JP6523103B2 - Communication device, control method of communication device, control program - Google Patents

Description

  The present invention relates to a communication device that communicates with an external server at a designated time, a control method of the communication device, and a control program.

  In recent years, a so-called cloud computing system has expanded, in which a server providing a web service and a user terminal communicate with each other and the user terminal can execute the web service provided by the server. In the cloud computing system, in order to prevent concentration of access from the user terminal to the server, there are many cases where operations are performed to disperse time zones in which the user terminal accesses the server.

  For example, Patent Document 1 discloses a data transfer device that stores time and attendance data in a memory and collectively transfers the data to a server at predetermined intervals. Further, Patent Document 2 discloses a marketing information collection system for connecting from a server to a terminal at fixed time intervals and acquiring information stored in the terminal.

Unexamined-Japanese-Patent No. 2013-131136 (July 4, 2013 publication) Japanese Patent Application Laid-Open No. 2001-306787 (disclosed on November 2, 2001)

  However, the inventions disclosed in Patent Documents 1 and 2 merely make the connection between the server and the terminal a fixed time interval, and it can be distributed that the access to the server is concentrated. Not exclusively.

  Further, in order to prevent concentration of access to the server, a configuration is conceivable in which the access time is specified from the server side. However, if the terminal can not be properly timed because the power is turned off, the access time can not be accessed after all, and the purpose of preventing concentration of access to the server can not be achieved. . In the case of the terminal which is not equipped with a rechargeable battery etc. especially in order to attain cost reduction, there is a possibility that it can not measure appropriately.

  Also, providing a real-time clock (RTC) that does not stop even at the time of a power failure is costly and is not practical in an apparatus that achieves cost reduction.

  The present invention has been made in view of the above problems, and an object thereof is a communication apparatus and the like capable of accessing a server at an appropriate access time even when the clock can not be properly counted due to a power-off or the like. To realize.

  In order to solve the above-mentioned subject, a communication device concerning one mode of the present invention is a communication device which communicates with an external server, and measures device side server time which is time considered as the present time of the above-mentioned external server. Together with the time measuring unit for measuring the device time that is the current time of the own device, and the time acquiring unit for acquiring the external device time from an external device different from the external server when the time measuring unit stops and then recovers. And correcting the device-side server time clocked by the timer unit from the relationship between the external device time acquired by the time acquisition unit and the device-side server time before the clock unit stops. And a correction unit.

  A control method of a communication apparatus according to an aspect of the present invention is a control method of a communication apparatus for communicating with an external server, wherein the communication apparatus is an apparatus-side server having a time considered to be the current time of the external server. It has a clock unit that clocks the device time, which is the current time of its own device, while clocking the time, and when the clock unit stops and then recovers, external device time from an external device different from the external server The timekeeping unit measures the time from the relationship between the time on the external device obtained at the time acquiring step, the external device time acquired at the time acquiring step, the device server time before the timekeeping unit stops, and the device time And V. correcting the device-side server time.

  According to an aspect of the present invention, it is possible to execute processing (for example, access processing to an external server) to be executed based on the device-side server time at an appropriate time.

It is a block diagram which shows the principal part structure of the telephone apparatus (master machine) which concerns on Embodiment 1 of this invention. It is a figure which shows the outline | summary of the information management system which concerns on the said Embodiment 1. FIG. It is a figure which shows an example and update process of a communication time management table in the said telephone (master machine), (a) is a figure which shows an example of a table, (b) corrects the time of a telephone (master machine) It is an explanatory view of a case, and (c) is a figure showing a flow of restoration processing performed at the time of restoration. It is a flow chart which shows a flow of processing at the time of usual time of the above-mentioned telephone (master). It is a flow chart which shows a flow of processing at the time of restoration of the above-mentioned telephone set (master machine).

Embodiment 1
Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5. First, an information management system 100 that is a premise of the present embodiment will be described.

(Configuration of Each Device in Information Management System 100)
The information management system 100 of this embodiment implements a nuisance call rejection service. The information management system 100 includes telephones (masters) 1 and 1a to 1c (communication devices), PC 2 (Personal Computer) (devices other than communication devices), and a management server (external server) 3. The nuisance call rejection service is a service that rejects an incoming call of a nuisance call on the telephone set 1 or 1a to 1c. In addition, the information management system 100 implements a WEB management service in which the user refers to the use history, use condition, and the like of the telephones 1 and 1 a to 1 c using the PC 2 and notifies the user of the information by e-mail.

