JP2008182585A - Telecommunications system and telecommunication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a telecommunications system and telecommunication method in which transmission process is not finished, even if an internal processing followed by a telecommunication process is completed, when the transmission process is performed after returning into a service zone. <P>SOLUTION: If a call-back registration is made so that a telecommunication process part 52 starts the telecommunication process, after the internal process of an internal process executing part 51 is executed, a suppressing part 542 suppresses a determination result from being transferred to an out-of-service zone transmission process part 541 by inhibiting service zone determination itself for the telecommunication process by a service zone camping determining part 53 or by discarding or ignoring the result of service zone determination made by the service zone determining part 53. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a communication apparatus that performs out-of-service transmission and a communication method thereof.

Conventionally, in a communication device such as a mobile terminal, at the time of outgoing call processing, whether the communication device is out of service area or within service area (that is, whether communication with the communication network is possible) is determined (out-of-service determination ), And when the communication device is located outside the service area, it is general that the outgoing call processing is not performed. However, in the communication device with this configuration, after the communication device is moved into the service area, it is necessary to execute the call processing performed outside the service area again, which is inconvenient for the user, and the user forgets and troublesome the call processing again. There was a disadvantage that sometimes I felt.
For example, Patent Document 1 or 2 discloses a technique for eliminating such disadvantages.
JP-A-6-224838 Japanese Patent Laid-Open No. 11-178064

In Patent Documents 1 and 2, if a call operation is performed in an out-of-service state, the call operation is reserved, and if the call is not entered within a preset time, the reservation is canceled and set. A communication apparatus and a transmission method are disclosed that automatically perform a transmission operation based on a transmission operation when a callable area is entered within a predetermined time, and notify the user that the transmission has been performed.
However, the techniques disclosed in Patent Documents 1 and 2 cannot cope with processing in a case where outgoing processing is performed after predetermined internal processing is completed. That is, for example, in a communication terminal that can download and play a moving image via a communication network, it is not possible to cope with a process of downloading a moving image file after making preparations for playing a moving image inside the communication terminal.

  In order to cope with such a case, there is a communication terminal that can register to start communication for download on condition that predetermined internal processing has been completed. Such processing (starting another processing after a predetermined condition is satisfied) is called callback processing, and registration of each processing in this way is called callback registration.

  Here, in the communication device that registered the callback so as to perform the communication process after the end of the predetermined internal process, after the internal process is completed, the out-of-service area determination is performed. If it is out of service area, the callback is registered so that the communication process is terminated.

  However, when internal processing ends immediately after callback registration is performed, if it is determined that out of service area is out of service area, communication processing ends. sell. In other words, for example, when out-of-service call processing is performed in which outgoing call processing is performed when returning to the service area when outgoing processing is performed in an out-of-service state such as underground, internal processing is terminated before exiting to the ground (range). At this point, the out-of-range call processing is terminated because the out-of-range determination at the time of completion of the internal processing is determined to be out of range, and the operation as intended by the user is not performed. There was a disadvantage that the call processing was not performed automatically after it was in the service area).

  The present invention provides a communication device and a communication method that do not end the calling process even if the internal process performed before the communication process is completed when performing the calling process after returning to the service area in order to eliminate the disadvantages described above. The purpose is to do.

  In order to achieve the above-described object, a communication device according to a first invention includes a communication unit, a transmission processing unit that performs transmission processing by the communication unit in response to a transmission operation, and out-of-range determination according to radio wave reception sensitivity. An out-of-range determination unit that performs internal processing, an internal processing execution unit that performs internal processing, and a communication processing unit that performs communication processing for starting communication via the communication unit after completion of the internal processing of the internal processing execution unit The communication processing unit continues the communication when the internal processing execution unit determines that it is in the in-range state after the internal processing is completed, and the call processing unit An out-of-service transmission processing unit that performs out-of-service transmission processing when the transmission operation is performed when the determination unit determines that the out-of-service state is performed, and internal processing of the internal processing execution unit when the out-of-service transmission processing is performed Is completed, Having a suppressing portion for suppressing the of out-of-range transmission processing is terminated in accordance with the distance out the determination in the distance outdoor decision unit associated with the completion of the internal processing.

