JP4991218B2 - Mobile communication terminal and mail receiving program - Google Patents

Description

  The present invention relates to a mobile communication terminal and a mail receiving program.

  A wireless communication system for a cellular phone is a general-purpose system (for example, CDMA2000, hereinafter referred to as a voice communication channel) mainly used for voice communication and rarely used for data communication, and data mainly used for data communication. There is a communication dedicated system (for example, EVDO, hereinafter, data communication path). The mail transmission / reception function of a mobile phone transmits / receives mail via a mail server connected to a wireless communication system.

  The mobile phone operates as follows when receiving a mail. First, when a new mail arrives at the mail server, the mail server transmits a new arrival notification to the mobile phone using the voice communication path. The mobile phone that has received the new arrival notification transmits an incoming notification of the new arrival notification to the mail server using the voice communication path. Next, the cellular phone performs connection processing of the data communication path, and transmits a mail request to the mail server using the data communication path after connection.

  At this time, if the data communication path cannot be connected for some reason, the voice communication path is connected, and after the connection, the mail request is transmitted to the mail server using the voice communication path. The mail server that has received the mail request transmits the mail using the communication path (data communication path or voice communication path) used for transmitting the mail request. Further, when the mail server does not receive a receipt notification or a mail request from the mobile phone within a certain period, the mail server transmits a new arrival notification to the mobile phone again using the voice communication path.

  By the way, at the time of a disaster or at the end of the year and the beginning of the year, communication congestion is expected, so communication restrictions may be imposed on the communication path. In communication restrictions, the degree of restriction is expressed by the restriction rate. However, even if communication restrictions are applied to voice communication paths, communication restrictions may not be applied to data communication paths that allow higher capacity communication. In some cases, only communication restrictions with a lower restriction rate than the voice communication path can be applied.

  In view of this, a technique has been proposed in which optimal regulation adapted to traffic characteristics is performed when calling and location registration are regulated according to communication traffic (for example, see Patent Document 1). In the related art, when communication restriction is imposed, the mobile phone that has received the new arrival notification operates as follows. First, the mobile phone acquires and stores the restriction rate before sending the receipt notification of the new arrival notification using the voice communication path.

  Then, a random number is generated, and the random number is compared with the regulation rate. When the random number is larger than the regulation rate, a receipt notification is transmitted, and when the random number is small, it is not transmitted. When not transmitting, a random number is generated again, and the random number is compared with the regulation rate. If the random number is larger than the regulation rate, a receipt notification is transmitted, and if not, it is not transmitted. This operation is repeated until transmission is executed or until a predetermined time elapses. In other words, when communication is restricted, the mobile phone repeats “random number generation, comparison between random number and restriction rate” when sending a receipt notification.

JP-A-4-373325

  However, in the above prior art, when communication restriction is applied to the voice communication channel, the mobile phone that has received the new arrival notification repeats “random number generation, comparison of random number and restriction rate” as described above. There has been a problem that an e-mail request that should be made after sending the notification cannot be sent, and as a result, the e-mail cannot be received. Further, the above-described prior art has a problem that power consumption increases by repeating “random number generation, comparison between random number and regulation rate”.

  On the other hand, since the mail server does not receive the receipt notification or the mail request, the new mail notification is transmitted again after a certain period of time, and as a result, there is a problem in that it imposes a burden on the voice communication path subject to communication restrictions. there were.

  Furthermore, when communication restrictions are placed on the voice communication path, it is possible that a new arrival notification is not sent from the voice communication path, so that the mobile phone knows that new mail has arrived at the mail server. There was a problem that it was not possible to receive e-mail.

  Therefore, an object of the present invention is to provide a mobile communication terminal and a mail receiving program that can receive mail addressed to themselves at an appropriate timing even when the communication path is restricted.

To achieve the above object, the invention described in claim 1 is a portable communication terminal connected to a mail server via a communication network having a plurality of communication paths and receiving mail from the mail server, wherein the communication network A mail confirmation unit for inquiring whether or not a mail addressed to the mail server has arrived at the mail server, a restriction state detection unit for detecting a communication restriction state of the plurality of communication paths, and the restriction state detection unit When it is detected that any one of the plurality of communication paths is subjected to communication restriction, using another communication path different from the communication path, every predetermined time elapses, wherein controlling the mail confirming means to make an inquiry, if there is the inquiry instruction by user operation, and acquires the remaining time until the predetermined time period elapses, the remaining time is a predetermined threshold value If the inner, performs the query, the mobile communication terminal the remaining time is equal to or greater than a predetermined threshold value, characterized by comprising control means for controlling said mail confirming means to limit the query It is .

