna 605, calculates the phase of the radio waves (difference in reception timing), and determines whether the receiver and the artificial satellite By performing triangulation in between, position information consisting of latitude / longitude (altitude) information of the current position is acquired.

  The display unit 606 includes a liquid crystal display and displays various data. The operation unit 607 includes various function keys, a numeric keypad, and the like, and inputs operation instructions from the user. The ROM 608 stores various programs, operation parameters, and the like. The RAM 609 is used as a working area for the control unit 614 described later, and stores content data such as music data and moving image data. In particular, in the present embodiment, the RAM 609 stores phone book information consisting of the name and telephone number of the communication partner, and frequency or channel as FM frequency information when communicating with the partner communication terminal by FM radio. The number is stored. Details will be described later.

  The voice processing unit 610 encodes the voice signal from the microphone 611 in the voice call under the control of the control unit 614, decodes the voice data and outputs it from the speaker 612, and decodes the voice data of the content. And output from the speaker 613.

  The control unit 614 controls the operation of each unit according to the program stored in the ROM 608. In particular, in the present embodiment, in the communication terminal 100 on the transmission side, at the time of packet data exchange type (chat) communication, music data is reproduced in parallel with the chat operation, and at the other communication terminal. The music data is modulated and transmitted by FM radio. In addition, the communication terminal 200 on the receiving side demodulates and reproduces the music signal received by FM radio in parallel with the chat operation.

  Next, FIGS. 3A and 3B are conceptual diagrams showing a data configuration stored in the RAM 609. In the RAM 609, as shown in FIG. 3 (a), for a specific receiving-side communication terminal (plurality), telephone book information 6091 including the name of the user and the telephone number of the communication terminal used by the user, As shown in FIG. 3B, FM frequency information 6092 consisting of a frequency or a transmission / reception channel used when transmitting content data (music data in this embodiment) between the communication terminal and the communication terminal of the other party, Is remembered.

A-1. Operation of First Embodiment Next, the operation of the first embodiment described above will be described. Here, FIG. 4 and FIG. 5 are flowcharts for explaining the operation of the communication terminal 100 on the transmission side according to the first embodiment. In the communication terminal 100 on the transmission side, when the user performs a playlist display operation, first, the music data stored in the RAM 609 is read (step S10), and it is determined whether or not the music data playback operation has been detected. (Step S12). If no music data playback operation is detected, the process returns to a main routine (not shown).

  On the other hand, when a music data reproduction operation is detected, the read music data is reproduced by the audio processing unit 610 and output from the speaker 613 (step S14). When the music data is being reproduced, it is determined whether or not a submenu selection operation is detected (step S16). If no submenu selection operation is detected, the process returns to step S14, and the music data Continue playback.

  On the other hand, if a submenu selection operation is detected during music data playback, the submenu is displayed on the display unit 609 (step S18). Next, it is determined whether or not a chat selection operation has been detected from the submenu (step S20). If no chat selection operation is detected, the process proceeds to another selection process (step S22).

  On the other hand, when a chat selection operation is detected from the submenu, the names of a plurality of other parties stored in the phone book information 6091 in the RAM 609 are read out and displayed on the display unit 606 (step S24). It is determined whether or not the other party has been determined (step S26). The chat partner is selected by the cursor key of the operation unit 607 and is confirmed by the enter key. When the chat partner is determined, the communication terminal 200 on the receiving side is called via the wireless communication line (packet data communication) with the telephone number of the partner (step S28). Next, it is determined whether or not the other party has come out (step S30). If the other party has not come out, an error message is displayed (step S32), the process returns to step S14, and the reproduction of music data is continued.

  On the other hand, when receiving the chat call, the receiving communication terminal 200 activates its own GPS control unit 604, acquires its own position, and transmits the acquired position information to the transmitting communication terminal 100. The detailed operation of the receiving communication terminal 200 will be described later.

  In the communication terminal 100 on the transmission side, when the position information is transmitted from the communication terminal 200 on the reception side, the determination in step S34 becomes YES, activates its own GPS control unit 604, and acquires its own position information. Processing is executed (step S36). Next, according to the position information of the communication terminal 200 on the reception side and the position information of itself (the communication terminal 100 on the transmission side), the FM radio unit 602 determines whether or not music data can be transmitted by FM transmission ( Step S38).