  A communication method according to a second aspect of the present invention includes a first step of performing out-of-range call processing in response to a call operation, a second step of performing internal processing, and the internal in the second step when in an out-of-service state A third step of performing a communication process for starting communication via the communication unit after completion of the process, and an out-of-service determination according to the radio wave reception sensitivity at that time for the communication process performed in the third step And a fifth step of suppressing termination of the out-of-service transmission process in response to out-of-service determination in the fourth step.

  According to the present invention, it is possible to provide a communication device and a communication method that do not end the calling process even when the internal process performed before the communication process is completed when the calling process is performed after returning to the service area.

A communication apparatus 100 according to an embodiment of the present invention will be described.
FIG. 1 is a block diagram illustrating a configuration of the communication apparatus 100 according to the present embodiment.
As illustrated in FIG. 1, the communication device 100 includes a communication unit 1, a storage unit 2, a display unit 3, an input unit 4, and a control unit 5.

The communication unit 1 transmits and receives various data to and from the server device via a communication network (not shown in FIG. 1). The various data are, for example, data such as voice calls and emails, moving image data, music data, and the like.
The storage unit 2 stores various data used for each operation of the communication device 100. The various data is, for example, necessary for programs and operations such as e-mails, voice data, image data, moving image data received by the communication unit 1 from the server device via the communication network, and applications that operate on the communication device 100. It is a kind of data.

The display unit 3 is a display device having a display such as a liquid crystal or organic EL (Electro-Luminescence), and displays characters such as e-mails and memos. In addition, the display part 3 may display not only a character but an image, a moving image, etc., for example.
The input unit 4 is an input device such as a numeric keypad, a button, or a switch, and receives user input during various operations of the communication apparatus 100.

The control unit 5 comprehensively controls the operation of the communication device 100. That is, at the time of various operations of the communication device 100, processing for controlling each component of the communication device 100 and performing the operation is executed.
The control unit 5 further includes an internal processing execution unit 51, a communication processing unit 52, an out-of-range determination unit 53, and a transmission processing unit 54.

  The internal process execution unit 51 controls execution of internal processes of the communication device 100. The internal processing includes, for example, storage processing for storing data in the storage unit 2, drawing processing for performing drawing on the display unit 3, data format conversion processing, and moving image reproduction processing for causing the display unit 3 to reproduce moving images. These are various processes performed in the communication apparatus 100.

The communication processing unit 52 controls the communication unit 1 and performs communication processing for performing communication with a communication network or the like in accordance with a user operation or the like via the input unit 4. The communication process is a process of exchanging data with the communication network via the communication unit 1 such as transmission / reception of data with respect to the communication network.
In the case of performing data upload processing, streaming processing, and the like, the communication processing unit 52 according to the present embodiment starts communication processing on the condition that the internal processing executed by the internal processing execution unit 51 has been completed.
In the communication process, the communication processing unit 52 basically continues the communication process when the out-of-range determination unit 53 described later determines that it is within the range, and communicates when it determines that it is out of range. The process ends.

The out-of-range determination unit 53 determines whether the communication device 100 is within a communicable range or out of a communicable range. The determination method outside the communication range is not limited in the present invention. Conventional techniques can be used.
The transmission processing unit 54 controls the communication unit 1 in accordance with a transmission operation via the user input unit 4 or the like to make a call. The calling operation is an operation for starting communication processing with the communication network, such as calling a voice call or sending a mail.
In addition, the transmission processing unit 54 further includes an out-of-service transmission processing unit 541 and a suppression unit 542.

The out-of-service transmission processing unit 541 performs a transmission operation via the user's input unit 4 or the like when the out-of-service determination unit 53 determines that the communication device 100 is currently outside the communication service area according to the reception sensitivity of the radio wave. Depending on the, out-of-service call processing is performed.
Out-of-service call transmission processing is processing for executing a call when the mobile phone is in an in-service state when it is in an out-of-service state at the time of transmission by a call operation or the like. In the out-of-service calling process, the out-of-service calling process is to be ended if the in-service state is not reached before a predetermined time elapses after the out-of-service calling process is executed.
However, the out-of-service call processing unit 541 ends the out-of-service call processing when the out-of-service determination unit 53 determines that the state is out-of-service again during execution of the out-of-service call processing.
Further, the out-of-service transmission processing executed by the out-of-service transmission processing unit 541 may be set in advance (at the start of out-of-service transmission) so as to automatically end (time out) when a predetermined time elapses.