As a preferred aspect, for example, as in claim 2 , in the mobile communication terminal according to claim 1 , the predetermined time may be a fixed time stored in advance.

As a preferred aspect, for example, as in claim 3, in the mobile communication terminal according to claim 1, the restriction status detection means further detects a restriction rate indicating a degree of communication restriction, and the predetermined time is The time according to the detected regulation rate may be sufficient.

As a preferred embodiment, for example, as in claim 4 , in the mobile communication terminal according to any one of claims 1 to 3 , the mail confirmation unit provides a new arrival notification informing that the mail addressed to itself has arrived. When receiving from the mail server, it has a receipt notification sending means for sending to the mail server a receipt notification informing the mail server that the new arrival notification has been received, and the control means The mail confirmation unit may be controlled so as to omit transmission.

As a preferred mode, for example, as in claim 5, in the mobile communication terminal according to any one of claims 1 to 4, whether or not reception of the mail addressed to itself transmitted from the mail server has failed And determining means for limiting the inquiry for at least a predetermined time if communication restriction is performed when the determination means determines that reception of mail has failed. The mail checking means is controlled.
As a preferred aspect, for example, as in claim 6, in the mobile communication terminal according to claim 5, the control means determines that the inquiry is made when the determination means determines that the mail has been successfully received. The mail checking means is controlled so as not to restrict the above.
In order to achieve the above object, the invention according to claim 7 is a mail receiving program for receiving mail from the mail server by a mobile communication terminal connected to the mail server via a communication network having a plurality of communication paths. A mail confirmation function for inquiring whether or not mail addressed to the mail server has arrived at the mail server via the communication network, and a restriction status for detecting a communication restriction status of the plurality of communication paths. When it is detected that any one of the plurality of communication paths is restricted by the detection function, a communication path different from the communication path is used for every elapse of a predetermined time. , Controlling the mail confirmation function to make the inquiry, and when there is an inquiry instruction by a user operation, obtain a remaining time until the predetermined time elapses, If the inquiry time is within a predetermined threshold, the inquiry is performed, and if the remaining time is equal to or greater than the predetermined threshold, a control function for controlling the mail confirmation unit to limit the inquiry is realized. Is a mail receiving program.

Further, as a preferred aspect, for example, as in claim 8, in the mail reception program according to claim 7, a determination function for determining whether or not reception of mail addressed to itself transmitted from the mail server has failed. Further, the control function controls the mail confirmation function to limit the inquiry at least for a predetermined time if communication restriction is performed when it is determined that the reception of the mail has failed. You may do it.

  According to the present invention, there is an advantage that mail addressed to itself can be received at an appropriate timing even if the communication path is restricted.

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

A. Configuration of Embodiment FIG. 1 is a block diagram showing a system configuration of a mobile communication terminal according to an embodiment of the present invention. In the figure, the mobile communication terminal 1 is composed of, for example, a mobile phone having at least two communication means (such as CDMA2000 and EVDO). The mobile communication terminal 1 is connected to the exchanges 4 and 5 through the base stations 2 and 3, and through the exchange, at least two communication paths, that is, the first communication path (CDMA2000 communication path) and the first communication path. The mail server 7 is connected to the mail server 7 through the portable wireless network 6 having two communication paths (EVDO communication paths), and mail is transmitted to and received from the mail server 7.

  In addition, when the mobile communication terminal 1 makes a new mail inquiry in accordance with a user operation, the mobile communication terminal 1 detects the communication restriction status of the two communication paths, and detects that one of the communication paths is under outgoing restriction, the other communication The mail server 7 is periodically inquired of new mail using a route (relaxed or not regulated).

  Next, FIG. 2 is a block diagram showing a configuration of the mobile communication terminal 1 according to the present embodiment. In the figure, a mobile communication terminal 1 includes a mobile phone wireless transmission / reception unit 1-1, an audio signal processing unit 1-2, an operation unit 1-3, a display unit 1-4, an RTC 1-5, a ROM 1-6, and a RAM 1-7. And a central control unit 1-8. The mobile phone wireless transmission / reception unit 1-1 has at least two communication means (such as CDMA2000 and EVDO), which are connected to the exchanges 4 and 5 via the base stations 2 and 3, respectively, and via the mobile wireless network 6. The mail is transmitted to and received from the mail server 7.