  Then, it is determined whether or not the communication terminal 200 on the receiving side is within the transmittable distance (within a radius of about 10 m) of the music data (step S40). If it is within the transmittable distance, the FM frequency information 6092 is read from the RAM 609. Read (step S42), transmit the FM frequency information 6092 and control information (command data) for controlling the frequency to be matched with the FM frequency information 6092 by activating the FM radio unit to the receiving side communication terminal 200 (Step S44). Next, the FM radio unit 602 is activated, and the music data being reproduced is modulated and transmitted according to the FM frequency information 6092 (step S46). In the communication terminal 100 on the transmission side, the music data is continuously reproduced while the music data is being transmitted by the FM radio unit 602.

  Next, a chat process for transmitting / receiving character data to / from the communication terminal 200 on the receiving side is executed (step S54), it is determined whether or not the chat has ended (step S56), and if the chat has not ended. Returning to step S54, the chat is continued. On the other hand, when the chat is finished, the process is finished and the process returns to a predetermined main routine.

  If it is determined in step S40 that the communication terminal 200 on the receiving side is not within the transmittable distance, the music data being reproduced is divided into predetermined blocks (step S48) and inserted into the data packet ( In step S50), the data channel is used to transmit to the receiving communication terminal 200 (step S52). Thereafter, as described above, in step S54, a chat process for transmitting / receiving character data to / from the receiving communication terminal 200 is executed. When the chat is finished, the process is finished and the process returns to a predetermined main routine.

  Next, the operation of the communication terminal 200 on the receiving side according to the first embodiment will be described. Here, FIG. 6 is a flowchart for explaining the operation of the communication terminal 200 on the receiving side according to the first embodiment. The receiving side communication terminal 200 determines whether or not a chat call has been made in the standby state (step S60), and upon receiving the chat call, starts a connection for data exchange (step S62). Then, the GPS control unit 604 is activated to execute processing for acquiring own position information (step S64), and the acquired position information is transmitted to the communication terminal 100 on the transmission side (step S66).

  Next, it is determined whether or not FM frequency information 6092 from the communication terminal 100 on the transmission side and control information for activating the FM radio unit and controlling the frequency to match the FM frequency information 6092 are received (step). S68). If it is determined that it has been received, an activation instruction is given to the FM radio unit 602 based on the control information (step S70). Further, the FM radio unit 602 sets a reception channel according to FM frequency information 6092 from the communication terminal 100 on the transmission side and the control information, and receives and reproduces a music signal transmitted via the reception channel. Details of the FM radio unit 602 will be described later.

  Thereafter, the communication terminal 200 on the receiving side executes chat processing for transmitting / receiving character data to / from the communication terminal 100 on the transmitting side (step S82), and determines whether or not the chat has ended (step S84). If the chat has not ended, the process returns to step S82 to continue the chat. Since the FM radio unit 602 operates independently of the chat process, music data is reproduced even during a chat. On the other hand, when the chat is finished, the process is finished and the process returns to a predetermined main routine.

  On the other hand, if the FM frequency information 6092 is not received from the communication terminal 100 on the transmission side, it is determined whether or not music data is inserted in the data packet (step S72). If no music data is inserted in the data packet, the process proceeds to the chat process and subsequent steps in step S82 without reproducing the music data.

  On the other hand, when music data is inserted into the data packet, the divided music data is sequentially received (step S74), the divided music data is combined (step S76), and the combined music data is decoded. (Step S78) and reproduction (Step S80). Thereafter, as described above, in step S82, a chat process for transmitting / receiving character data to / from the communication terminal 100 on the transmission side is executed. Also in this case, the music data is reproduced in the communication terminal 200 on the receiving side during the chat. When the chat is finished, the process is finished and the process returns to a predetermined main routine.