  When the out-of-service transmission processing unit 541 is executing out-of-service transmission, the suppression unit 542 performs internal processing (for example, uploading) performed by the internal processing execution unit 51 before starting communication in communication processing such as data upload processing and streaming processing. If the data format conversion of data, preparation for reproduction of streaming data, etc.) are completed, the out-of-range determination performed by the out-of-range determination unit 53 with the end of the internal processing is suppressed. Alternatively, when it is determined that the out-of-range determination is performed by the out-of-range determination unit 53 upon completion of the internal processing, the suppression unit 542 discards or ignores the determination result and performs out-of-range transmission processing. The out-of-service transmission of the part 541 is continued. Detailed operation of the suppression unit 542 will be described in detail in a later operation example.

In addition, the control unit 5 can perform callback processing so that the communication processing unit 52 performs communication after the internal processing execution unit 51 finishes executing the internal processing. Callback registration can be performed by the user via the input unit 4, for example.
Specifically, when performing communication processing such as data upload processing or streaming processing, internal processing is performed in the communication apparatus 100, and communication with the communication network is started after the internal processing is completed. Specifically, when data upload processing is performed, internal processing for converting uploaded data into an upload format is performed, and communication with the server via the communication network is performed after the data conversion processing, which is the internal processing, is completed. To upload data. In addition, when performing the streaming process, an internal process for preparing to play back the downloaded data is performed, and after the preparation for playback, which is the internal process, is completed, communication is performed with the server via the communication network, Download the data. Thus, when performing communication processing such as data upload processing and streaming processing, the control unit 5 causes the internal processing execution unit 51 to perform internal processing in the communication device 100 before performing communication via the communication network. When the signal indicating that the internal processing is completed is called back by the internal processing execution unit 51, the out-of-range determination unit 53 performs the out-of-range determination, and if this determination result is within the range, the communication processing unit At 52, communication processing such as upload and download is started.
However, during the out-of-service call processing, the out-of-service determination unit 53 receives a signal (callback signal) indicating that the internal processing performed by the internal processing execution unit 51 is completed before communication processing such as upload or download. If the result of out-of-service determination performed in this way is out of service, the out-of-service transmission processing is terminated by this out-of-service determination, and there is a problem that out-of-service transmission is wasted.
Therefore, in the communication device 100 according to the present embodiment, when the out-of-service transmission processing unit 541 performs the out-of-service transmission processing, this internal processing is performed even when the internal processing is completed by the internal processing execution unit 51. By suppressing out-of-range determination performed by the out-of-range determination unit 53 upon completion, or discarding or ignoring the out-of-range determination performed by the out-of-range determination unit 53 upon completion of internal processing, The out-of-service calling process is prevented from being terminated.

FIG. 2 is a diagram illustrating an appearance of a mobile phone that is an example of the communication apparatus 100.
As shown in FIG. 2, in the communication device 100, an upper housing 101 and a lower housing 102 are connected by a hinge portion 103 so as to be opened and closed.
The upper housing 101 has a display unit 3 such as a liquid crystal screen.
The lower housing 102 has an input unit 4 such as a numeric keypad or a cross key.

Hereinafter, an operation example of the communication apparatus 100 according to the present embodiment will be described in detail.
FIG. 3 is a flowchart for explaining an operation example when the suppression unit 542 of the communication apparatus 100 prohibits the out-of-service determination itself.
The flowchart illustrated in FIG. 3 assumes a case where the communication device 100 is in an out-of-service state at the start time.
FIG. 3 shows an operation example when the suppression unit 542 prohibits the out-of-service determination itself.
Step ST1:
When communication processing such as data upload or streaming is instructed in accordance with an input to the input unit 4 by the user, the control unit 5 performs communication processing of the communication processing unit 52 after completion of the internal processing executed by the internal processing execution unit 51. Register the callback process to be executed.
Step ST2:
The transmission processing unit 54 performs out-of-range determination by the out-of-range determination unit 53 when performing a transmission process in response to a transmission instruction according to an input (transmission operation) to the input unit 4 of the user. At this time, if the determination result of the out-of-service determination unit 53 is within the service area, the outgoing call process is continued and communication is started. If the determination result is out of service, the service returns from the out-of-service area to the service area. Out-of-service call processing is performed to start communication by performing outgoing processing at this point. In this out-of-service call processing, it is determined whether or not the mobile phone has returned to the service area by periodically making an out-of-service determination. A process for resuming the calling process is performed. Note that the outgoing call processing is terminated if the mobile phone does not return to the service area even after a predetermined time elapses due to a timeout or the like. And then. Since it is in the out-of-service state when receiving the transmission instruction, this out-of-service transmission process is performed, and the process proceeds to the next step ST3.