  The audio signal processing unit 1-2 takes in audio from the microphone, converts it into a digital signal and supplies it to the central control unit 1-8, while converting the audio signal into an analog signal and outputs it from the speaker. The operation unit 1-3 inputs various data, operation instructions, and the like. The display unit 1-4 includes a liquid crystal display and displays various messages and images.

  The RTC 1-5 measures real time. The ROM 1-6 stores predetermined programs and various parameters. The RAM 1-7 stores various data. In particular, in the present embodiment, the RAM 1-7 includes a restriction rate storage unit 1-7-1, a restriction flag storage unit 1-7-2, a new mail check prohibition timer time storage unit 1-7-3, and a condition storage unit 1. -7-4 and a mail storage unit 1-7-5.

  The restriction rate storage unit 1-7-1 stores the restriction rate of the communication path. The restriction flag storage unit 1-7-2 stores a restriction flag that is turned off when the first communication path is not restricted and turned on when the restriction is restricted. The restriction flag is used to control activation / cancellation of a new mail check prohibition timer. The new mail check prohibition timer time storage unit 1-7-3 stores a time to be set in the new mail check prohibition timer (hereinafter, new mail check prohibition timer time). The condition storage unit 1-7-4 stores conditions for determining a new mail check prohibition timer time and conditions for determining a new mail check permission time period by a user operation. The mail storage unit 1-7-5 stores the received mail. The central control unit 1-8 controls each unit according to a predetermined program stored in the ROM 1-6 described above.

  FIG. 3 is a conceptual diagram illustrating an example of conditions stored in the condition storage unit 1-7-4. As shown in the figure, the new mail check prohibition timer time is regulated rate (1 to 100) × 0.1 minutes, that is, 0.1 minute to 10 minutes depending on the regulation rate of the first communication path. The condition is set. In addition, the permitted time zone for confirming new mail by user operation is set so that new mail confirmation by user operation is permitted when the remaining time of the new mail confirmation prohibition timer is less than 10% of the timer time.

  The new mail check prohibition timer time is not a value corresponding to the restriction rate but may be a fixed value such as 10 minutes, for example, in order to simplify the control. Further, for the same reason, the permission time zone may be a fixed value such as a remaining timer time of 3 minutes instead of a value corresponding to the restriction rate.

B. Operation of Embodiment Next, the operation of the above-described embodiment will be described. Here, FIG. 4 is a flowchart (main routine) for explaining the operation of the mobile communication terminal 1 according to the present embodiment. First, it is determined whether or not a power-on operation has been performed (step S10), and when there is a power-on operation, standby processing is executed (step S12). When in the standby state, it is determined whether or not there is an incoming call (step S14), and if there is an incoming call, the incoming call is made (step S16). When the call ends, the process returns to step S14.

  On the other hand, if there is no incoming call, it is determined whether or not the restriction information on the first communication path has been received (step S18). When the restriction information on the first communication path is received, a restriction flag process described later is executed to turn on / off the restriction flag depending on whether or not the first communication path is restricted (step S20). Thereafter, a new mail check prohibition timer starting process, which will be described later, is executed to control the start / release of the new mail check prohibit timer according to the on / off state of the restriction flag (step S22). Then, the process returns to step S14.

  On the other hand, if the restriction information on the first communication path has not been received, it is determined whether the new mail check prohibition timer has timed out (step S24). Then, when the new mail check prohibition timer has timed out, a new mail check & reception process (to be described later) for checking and receiving new mail via the first or second communication path is executed (step S26). Thereafter, a new mail check prohibition timer starting process, which will be described later, is executed to control the start / release of the new mail check prohibit timer according to the on / off state of the restriction flag (step S28). Then, the process returns to step S14.

  If the new mail confirmation prohibition timer has not timed out, it is determined whether or not a new arrival notification has been received (step S30). If a new arrival notification has been received, a message indicating that there is a new mail is displayed ( Step S32), a mail receiving process (to be described later) for receiving new mail via the first or second communication path is executed (step S34), and then a new mail check prohibition timer starting process to be described later is executed (step S34). S36). Then, the process returns to step S14.

  If a new arrival notification has not been received, it is determined whether or not a new mail check operation has been performed (step S38). If a new mail check operation has been performed, the remaining time of the new mail check prohibition timer is 10 times. It is determined whether it is less than% (step S40). If the remaining time of the new mail check prohibition timer is less than 10%, a new mail check & reception process described later is executed (step S42), and then a new mail check prohibit timer start process described later is executed. (Step S44). Then, the process returns to step S14. On the other hand, if the remaining time of the new mail check prohibition timer is not less than 10%, a message indicating that the outgoing call is restricted is displayed (step S46), and then the process returns to step S14.