  Next, the operation of the FM radio unit 602 in the receiving side communication terminal 200 will be described. FIG. 7 is a flowchart for explaining the operation of the FM radio unit in the communication terminal 200 on the receiving side according to the first embodiment. When activated by receiving the control information, the FM radio unit 602 first sets a reception channel according to the FM frequency information 6092 (step S90), and uses the reception channel to transmit the communication terminal 100 on the transmission side. Is received (step S92), the received music signal is demodulated (step S94), and the demodulated music signal is output to the audio processing unit 610 (step S96). Then, it is determined whether or not a reproduction end instruction has been detected (step S98). If no end instruction has been detected, the process returns to step S92 to continue reception, demodulation, and reproduction output of the music signal. If an instruction is detected, the process ends.

  According to the above-described first embodiment, while maintaining the transmission of characters such as voice calls and chats by the wireless communication system, the music data and the communication data are transmitted using the communication system using the FM frequency band different from the wireless communication system. Since content data such as moving image data is transmitted, it is possible to reliably enjoy the reproduction of the content data while performing a voice call or character transmission without causing an increase in wireless communication traffic.

  Further, according to the first embodiment, when a communication terminal on the transmission side transmits music data or video data in a communication system using the FM frequency band, the communication terminal on the reception side together with the frequency information stored in its communication terminal. Since the FM radio unit of the communication terminal is activated and the control information for controlling the frequency information to match the frequency information is transmitted, the communication terminal on the receiving side is transmitted without performing an operation of activating the FM radio unit. Content data can be reproduced.

  Furthermore, according to the first embodiment, the position information of the receiving communication terminal called by wireless communication is received, and the FM frequency band is used from the received position information and the position information of the calling communication terminal. Since it is determined whether or not the transmission is possible in the communication system, it is possible to reliably transmit the content data.

  Furthermore, according to the first embodiment, since the communication terminal on the transmission side can designate the communication terminal on the reception side when reproducing the content data, before performing a voice call or transmission of characters. It is possible to save the trouble of selecting data to be transmitted in advance.

  In addition, according to the first embodiment, the content data is transmitted by direct communication different from the system via the base station and the server, so that the cost for the transmission can be suppressed.

B. Second embodiment B-1. Configuration of Second Embodiment Next, a second embodiment of the present invention will be described.
FIG. 8 is a block diagram showing a configuration of a communication system according to the second embodiment. It should be noted that portions corresponding to those in FIG. In the second embodiment, the music data is transmitted using Bluetooth (trademark) communication (communication system using the 2.4 GHz frequency band) S4 instead of the FM radio wave used in the first embodiment. It is a feature.

  Next, FIG. 9 is a block diagram showing a configuration of the communication terminals 100 and 200 according to the second embodiment. It should be noted that parts corresponding to those in FIG. In the figure, a Bluetooth control unit 620 recognizes other communication terminals and performs data transmission / reception in accordance with the Bluetooth standard. In addition, as shown in FIG. 10, the RAM 609 identifies the name of the user, the telephone number of the communication terminal used by the user, and the terminal in Bluetooth for a specific receiving-side communication terminal (s). The connection information 6093 is stored which includes the identification information and the flag indicating whether or not the audio profile can be connected.

B-2. Operation of Second Embodiment Next, the operation of the second embodiment will be described.
FIG. 11 is a flowchart for explaining the operation of the communication terminal 100 on the transmission side according to the second embodiment. Note that the processing in steps S10 to S32 shown in FIG. 4 described in the first embodiment is the same. That is, in steps S10 to S32 shown in FIG. 4, after the music data reproduction is started in the communication terminal 100 on the transmitting side, a chat partner is determined, and a wireless communication line (packet data communication) is determined by the telephone number of the partner. When the communication terminal 200 on the receiving side is called through (data exchange call instead of voice call call) and the other party comes out, the process proceeds to the flowchart shown in FIG.

  In the communication terminal 100 on the transmission side, the Bluetooth control unit 620 is activated as a master (step S100), and the identification information of the communication terminal 200 on the reception side existing in the vicinity is searched (step S102). Then, it is determined whether or not the identification information has been detected (step S104). When the identification information from the communication terminal 200 on the receiving side is detected, the communication terminal 200 of the identification information supports the audio profile. It is determined whether or not there is (step S106).