Step ST3:
The internal process execution unit 51 executes the internal process registered for callback in step ST1.
Step ST4:
The communication processing unit 52 determines whether the internal processing of the internal processing execution unit 51 has been completed. If the internal processing is not completed, the process returns to step ST3 and the internal processing in the internal processing unit 51 is continued. If it is determined that the internal processing has been completed, the process proceeds to step ST5.

Step ST5:
The control unit 5 performs the out-of-range determination by the out-of-range determination unit 53 in order to start the communication process upon completion of the internal processing. In order to avoid being terminated by the completion of the processing, the out-of-service determination accompanying the completion of the internal processing is prohibited. Therefore, if it is determined in step ST4 that the internal processing has been completed, it is determined in step ST5 whether or not out-of-service call processing is being performed.
Step ST6:
If it is determined in step ST5 that the out-of-service call transmission processing is being performed, a command for performing out-of-service determination performed by the out-of-service determination unit 53 upon completion of the internal processing is cut, and Prohibit outside judgment. The prohibition of out-of-range determination here only prohibits out-of-range determination upon completion of internal processing, and does not prohibit out-of-range determination in out-of-range transmission processing. In step ST6, out-of-service call processing is continued.

Step ST7:
If a predetermined time has elapsed from the start of out-of-service transmission started in step ST2 (out-of-service transmission processing has timed out), the process proceeds to step ST8, and otherwise returns to step ST6.
Step ST8:
Out-of-service call transmission processing unit 541 ends the out-of-service call processing determined to have timed out in step ST7 because it does not return to the service area until a predetermined time has elapsed since the start of out-of-service call processing.

Step ST9:
The communication processing unit 52 causes the out-of-range determination unit 53 to perform out-of-range determination and determines whether or not it is within the range. If the result of the out-of-range determination is out of the service area, the same determination is repeated until it is determined that the user is within the service area. If the service area is determined to be within the service area, the process proceeds to step ST10.
Step ST10:
The communication processing unit 52 performs (restarts and continues) the communication process so as to start communication performed after the internal process in step ST3 is completed.
In the above-described flowchart, it has been described that out-of-service transmission is started after callback registration and then internal processing is performed. However, the order of these processes may be changed, and before communication processing is started during out-of-service transmission processing. When it is detected that the internal processing performed in step S <b> 1 is completed, it may be configured to prohibit the out-of-range determination performed when the internal processing is completed. In addition, when it is determined by the out-of-service call processing that the mobile phone has returned to the service area before the internal processing is completed, the call processing in the out-of-service call processing may be preferentially performed. After the process is completed, internal processing may be continued to perform communication processing.

As described above, according to the communication device 100 of the present embodiment, when the out-of-service call transmission processing is being performed, the communication processing unit 52 that is callback-registered to be executed after the internal processing of the internal processing execution unit 51 is completed. The out-of-service transmission processing unit 541 performs out-of-service transmission according to the out-of-service determination in the out-of-service determination processing according to the internal processing execution. It is possible to avoid a situation where the processing ends.
In addition, when internal processing that is started before the execution of communication processing is completed during out-of-service call processing, the communication processing is interrupted and the out-of-service call processing is preferentially executed to execute the call processing when out of service Even if it is a case, the transmission process can be performed quickly, and when the communication process is interrupted, the communication process is resumed after the transmission process is completed, thereby performing the rapid communication process. Can do.

  Further, as described above, the suppression unit 542 of the present embodiment prohibits the out-of-range determination performed by the out-of-range determination unit 53 upon completion of the internal processing of the internal processing execution unit 51 as illustrated in the flowchart of FIG. In addition, the out-of-range determination unit 53 is caused to execute out-of-range determination, and when the out-of-range determination is determined to be in the out-of-range state, the determination result is discarded or ignored, and the out-of-range transmission processing unit 541 It is also possible to continue out-of-service transmission. Hereinafter, an operation example of the communication apparatus 100 in such a case will be described.