  If there is no new mail confirmation operation, it is determined whether or not there is a power off operation (step S48). If there is a power off operation, the mobile communication terminal 1 is turned off (step S48). S50), the process ends.

  If there is no power-off operation, it is determined whether or not there is another operation (step S52). If there is another operation, processing is executed according to the operation (step S54). Thereafter, the process returns to step S14, and if there is no other operation, the process returns to step S14 as it is.

  Next, FIG. 5 is a flowchart for explaining the above-described restriction flag process. First, the restriction rate of the first communication channel is acquired (step S60), and it is determined whether or not the restriction rate of the first communication channel is 0% (step S62). When the restriction rate of the first communication path is 0%, that is, when it is not restricted, the restriction flag is turned off (step S64), and the process returns to the main routine described above.

  On the other hand, if the restriction rate of the first communication channel is not 0%, that is, if it is restricted, the restriction flag is turned on (step S66), and the new mail check prohibition timer time corresponding to the restriction rate is stored ( In step S68, it is determined whether the new mail check prohibition timer is running (step S70). If the new mail check prohibition timer is running, the process returns to the main routine described above. On the other hand, if the new mail check prohibition timer is not running, the process proceeds to a new mail check & reception process described later.

  Here, a modified example of the restriction flag process described above will be described. FIG. 6 is a flowchart for explaining a modified example of the restriction flag processing described above. First, the restriction rate of the first communication path is acquired (step S60a), and it is determined whether or not the restriction rate of the first communication path is 0% (step S62a). When the restriction rate of the first communication path is 0%, that is, when it is not restricted, the restriction flag is turned off (step S64a), and the process returns to the main routine described above. On the other hand, if the restriction rate of the first communication channel is not 0%, that is, if it is restricted, the restriction flag is turned on (step S66a), and the new mail check prohibition timer time corresponding to the restriction rate is stored ( Step S68a) returns to the main routine described above. As described above, in the modified example of the restriction flag process, in order to prevent the congestion of the second communication path immediately after being restricted, the process is not changed to the confirmation process for new mail.

  Next, FIG. 7 is a flowchart for explaining the above-described new mail check prohibition timer activation process. First, it is determined whether or not the restriction flag is on (step S80). If the restriction flag is on, the stored new mail check prohibition timer time is read (step S82) and the new mail check is performed. The prohibit timer is started (step S84), and the process returns to the main routine described above. On the other hand, if the restriction flag is not on, the new mail check prohibition timer is canceled (step S86), and the process returns to the main routine described above.

  Next, FIGS. 8 and 9 are flowcharts for explaining the above-described new mail confirmation & mail reception process. First, the mail reception timer is activated (step S90), and the restriction rate of the second communication path is acquired (step S92). Next, it is determined whether or not the restriction rate of the second communication path is less than 100% (step S94), and when the restriction rate of the second communication path is less than 100%, the second described later. Is established (step S96), and it is determined whether or not the connection is successful (step S98).

  If the connection with the second communication path is successful, a new mail check process using the second communication path (to be described later) is executed (step S100), and the confirmation of the mail via the second communication path is successful. It is determined whether or not (step S102). Then, if the confirmation of the mail through the second communication path is successful, it is determined whether there is a new mail (step S104). If there is a new mail, the second communication path described later is used. A mail receiving process is executed (step S106), and it is determined whether or not the mail has been successfully received through the second communication path (step S108). When the mail is successfully received through the second communication path, the process returns to the main routine described above. On the other hand, when the reception of the mail via the second communication path has failed, a message indicating that the reception of the mail has failed is displayed (step S114), and the process returns to the main routine described above.

  On the other hand, if there is no new mail, a message indicating that there is no new mail is displayed (step S110), and the process returns to the main routine described above.

  In addition, when the restriction rate of the second communication path is not less than 100%, when connection with the second communication path fails, or when confirmation of new mail via the second communication path fails, a mail is received. It is determined whether or not the timer has timed out (step S112). If the timer has timed out, a message indicating that the reception of the mail has failed is displayed (step S114), and the process returns to the main routine described above.

  On the other hand, if the mail reception timer has not timed out, the restriction rate of the first communication path is acquired (step S116), and it is determined whether or not the restriction rate of the first communication path is less than 100%. (Step S118) When the restriction rate of the first communication path is less than 100%, connection establishment by the first communication path described later is executed (Step S120), and it is determined whether or not the connection is successful. (Step S122).