  As shown in FIG. 2, the telephones 1 and 1 a to 1 c are communicably connected to the management server 3 via a telephone line network (Public Switched Telephone Network (PSTN)) 4. The telephones 1, 1a to 1c acquire data of the nuisance number list managed by the management server 3 from the management server 3, and manage their own nuisance call lists. Specifically, the telephones 1, 1a to 1c access the management server 3 at predetermined intervals (for example, once a day), acquire data for updating to the latest version of the nuisance call list, and Update the junk phone list managed by the machine. By this, it is possible to reject an unwanted call from the latest nuisance call list. In addition, the telephones 1, 1a to 1c, for example, various information such as usage history information (including a transmission operation or information related to transmission by the transmission operation) indicating the usage history of the telephone 1, 1a to 1c by the user at the time of the access The (terminal information) is transmitted to the management server 3. In addition, the telephones 1, 1a to 1c require, for example, nuisance call information indicating the telephone number (nuisance number) determined to be a nuisance call, which is an incoming call to the telephone 1, 1a to 1c used by each user. , And transmits to the management server 3 through the telephone network 4.

  Further, the telephone set 1 is connected to the other telephone sets 1a to 1c through the PSTN. The telephone set 1 may be connected to the management server 3 and the PSTN via one communication unit 20, or a communication unit connecting the telephone set 1 and the PSTN, and a communication connecting the telephone set 1 and the management server 3 It may be connected to the management server 3 and the PSTN via separate communication units as in

  Further, the connection between the telephone set 1 and the PSTN and the management server 3 may be, for example, a single line connection connecting the telephone set 1 and the management server 3 via the PSTN, or the telephone set 1 and the PSTN It may be a connection by a plurality of lines using the line to be connected and the line connecting the telephone 1 and the management server 3. The connection between the telephone set 1 and the management server 3 not via the PSTN is, for example, via another device connected to the telephone set 1 by a wired LAN, a wireless LAN, Bluetooth (registered trademark), WiFi (registered trademark) or the like. This can be done by connecting to the management server 3. For example, the telephone 1 may be provided with a communication circuit of WiFi (registered trademark) as the communication unit 20, and connected to the management server 3 via the WiFi router.

  The PC 2 is communicably connected to the management server 3 via the Internet network 5. The PC 2 transmits, to the management server 3, information (user information) on the user currently using the telephone 1. The information on the user indicates user identification information for uniquely identifying the user, a transmission destination e-mail address, and the like. The PC 2 may be a mobile phone (smart phone), a tablet, or the like as long as it is a communication terminal that can be connected to the Internet network 5. Further, the user performs user registration (for example, processing for causing the management server 3 to manage information associated with the user and the transmission destination e-mail address in association with each other) using the PC 2 in order to access the management server 3 . The information on the user may be transmitted from the telephone 1 at the time of access to the management server 3, for example.

  The management server 3 manages various information received from the telephones 1, 1 a to 1 c or the PC 2. The management server 3 also manages the nuisance call list. The management server 3 updates the nuisance call list using the nuisance call information provided by the police, a trader or the like, or the nuisance call information received from the telephones 1 and 1a to 1c. Specifically, the management server 3 checks the data of the nuisance call list (at first, all of the nuisance call list, then the latest version) at predetermined intervals (for example, when there is access from the telephones 1, 1a to 1c). The data for updating to the nuisance call list of (1) is transmitted to the telephones 1 and 1a to 1c. This allows the latest nuisance call list to be shared among users who subscribe to the nuisance call rejection service. Note that the first nuisance call list registered in the management server 3 may be generated based on the nuisance call information provided by the police, a trader, or the like.

  Further, the management server 3 manages various information such as usage history information received from the telephones 1 and 1a to 1c in association with the telephones 1 and 1a to 1c. The user accesses the management server 3 from the PC 2 using the user identification information for identifying the user, so that the usage history information of the telephones 1 and 1a to 1c of the user can be inquired to the management server 3 for confirmation. In addition, the usage history information received from the telephones 1 and 1a to 1c is provided to a third party (for example, a family of users) who is associated with the users of the telephones 1 and 1a to 1c. A third party (for example, a user's family) can check the usage history information of the telephone 1 etc. by accessing the management server 3 using the PC 2. Further, the management server 3 notifies the PC 2 of the notification of the telephone number rejected by the telephone 1 or the like, and the notification that the operation to the nuisance call list has been performed.

  The management server 3 may be realized by a plurality of servers. In this case, the information management system 100 may include, for example, a server providing a nuisance call list and a server providing terminal information instead of the management server 3.