  If the communication terminal 200 supports the audio profile, a link is established with the communication terminal 200 on the receiving side, and the music data being reproduced is encoded in real time and output to the Bluetooth control unit 620. (Step S108). The Bluetooth control unit 620 transmits the encoded music data to the communication terminal 200 on the receiving side.

  Next, a chat process for exchanging character data with the receiving side communication terminal 200 is executed (step S54), it is determined whether or not the chat has ended (step S116), and if the chat has not ended. Returning to step S116, the chat is continued. On the other hand, when the chat is finished, the process is finished and the process returns to a predetermined main routine.

  On the other hand, if the communication terminal 200 on the receiving side does not support the audio profile, the music data being played is divided into predetermined blocks (step S110), inserted into the data packet (step S112), and wireless communication is performed. Using the data channel by unit 600, the data is transmitted to communication terminal 200 on the receiving side (step S114). Thereafter, as described above, in step S116, a chat process for exchanging character data with the communication terminal 200 on the receiving side is executed. When the chat is finished, the process is finished and the process returns to a predetermined main routine.

  Next, the operation of the communication terminal 200 on the receiving side according to the second embodiment will be described. Here, FIG. 12 is a flowchart for explaining the operation of the receiving communication terminal 200 according to the second embodiment. The receiving side communication terminal 200 determines whether or not a chat call has been made in the standby state (step S130), and upon receiving the chat call, starts a connection for data exchange (step S132). The Bluetooth control unit 620 is activated as a slave (step S134), and its own identification information is transmitted to the communication terminal 100 on the transmission side (step S136).

  Next, it is determined whether or not music data has been received via the Bluetooth communication S4 from the communication terminal 100 on the transmission side (step S138). When the music data is received, the audio processing unit 610 decodes the music data (step S140) and reproduces the decoded music data (step S142). Thereafter, the communication terminal 200 on the receiving side executes chat processing for transmitting / receiving character data to / from the communication terminal 100 on the transmitting side (step S156), and determines whether or not the chat has ended (step S158). If the chat has not ended, the process returns to step S156 to continue the chat. Therefore, the music data is reproduced even during the chat. On the other hand, when the chat is finished, the process is finished and the process returns to a predetermined main routine.

  On the other hand, when music data is not received from the communication terminal 100 on the transmission side, it is determined whether or not music data is inserted in the data packet (step S144). If no music data is inserted in the data packet, the process proceeds to the chat process and subsequent steps in step S156 without reproducing the music data.

  On the other hand, if the music data is inserted in the data packet, the divided music data is received (step S146), and it is determined whether or not the reception of the music data has ended (step S148). If the reception is not finished, the process returns to step S146 to continue receiving music data. On the other hand, when the reception of the music data is finished, the divided music data is combined (step S150), and the combined music data is decoded by the audio processing unit 610 (step S152) and reproduced (step S154). . Thereafter, as described above, in step S156, chat processing for exchanging character data with the communication terminal 100 on the transmission side is executed. Also in this case, the music data is reproduced in the communication terminal 200 on the receiving side during the chat. When the chat is finished, the process is finished and the process returns to a predetermined main routine.

  According to the second embodiment described above, there is a communication terminal on the receiving side in the transmission communicable area before the transmission of content data even in a communication system that requests establishment of a link in advance such as Bluetooth. You can tell if you want to.

It is a block diagram which shows the structure of the communication system by 1st Embodiment of this invention. It is a block diagram which shows the structure of the communication terminals 100 and 200 by this 1st Embodiment. It is a conceptual diagram which shows the data structure (Phonebook information 6091, FM frequency information 6092) memorize | stored in RAM609. It is a flowchart for demonstrating operation | movement of the communication terminal 100 by the side of transmission by this 1st Embodiment. It is a flowchart for demonstrating operation | movement of the communication terminal 100 by the side of transmission by this 1st Embodiment. It is a flowchart for demonstrating operation | movement of the communication terminal 200 of the receiving side by this 1st Embodiment. It is a flowchart for demonstrating operation | movement of the FM radio | wireless part in the communication terminal 200 of the receiving side by this 1st Embodiment. It is a block diagram which shows the structure of the communication system by 2nd Embodiment of this invention. It is a block diagram which shows the structure of the communication terminals 100 and 200 by this 2nd Embodiment. 3 is a conceptual diagram showing a data configuration (connection information 6093) stored in a RAM 609. FIG. It is a flowchart for demonstrating operation | movement of the communication terminal 100 of the transmission side by this 2nd Embodiment. It is a flowchart for demonstrating operation | movement of the communication terminal 200 of the receiving side by this 2nd Embodiment.