  If the connection with the first communication path is successful, a new mail check process using the first communication path described later is executed (step S124), and it is determined whether or not the mail check is successful (step S124). Step S126). If the confirmation of the mail through the first communication path is successful, it is determined whether or not there is a new mail (step S128). If there is no new mail, a message indicating that there is no new mail is displayed ( Step S130) returns to the main routine described above.

  On the other hand, if there is a new mail, a mail reception process through a first communication path, which will be described later, is executed (step S132), and it is determined whether or not the mail has been successfully received through the first communication path (step S132). S134). If the mail is successfully received through the first communication path, the process returns to the main routine described above.

  In addition, when the connection with the first communication path fails, when the confirmation of mail via the first communication path fails, or when the reception of new mail via the first communication path fails, The restriction rate of the first communication path is acquired (step S136), it is determined whether or not the restriction ratio of the first communication path is 0% (step S138), and the restriction ratio of the first communication path is 0%. If this is the case, that is, if it is not regulated, the regulation flag is turned off (step S140), the fact that the mail reception has failed is displayed (step S146), and the process returns to the main routine described above.

  On the other hand, if the restriction rate of the first communication path is not 0%, that is, if it is restricted, the restriction flag is turned on (step S142), and the new mail check prohibition timer time corresponding to the restriction rate is stored ( Step S144) displays that the mail reception has failed (step S146), and returns to the main routine described above.

  If the restriction rate of the first communication path is not less than 100% in step S118, the restriction flag is turned on (step S148), and the new mail check prohibition timer time corresponding to the restriction rate is stored ( Step S150) displays that the call is restricted (step S152) and returns to the main routine described above.

  Next, FIGS. 10 and 11 are flowcharts for explaining the above-described mail receiving process. First, it is determined whether or not the restriction flag is off (step S160). If the restriction flag is off, a response process using a first communication path to be described later is executed (step S162). On the other hand, when the restriction flag is not off, the response process by the first communication path is not executed.

  Next, in any case, the mail reception timer is started (step S164), the restriction rate of the second communication path is acquired (step S166), and is the restriction rate of the second communication path less than 100%? It is determined whether or not (step S168). If the restriction rate of the second communication path is less than 100%, connection establishment by the second communication path to be described later is executed (step S170), and it is determined whether or not the connection is successful (step S170). S172).

  If the connection with the second communication path is successful, a mail reception process through the second communication path described later is executed (step S174), and whether or not the mail has been successfully received through the second communication path. Is determined (step S176). When the mail is successfully received through the second communication path, the process returns to the main routine described above. When the mail reception through the second communication path is unsuccessful, a message indicating that the reception has failed is displayed ( In step S180), the process returns to the main routine described above.

  On the other hand, if the restriction rate of the second communication path is not less than 100%, or if the connection via the second communication path fails, it is determined whether or not the mail reception timer has timed out (step S178). If the reception timer has timed out, a message indicating that the reception has failed is displayed (step S180), and the process returns to the main routine described above.

  If the mail reception timer has not timed out, the restriction rate of the first communication path is acquired (step S182), and it is determined whether or not the restriction ratio of the first communication path is less than 100%. (Step S184). If the restriction rate of the first communication path is less than 100%, connection establishment by the first communication path described later is executed (step S186), and it is determined whether or not the connection is successful (step S186). S188). If the connection with the first communication path is successful, a mail reception process through the first communication path, which will be described later, is executed (step S190), and it is determined whether the mail reception is successful (step S190). S192). If the mail is successfully received, the process returns to the main routine described above.

  On the other hand, when the connection with the first communication path fails or when the reception of the mail via the first communication path fails, the restriction rate of the first communication path is acquired again (step S194), It is determined whether or not the restriction rate of the first communication path is 0% (step S196). When the restriction rate of the first communication channel is 0%, that is, when it is not restricted, the restriction flag is turned off (step S198), and then a reception failure is displayed (step S204). Return to the main routine described above.

  If the restriction rate of the first communication path is not 0%, that is, if it is restricted, the restriction flag is turned on (step S200), and the new mail check prohibition timer time corresponding to the restriction rate is stored ( Step S202) displays that the reception has failed (step S204), and returns to the main routine described above.

  In step S184, if the restriction rate of the first communication path is not less than 100%, that is, if it is restricted, the restriction flag is turned on (step S206), and a new mail check prohibition timer corresponding to the restriction rate is set. The time is stored (step S208), a message indicating that the call is restricted (step S210), and the process returns to the main routine described above.