  The telephone set (master unit) 1 is a master unit of the parent-child telephone system 200. Further, in the example shown in FIG. 2, telephones (child devices) 201 a-c are shown as slave devices of the parent-child telephone system 200.

  The parent-child telephone system 200 includes a telephone set (master unit) 1 communicating with the management server 3 and the other telephone sets 1a to 1b through the telephone line network 4 and a wireless communication network different from the telephone line network 4 (for example, DECT (Digital Enhanced Cordless) (Telephones) (external device) 201a-c that communicate with the telephone set (master unit) 1 through Telecommunications). Note that when there is no need to distinguish between the telephones (child devices) 201a to 201c, the telephones (child devices) 201 (or telephones 201) are simply described. Furthermore, although three telephones (child units) 201 are listed here, the number is not limited to this, and may be two or less, or four or more.

  The telephone set (master unit) 1 is always connected to a household outlet or the like and always supplied with power since it is necessary to always receive an incoming call from the outside. Also, the telephone set (child device) 201 has a battery inside so as to be portable. And when not in use, it is installed in a holder for charging so that the battery can be charged.

[Configuration of Telephone (Master Unit) 1]
Next, with reference to FIG. 1, the specific configuration of the telephone set (base unit) 1 will be described. As shown in FIG. 1, the telephone set (master unit) 1 includes a control unit 10, a communication unit 20, a storage unit (access time storage unit) 40, a display 31, a speaker 32, a microphone 33, and a counter 34.

  The display 31 displays various images, and is configured of, for example, an LCD (Liquid crystal display). The speaker 32 is for outputting voice during a call. The microphone 33 is for inputting the voice of the user in a call.

  The counter 34 counts up the time, and transmits a count up notification to the clock unit 11. In addition, the counter 34 stops counting up when the telephone set (base unit) 1 is powered off due to a power failure or the like.

  The storage unit 40 stores various information related to the telephone set (master unit) 1 and includes a communication time management table 41. In addition to this, it also has nuisance call information (not shown) and the like.

  The communication time management table 41 will be described with reference to FIG. FIG. 3A shows an example of the communication time management table 41. As shown in FIG. As shown in FIG. 3A, the communication time management table 41 is the terminal time (apparatus time) which is the time of the telephone (parent machine) 1 at the time of updating, and the time of the management server 3 acquired from the management server 3 The server time (apparatus side server time), the terminal time and the server time, and the time difference which is the difference, and the access time which is the next access time acquired from the management server 3 are associated with one another. In the example shown in FIG. 3A, the server time "08:00:00", the terminal time "10:00:00", the time difference "02:00:00", the next access time "09:00:00" Are associated with each other. The same applies below. The next access time may be stored independently without being associated with the server time, the terminal time, or the time difference.

  The reasons for clocking and storing server time are as follows. When the terminal time and the server time coincide, it seems that there is no need to store the server time. However, the terminal time can be arbitrarily set and operated by the user, and does not necessarily coincide with the server time. Further, the location where the management server 3 is present and the location where the telephone set (parent unit) 1 is present are not limited to the same country, and there may be a time difference between the two. Therefore, in order to access the management server 3 at an appropriate access time, the telephone set (base device) 1 counts and stores the server time which is the time of the management server 3 in addition to the terminal time which is the time of the own terminal. Need to be

  The control unit 10 controls the telephone set (master unit) 1 in an integrated manner, and includes a clock unit 11, a data control unit (server information acquisition unit) 12, and a recovery control unit (time acquisition unit, correction unit) 13. ing.

  The clock unit 11 counts up the current time (device time) of the telephone set (master device) 1 and the time (device-side server time) of the management server 3 acquired by the data control unit 12 described later It is to measure time. The time of the telephone set (master unit) 1 can be confirmed by the display 31 or the like. Also, the user can change at any time. Further, the time of the telephone (master unit) 1 clocked by the clock unit 11 is synchronized so as to be the same time as the telephone (child unit) 201. Note that they do not have to be strictly synchronized. This is because a slight error occurs due to the time lag of transmission and reception between the telephone set (master unit) 1 and the telephone set (child unit) 201. Further, even if the synchronization is not strictly performed, the access time does not affect the access time if the specified unit of the access time is a unit larger than the error (for example, specified in minutes).

  The data control unit 12 acquires the server time clocked by the clock unit 11, refers to the communication time management table 41, accesses the management server 3 at the access time, acquires data, time of the management server 3 (server The side server time) and the next access time are acquired, and the communication time management table 41 is updated.