Explanation of symbols

100, 200 Communication terminal 300 Base station 400 Communication service system 401 Switch 402 Network server 403 Management server 600 Wireless communication unit 601 Antenna 602 FM radio unit 603 Antenna 604 GPS control unit 605 GPS antenna 606 Display unit 607 Operation unit 608 ROM
609 RAM
6091 Phonebook information 6092 FM frequency information 610 Audio processing unit 611 Microphone 612 Speaker 613 Speaker 614 Control unit 620 Bluetooth control unit 621 Antenna 6093 Connection information S1 Wireless communication S2 GPS radio wave S3 FM radio wave
S4 Bluetooth communication

Claims (7)

Storage means for storing data;
Designation means for designating a terminal for reproducing the data stored in the storage means;
Calling means for calling the terminal designated by the designation means using the first communication system;
Judgment whether or not the communication terminal and the designated terminal can transmit the data using the second communication system based on a response from the designated terminal to the calling by the calling means. Means,
If it is determined by the determination means that the data can be transmitted, information for specifying the communication terminal in the second communication system is transmitted to the designated terminal using the first communication system. Communication control means for controlling the specified terminal to receive data using the second communication system based on information for specifying the communication terminal;
When it is determined by the determination means that the data can be transmitted, the data is read from the storage means, and the designation is made using the second communication system in a state where communication by the first communication system is held. And a control means for controlling to transmit the data to the terminal. The response from the designated terminal to the call by the calling means includes position information of the designated terminal, and further includes position information storage means for storing the position information of the communication terminal,
Whether the determination means can transmit the data using the second communication system based on the position information of the designated terminal and the position information of the communication terminal stored in the position information storage means. The communication terminal according to claim 1 , wherein it is determined whether or not. Further comprising identification information storage means for storing identification information for specifying the designated terminal in the second communication system,
The determination means is an identification stored in the identification information storage means within a range in which communication using the second communication system is possible based on a response from the designated terminal to the call by the calling means. It is determined whether or not the data transmission is possible between the communication terminal and the specified terminal by determining whether or not the specified terminal specified by the information exists. The communication terminal according to claim 1 . Replaying means for replaying data stored in the storage means;
The designation means designates a terminal for reproducing the data when the data is reproduced by the reproduction means,
Said control means, while maintaining the reproduction of data by the reproducing means, any one of claims 1 to 3, wherein the transmitting the data to the designated terminal using the second communication system The communication terminal described in 1. The first communication system is a communication system via a relay system on a communication line;
The communication terminal according to any one of claims 1 to 4 , wherein the second communication system is direct communication with the designated terminal. The control means transmits / receives the data by communication in the first communication system when the determination means determines that transmission of the data using the second communication system is impossible. communication terminal according to any one of claims 1 to 5, characterized in that the switching control so. Computer
Designating means for designating a terminal for reproducing data stored in advance in the storage unit;
Calling means for calling the terminal designated by the designation means using the first communication system;
Judgment whether or not the communication terminal and the designated terminal can transmit the data using the second communication system based on a response from the designated terminal to the calling by the calling means. Means,
If it is determined by the determination means that the data can be transmitted, information for specifying the communication terminal in the second communication system is transmitted to the designated terminal using the first communication system. Communication control means for controlling the specified terminal to receive data using the second communication system based on information for specifying the communication terminal;
When it is determined by the determination means that the data can be transmitted, the data is read from the storage means, and the designation is made using the second communication system in a state where communication by the first communication system is held. Control means for controlling the data to be transmitted to the terminal,
A communication control program characterized by causing it to function as

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