  Next, FIG. 12 is a flowchart for explaining the response process by the first communication path described above. First, the restriction rate of the first communication path is acquired (step S220), and it is determined whether or not the restriction rate of the first communication path is less than 100% (step S222). When the restriction rate of the first communication path is less than 100%, it is determined whether or not the restriction ratio of the first communication path is 0% (step S224), and the restriction rate is 0%. If there is, that is, if it is not regulated, the regulation flag is turned off (step S226). On the other hand, if the restriction rate of the first communication path is not 0%, that is, if it is restricted, the restriction flag is turned on (step S228), and the new mail check prohibition timer time corresponding to the restriction rate is stored ( Step S230).

  Next, a random number (1 to 100) is generated (step S232), and it is determined whether or not the generated random number is larger than the regulation rate (step S234). If the random number is not larger than the regulation rate, it is constant. Wait for a time (step S236), return to step S232, and generate a random number again. If the random number is larger than the regulation rate, a new arrival notification receipt notification is transmitted to the mail server 7 via the first communication path (step S238). Next, reception of a reception response via the first communication path is waited (step S240), and it is determined whether a reception response has been received from the base station (step S242). If no reception response is received from the base station, the process returns to step S232 and the above-described processing is repeated. When a reception response is received from the base station, the process returns to the mail reception process described above.

  On the other hand, if the restriction rate of the first communication path is not less than 100% in step S222, that is, if it is restricted, the restriction flag is turned on (step S244), and a new mail check prohibition timer corresponding to the restriction rate is set. The time is stored (step S246), and the process returns to the mail receiving process described above.

  From here, next, FIG. 13 is a flowchart for explaining the above-described connection establishment processing by the first communication path. First, it is determined whether or not the restriction rate of the first communication path is 0% (step S250). When the restriction rate of the first communication path is 0%, that is, when it is not restricted, the restriction flag is turned off (step S252), while the restriction rate of the first communication path is not 0%. If it is restricted, that is, if it is restricted, the restriction flag is turned on (step S254), and the new mail check prohibition timer time corresponding to the restriction rate is stored (step S256).

  Next, a random number (1 to 100) is generated (step S258), and it is determined whether or not the generated random number is larger than the regulation rate (step S260). If the random number is not larger than the regulation rate, it is constant. Wait for a time (step S262), return to step S258, and generate a random number again. When the random number is larger than the regulation rate, a connection request is transmitted to the base station via the first communication path (step S264). Next, it waits for reception of a reception response via the first communication path (step S266), and determines whether or not a reception response has been received from the base station (step S268).

  When a reception response is received from the base station, a connection is established through the first communication path (step S270), and the process returns to the above-described new mail confirmation & mail reception process or mail reception process. On the other hand, if the reception response is not received from the base station, it is determined whether or not the mail reception timer has timed out (step S272), and if it has not timed out, the process returns to step S258, and the above processing is repeated. When the timeout has occurred, the process returns to the above-described new mail confirmation & mail reception process or mail reception process.

  Next, FIG. 14 is a flowchart for explaining the connection establishment process through the second communication path described above. First, a random number (1 to 100) is generated (step S280), and it is determined whether or not the generated random number is larger than the regulation rate (step S282). It waits (step S284), returns to step S280, and generates a random number again. If the random number is larger than the regulation rate, a connection request is transmitted to the base station via the second communication path (step S286). Next, it waits for reception of a reception response via the second communication path (step S288), and determines whether a reception response has been received from the base station (step S290).

  When a reception response is received from the base station, a connection is established through the second communication path (step S292), and the process returns to the above-described new mail confirmation & mail reception process or mail reception process. On the other hand, if the reception response is not received from the base station, it is determined whether or not the mail reception timer has timed out (step S294). If not, the process returns to step S280, and the above processing is repeated. When the timeout has occurred, the process returns to the above-described new mail confirmation & mail reception process or mail reception process.

  Next, FIG. 15 is a flowchart for explaining the new mail check process through the first communication path described above. First, a new mail confirmation is transmitted to the mail server 7 via the first communication path (step S300), and reception of a new mail reply is awaited (step S302). Next, it is determined whether or not a new mail reply has been received from the mail server 7 (step S304). If a new mail reply has been received, the process returns to the new mail confirmation & mail reception process described above. On the other hand, if a new mail reply is not received, it is determined whether or not the mail reception timer has timed out (step S306). If not, the process returns to step S302 to wait for a new mail reply to be received. If time-out occurs, the process returns to the new mail confirmation & mail reception process described above.