  Further, the data control unit 12 updates the communication time management table 41 when the time correction process is executed in the telephone set (base unit) 1. Specifically, this will be described with reference to FIG. As shown in FIG. 3B, in the communication time management table 41, the server time "08:30:00", the terminal time "10:30:00", and the time difference "02:00:00" correspond to each other. If the terminal time is corrected to be 30 minutes late (for example, 8:30 to 9:00) when attached, the data control unit 12 updates the communication time management table 41 next. When the server time is "09:00:00", the terminal time is "11:30:00", and the time difference is "02:30:00".

  When the power is turned on after the power of the telephone set (master unit) 1 is turned off due to a power failure or the like, the recovery control unit 13 turns on the power of the time control unit 11 Execute recovery processing. More specifically, after the power is turned on, the recovery control unit 13 acquires current time information (external device time) from the telephone set (child unit) 201 via the extension communication unit 21. Then, the current server time is calculated from the acquired time information and the time difference stored in the communication time management table. Then, the communication time management table 41 is updated with the time information acquired from the telephone set (child machine) 201 as the terminal time and the calculated server time as the server time.

  Specifically, this will be described with reference to FIG. The example shown in FIG. 3C shows the case where the power of the telephone set (base unit) 1 is turned off when the terminal time is "10:30:00". After the power is turned off, when the power is turned on, the recovery control unit 13 acquires the current time from the telephone set (child device) 201 and corrects the terminal time. In the example shown in FIG. 3C, this is corrected to "11:30:00". Next, the recovery control unit 13 calculates the server time using the stored time difference “02:00:00”. Here, the communication time management table 41 is updated by calculating “09:30:00” as the server time by subtracting the time difference “02:00:00” from the terminal time “11:30:00”.

  Further, the recovery control unit 13 notifies the calculated server time to the clock unit 11 so that the clock unit 11 can perform clocking based on the corrected server time.

  The recovery control unit 13 may acquire the current time of the management server 3 from the management server 3 and update the communication time management table 41 only when the current time can not be acquired from the telephone set (child device) 201. .

  The communication unit 20 communicates with the telephone set (child unit) 201 or the management server 3 according to an instruction from the data control unit 12 or the recovery control unit 13 and includes an extension communication unit 21 and an outside communication unit 22.

  The extension communication unit 21 is used to perform extension communication, and more specifically, communicates with the telephone set (child unit) 201.

  The outside line communication unit 22 is used to perform outside line communication, and communicates with the management server 3 and the other telephones 1 a to 1 b via the telephone network 4.

(Flow of processing of the telephone set (base unit 1) at normal times)
Next, with reference to FIG. 4, an example of the flow of processing in the telephone set (base unit) 1 at normal times will be described. FIG. 4 is a flow chart showing the flow of processing in the telephone set (master unit) 1 at normal times. In the present embodiment, the communication time management table 41 is updated every 30 minutes, but the update interval is not limited to 30 minutes, and may be shorter or longer than 30 minutes. .

  First, the data control unit 12 determines whether 30 minutes have elapsed since the communication time management table 41 was updated last time, using the clocking of the clocking unit 11 (S1). If 30 minutes have elapsed since the previous update (YES in S1), the data control unit 12 updates the server time, the terminal setting time, and the time difference in the communication time management table 41 (S2). The terminal setting time and the server time are updated from the result measured by the clock unit 11. The time difference is updated by calculating the difference between the terminal time and the server time. As the next access time, the one updated last time is used as it is.

  Thereafter, when the server time measured by the clock unit 11 comes to the access time stored in the communication time management table 41 (YES in S3), the data control unit 12 manages via the outside line communication unit 22. The server 3 is accessed, and information (for example, nuisance call information, usage history, etc.) is uploaded (S4). Then, the data control unit 12 acquires the current time and the next access time of the management server 3 from the management server 3, and updates the communication time management table 41 (S5).

  The above series of processes (steps S1 to S5) are repeatedly executed at normal times. By these processes, the telephone set (base unit) 1 can access the management server 3 at the time designated as the access time, and can transmit and receive information.

(Flow of processing of the telephone set (base unit 1) at the time of restoration)
Next, with reference to FIG. 5, an example of the flow of processing in the telephone set (master unit) 1 at the time of restoration will be described. FIG. 5 is a flowchart showing the flow of processing in the telephone set (master unit) 1 at the time of restoration. Here, the recovery time is when the power supply of the telephone set (base device) 1 is turned off and then turned on.