FIG. 4 is a flowchart for explaining an operation example when the suppression unit 542 of the communication apparatus 100 discards or ignores the result of out-of-service determination.
Step ST11:
When communication processing such as data upload or streaming is instructed in accordance with an input to the input unit 4 by the user, the control unit 5 performs communication processing of the communication processing unit 52 after completion of the internal processing executed by the internal processing execution unit 51. Register the callback process to be executed.
Step ST12:
The transmission processing unit 54 performs out-of-range determination by the out-of-range determination unit 53 when performing a transmission process in response to a transmission instruction according to an input (transmission operation) to the input unit 4 of the user. At this time, if the determination result of the out-of-service determination unit 53 is within the service area, the outgoing call process is continued and communication is started. If the determination result is out of service, the service returns from the out-of-service area to the service area. Out-of-service call processing is performed to start communication by performing outgoing processing at this point. In this out-of-service call processing, it is determined whether or not the mobile phone has returned to the service area by periodically making an out-of-service determination. A process for resuming the calling process is performed. Note that the outgoing call processing is terminated if the mobile phone does not return to the service area even after a predetermined time elapses due to a timeout or the like. And then. Since it is in an out-of-service state when receiving a call instruction, this out-of-service call processing is performed, and the process proceeds to the next step ST13.

Step ST13:
The internal process execution unit 51 executes the internal process registered for callback in step ST11.
Step ST14:
The communication processing unit 52 determines whether the internal processing of the internal processing execution unit 51 has been completed. If the internal process is not completed, the process returns to step ST13, and the internal process in the internal process execution unit 51 is continued. If it is determined that the internal processing is completed, the process proceeds to step ST15.

Step ST15:
The control unit 5 transmits to the out-of-range determination unit 53 a command for performing out-of-range determination for communication processing in response to the end of the internal processing of the internal process execution unit 51.
Step ST16:
The out-of-range determination unit 53 executes out-of-range determination as to whether the communication apparatus 100 is within or out of the communicable range with the communication network in response to the out-of-range determination command transmitted in step ST15.

Step ST17:
If the out-of-range determination result of the out-of-range determination unit 53 in step ST16 is out of range, the process proceeds to step ST18. Otherwise, the process proceeds to step ST22.
Step ST18:
When the result of the out-of-range determination performed by the out-of-range determination unit 53 in step ST17 is the out-of-range determination, the suppression unit 542 discards or ignores the result and prevents the result from being transmitted to the out-of-range transmission processing unit 541. To do.
Originally, when the result of out-of-range determination performed by the out-of-range determination unit 53 is out-of-range determination, the out-of-range transmission processing unit 541 ends the out-of-range transmission processing, but this result is suppressed by the suppression unit 542 of this step. Since it is not transmitted to the out-of-service transmission processing unit 541, even when the out-of-service determination unit 53 determines that it is out of service, the out-of-service transmission processing of the out-of-service transmission processing unit 541 can be suppressed.

Step ST19:
If a predetermined time has elapsed since the start of out-of-service call transmission (out-of-service call transmission timed out), the process proceeds to step ST20. Otherwise, the process returns to step ST17.
Step ST8:
Out-of-service call transmission processing unit 541 ends the out-of-service call processing determined to have timed out in step ST19 because it does not return to the service area until a predetermined time has elapsed since the start of out-of-service call processing.

Step ST21:
The communication processing unit 52 resumes the communication process in response to the end of out-of-service call transmission by the out-of-service call processing unit 541 in step ST20.
Step ST22:
Out-of-service transmission processing unit 541 terminates the out-of-service transmission processing because it has been determined by the out-of-service determination unit 53 in step ST17. Further, the communication processing unit 52 continues the communication process. Alternatively, the communication process after the completion of the internal process may be interrupted or terminated by the determination of the return to the service area, and the call process in the out-of-service call process may be started. When the communication process is interrupted, the communication process may be resumed after the communication associated with the call process in the out-of-service call process ends.