  In addition, since the new mail confirmation process by the 2nd communication path becomes the same operation | movement, description is abbreviate | omitted.

  Next, FIG. 16 is a flowchart for explaining the mail receiving process through the first communication path described above. First, a mail request is transmitted to the mail server 7 through the first communication path (step S310), and reception of mail is awaited (step S312). Next, it is determined whether or not a mail has been received (step S314). When a mail is received from the mail server 7, the received mail is stored (step S316), and the above-described new mail confirmation & mail reception process is performed. Or return to the mail reception process. On the other hand, if the mail has not been received, it is determined whether or not the mail reception timer has timed out (step S318). If the mail has not timed out, the process returns to step S312 to wait for mail reception and timed out. In this case, the process returns to the above-described new mail confirmation & mail reception process or mail reception process.

  In addition, since the mail reception process by a 2nd communication path becomes the same operation | movement, description is abbreviate | omitted.

  According to the above-described embodiment, when detecting the communication restriction status of the communication path and detecting that any one communication path is restricted, using another communication path different from the communication path, Since the mail server is inquired whether the mail addressed to itself has arrived, it can be confirmed at the appropriate time whether new mail has arrived at the mail server, and the power consumption of the mobile communication terminal can be reduced. Can be suppressed. Furthermore, it is possible to prevent a load from being imposed on a communication path that is restricted in communication.

  In addition, since it is periodically inquired whether new mail has arrived at the mail server, it can be confirmed at an appropriate timing whether new mail has arrived at the mail server.

  In addition, when it is detected that the communication path is restricted, new mail arrives at the mail server immediately after detection of communication restriction because it is inquired whether new mail has arrived at the mail server. It can be confirmed whether or not.

  In addition, since the inquiry is made after a predetermined time has elapsed since it was detected that the communication path is restricted, many mobile communication terminals that detected the communication restriction make inquiries at the same time. Thus, it is possible to prevent a load from being applied to a communication path that is not regulated.

  Furthermore, when there is an inquiry instruction by a user operation, the remaining time after a predetermined time is acquired, and if the remaining time is small, the inquiry is performed, and if the remaining time is large, the inquiry is limited. It is possible to prevent the communication network from being overloaded.

  In addition, the mobile communication terminal can be easily controlled by setting the inquiry interval to a fixed time stored in advance. Further, since the restriction rate indicating the degree of communication restriction is further detected and the inquiry interval is set to the time according to the detected restriction rate, appropriate control according to the restriction rate can be performed.

  Also, when a new arrival notification is received from the mail server informing that the mail addressed to you has arrived, sending the receipt notification to the mail server to notify the mail server that the new arrival notification has been received is omitted. Therefore, by preventing unnecessary repetition of the receipt notification transmission operation at the terminal, the power consumption of the mobile communication terminal can be suppressed, and a transition to the subsequent operation, such as a mail reception operation, can be made immediately. Furthermore, it is possible to prevent a load from being imposed on a communication path that is restricted in communication.

  In addition, when the communication restriction status of the communication network is detected, and it is detected that the communication network is restricted, the inquiry about whether or not the mail addressed to the mail server has arrived is restricted at least for a predetermined time. Therefore, the power consumption of the portable communication terminal can be suppressed by preventing unnecessary repetition of the inquiry operation at the terminal by using the communication network in which communication is restricted. Furthermore, it is possible to prevent a load from being imposed on a communication network in which communication is restricted.

  Also, determine whether or not the mail addressed to you sent from the mail server has failed. If the mail reception fails, inquire whether the mail addressed to you has arrived at the mail server. Since it has been limited at least for a predetermined time, it prevents power consumption of the mobile communication terminal by preventing unnecessary operations on the terminal by using a communication network that is estimated to have some problem. Can do. Furthermore, it is possible to prevent a load on the communication network.

  In addition, the restriction on the inquiry is canceled when the mail is successfully received, so in the communication network that is assumed to be in a normal state, whether or not a new mail has arrived at the mail server is determined at an appropriate timing. Can be confirmed.

It is a block diagram which shows the system configuration | structure which consists of a mobile communication terminal by embodiment of this invention. It is a block diagram which shows the structure of the portable communication terminal 1 by this embodiment. It is a conceptual diagram which shows an example of the conditions stored in the condition storage part 1-7-4. It is a flowchart (main routine) for demonstrating operation | movement of the mobile communication terminal 1 by this embodiment. It is a flowchart for demonstrating a restriction | limiting flag process. It is a flowchart for demonstrating the modification of a restriction | limiting flag process. It is a flow chart for explaining new mail check prohibition timer starting processing. It is a flow chart for explaining new mail check & mail reception processing. It is a flow chart for explaining new mail check & mail reception processing. It is a flowchart for demonstrating mail reception processing. It is a flowchart for demonstrating mail reception processing. It is a flowchart for demonstrating the response process by a 1st communication path. It is a flowchart for demonstrating the connection establishment process by a 1st communication path. It is a flowchart for demonstrating the connection establishment process by a 2nd communication path. It is a flowchart for demonstrating the new arrival mail confirmation process by a 1st communication path. It is a flowchart for demonstrating the mail reception process by a 1st communication path.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile communication terminal 2 Base station 3 Base station 4 Exchanger 5 Exchanger 6 Portable wireless network 7 Mail server 1-1 Radio | wireless transmitter / receiver for mobile phones 1-2 Audio | voice signal processing part 1-3 Operation part 1-4 Display part 1-5 RTC
1-6 ROM
1-7 RAM
1-7-1 Restriction rate storage unit 1-7-2 Restriction flag storage unit 1-7-3 New mail check prohibition timer time storage unit 1-7-4 Condition storage unit 1-7-5 Mail storage unit

Claims (8)

A mobile communication terminal connected to a mail server via a communication network having a plurality of communication paths and receiving mail from the mail server,
Mail checking means for making an inquiry as to whether or not mail addressed to the mail server has arrived at the mail server via the communication network;
Restriction status detection means for detecting the communication restriction status of the plurality of communication paths;
When it is detected by the restriction status detection means that any one of the plurality of communication paths is restricted, a predetermined communication is performed using another communication path different from the communication path. The e-mail confirmation unit is controlled to make the inquiry every time elapses, and when there is an inquiry instruction by a user operation, the remaining time until the predetermined time elapses is acquired, and the remaining time is a predetermined threshold value A mobile communication terminal comprising: a control means for controlling the mail confirmation means so as to limit the inquiry if the remaining time is equal to or greater than a predetermined threshold value .   The mobile communication terminal according to claim 1, wherein the predetermined time is a fixed time stored in advance. The restriction status detection means further detects a restriction rate representing the degree of communication restriction,
The mobile communication terminal according to claim 1, wherein the predetermined time is a time according to a detected restriction rate. When the mail confirmation means receives a new arrival notification from the mail server informing that the mail addressed to itself has arrived from the mail server, a receipt notification is transmitted to the mail server to notify the mail server that the new arrival notification has been received. Having means,
4. The portable communication terminal according to claim 1, wherein the control unit controls the mail confirmation unit so as to omit transmission of a receipt notification by the receipt notification transmission unit. Further comprising a determination means for determining whether or not reception of the mail addressed to itself transmitted from the mail server has failed,
The control means includes
The mail confirmation means is controlled so as to limit the inquiry for at least a predetermined time if communication restriction is performed when it is determined by the determination means that reception of mail has failed. Item 5. A mobile communication terminal according to any one of Items 1 to 4. 6. The mobile communication according to claim 5, wherein the control means controls the mail confirmation means so as not to limit the inquiry when the determination means determines that the reception of the mail is successful. Terminal. A mail receiving program for receiving mail from the mail server by a mobile communication terminal connected to the mail server via a communication network having a plurality of communication paths,
On the computer,
A mail confirmation function for inquiring whether or not mail addressed to the mail server has arrived at the mail server via the communication network;
A restriction status detection function for detecting a communication restriction status of the plurality of communication paths;
When it is detected that any one of the plurality of communication paths is restricted, the inquiry is performed every predetermined time using another communication path different from the communication path. The mail confirmation function is controlled to perform the inquiry, and when there is an inquiry instruction by a user operation, the remaining time until the predetermined time elapses is acquired, and if the remaining time is within a predetermined threshold, the inquiry If the remaining time is equal to or greater than a predetermined threshold value, a mail receiving program is provided that implements a control function for controlling the mail checking means to limit the inquiry. Further realizing a determination function for determining whether or not the reception of the mail addressed to itself transmitted from the mail server has failed,
The control function is
The mail confirmation function is controlled to limit the inquiry for at least a predetermined time if communication restriction is performed when it is determined that reception of the mail has failed. The mail receiving program described.

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