  As described above, according to the communication device 100 of the present embodiment, when the communication processing unit 52 is registered to call back so as to start the communication processing after the internal processing of the internal processing execution unit 51 is executed, the suppressing unit 542 However, the out-of-range determination itself for communication processing by the out-of-range determination unit 53 is prohibited, or the result of the out-of-range determination performed by the out-of-range determination unit 53 is discarded or ignored, and the determination result is transmitted out of range. In order to suppress transmission to the processing unit 541, it is possible to prevent the out-of-service transmission process from being terminated regardless of the result of the out-of-service determination. Further, the out-of-service transmission of the out-of-service transmission processing unit 541 is not wasted, and the battery (not shown in FIG. 1) is improved (usually, the out-of-service transmission of the mobile terminal always emits radio waves, so the battery consumption Becomes intense).

The present invention is not limited to the embodiment described above.
That is, when implementing the present invention, various modifications, combinations, sub-combinations, and alternatives may be made to the components of the above-described embodiments within the technical scope of the present invention or an equivalent scope thereof.

  The mobile phone that is the communication device 100 shown in FIG. 2 is an example, and the present invention is not limited to this. For example, instead of the folding type as shown in FIG. 2, the present invention can also be applied to apparatuses having other shapes such as a straight type, a revolver type, a slide type, and a biaxial rotation type. In particular, the present invention can be applied to communication devices other than mobile phones.

FIG. 1 is a block diagram illustrating a configuration of the communication apparatus 100 according to the present embodiment. FIG. 2 is a diagram illustrating an example of the appearance of the communication device 100. FIG. 3 is a flowchart for explaining an operation example when the suppression unit 542 of the communication device 100 prohibits the out-of-service determination itself. FIG. 4 is a flowchart for explaining an operation example when the suppression unit 542 of the communication apparatus 100 discards or ignores the result of out-of-service determination.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... Communication apparatus, 101 ... Upper housing | casing, 102 ... Lower housing | casing, 103 ... Hinge part, 1 ... Communication part, 2 ... Memory | storage part, 3 ... Display part, 4 ... Input part, 5 ... Control part, 51 ... Inside Processing execution unit, 52 ... Communication processing unit, 53 ... Out-of-range determination unit, 54 ... Transmission processing unit, 541 ... Out-of-range transmission processing unit, 542 ... Suppression unit

Claims (6)

A communication department;
A transmission processing unit that performs a transmission process by the communication unit in response to a transmission operation;
Out-of-range determination unit that performs out-of-range determination according to radio wave reception sensitivity;
An internal processing execution unit that performs internal processing;
A communication processing unit that performs communication processing for starting communication via the communication unit after the internal processing of the internal processing execution unit is completed;
With
The communication processing unit continues the communication when it is determined by the out-of-service determination unit after the internal processing is completed by the internal processing execution unit that is in the in-range state,
The call processing unit
An out-of-service transmission processing unit that performs out-of-service transmission processing when the call operation is performed when the out-of-service determination unit determines that the out-of-service state is present;
When the internal processing of the internal processing execution unit is completed while performing the out-of-service transmission processing, the out-of-service transmission processing is performed according to the out-of-service determination in the out-of-service determination unit when the internal processing is completed. A suppressor for suppressing the termination of
A communication apparatus comprising: The suppression unit prohibits the out-of-range determination by the out-of-range determination unit when the internal processing of the communication processing is completed when the out-of-range transmission processing is performed. The communication apparatus according to claim 1. The suppression unit transmits the out-of-range transmission to the out-of-range transmission processing unit even when the determination result of the out-of-range determination unit when the out-of-range transmission processing is being performed is out of range upon completion of the internal processing of the communication processing The communication apparatus according to claim 1, wherein the processing is continued. The communication processing unit interrupts or terminates the communication processing when completion of the internal processing is detected during the out-of-service transmission processing by the out-of-service transmission processing unit. The communication device according to item. The communication device according to claim 4, wherein, when the communication processing is interrupted, the communication processing unit starts communication after the internal processing after the out-of-service transmission processing ends. A first step of performing out-of-service call processing in response to a call operation when in an out-of-service state;
A second step for internal processing;
A third step of performing communication processing for starting communication via the communication unit after completion of the internal processing in the second step;
A fourth step of performing out-of-range determination according to the radio wave reception sensitivity at that time for the communication processing performed in the third step;
A fifth step of suppressing termination of the out-of-service call processing according to the out-of-service determination in the fourth step;
A communication method characterized by comprising:

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