  As shown in FIG. 5, the recovery control unit 13 starts recovery processing (S10). The start of the recovery process may be triggered by energization of the telephone set (master unit) 1. Next, the recovery control unit 13 determines whether the telephone set (master unit) 1 can communicate with the telephone set (child unit) 201 (S11). When communication with the telephone set (child device) 201 is possible (YES in S11), the following processing of step S12 to step S14 is executed.

  First, the recovery control unit 13 acquires time information indicating the current time of the telephone (child device) 201 from the telephone (child device) 201. Then, the terminal time of the communication time management table 42 is updated using the acquired time information (S12, time acquisition step). Next, the recovery control unit 13 calculates the server time using the updated terminal time and the time difference before recovery processing (S13), and updates the communication time management table 41 (S14, correction step).

  On the other hand, when communication with the telephone set (child device) 201 is not possible (NO in S11), the processing of the following steps S15 to S17 is executed. Since the current time can not be acquired from the telephone set (child device) 201 even when the telephone set (child device) 201 does not hold the time, the processing of the following steps S15 to S17 is executed.

  If the recovery control unit 13 determines that communication with the telephone set (child unit) 201 is not possible, the recovery control unit 13 acquires the current time of the management server 3 from the management server 3 via the outside line communication unit 22. Are updated (S15, time acquisition step). Since communication with the management server 3 at this time does not occur in normal operation, the minimum information necessary for recovery, that is, management, is minimized so that the load on the communication line and the management server 3 is minimized. Only the current time of the server 3 is received. Next, the recovery control unit 13 calculates the current time of the telephone set (base device) 1 from the acquired current time of the management server 3 and the time difference stored in the communication time management table 41 before recovery (S16) The communication time management table 41 is updated (S17, correction step).

  As described above, even if the telephone set (master unit) 1 is powered off for any reason, the telephone set (child unit) 201 is provided with a battery, so for the same reason as the telephone set (master unit) 1, There is no risk of the power being turned off. Therefore, there is a high possibility that the telephone set (child unit) 201 is accurately counting even when the time measurement of the telephone set (master unit) 1 is stopped.

  Then, according to the present embodiment, the telephone set (master unit) 1 can acquire time information from the telephone set (child unit) 201 that is accurately clocking after restoration. Also, the time difference between the terminal time and the server time is stored. As a result, it is possible to calculate an accurate server time after recovery, and to access the management server 3 at an appropriate access time.

  Further, the telephone set (master unit) 1 can be realized at a low price by not including the battery.

  Further, in the information management system 100 according to the present embodiment, the access from the telephone set (base unit) 1 to the management server 3 is the indicated time (access time) once a day. As a result, the processing load on the management server 3 may be increased or the communication line between the management server 3 and the telephone set (master unit) 1 may be congested due to the large number of telephone sets 1 simultaneously accessing the management server 3. It can be prevented.

  In addition, since the access time is specified only for the time, if it is not possible to access the management server 3 from the telephone (parent device) 1 at the access time, the telephone (parent Machine 1) accesses the management server 3. This makes it possible to prevent the telephone set (base unit) 1 from inadvertently accessing the management server 3 when the telephone set (base unit) 1 can not access the management server 3.

Second Embodiment
In the embodiment described above, the management server 3 is accessed from the telephone set (parent device) 1, and as a result, the communication time management table 41 is updated using the acquired server time and access time. In the present embodiment, the communication time management table 41 is updated after the server time acquired from the management server 3 is corrected using the time difference stored in the communication time management table 41.

  The server time acquired by the telephone set (master unit) 1 from the management server 3 may be different from the actual time of the management server 3 when the telephone set (master unit) 1 acquires it. This is because there is a possibility of delay due to a communication path between the management server 3 and the telephone set (base unit) 1 or the like.

  Therefore, in the present embodiment, the server time acquired from the management server 3 is corrected using the terminal time and the time difference stored in the communication time management table. Then, the communication time management table is updated using the corrected server time. As a result, even if the server time arrives at the telephone set (base unit) 1 delayed by the communication path or the like, the communication time management table 41 can be updated with the correct server time.

Third Embodiment (Example of Implementation by Software)
The control block of the telephone set (master unit) (in particular, each block of the clock unit 11, the data control unit 12, and the recovery control unit 13) is realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like. It may be realized by software using a CPU (Central Processing Unit).

  In the latter case, the telephone set (master unit) 1 is a CPU that executes instructions of a program that is software that implements each function, and a ROM (Read Only) in which the above program and various data are readable by a computer (or CPU). Memory or storage device (these are referred to as "recording media"), and RAM (Random Access Memory) for developing the program. The object of the present invention is achieved by the computer (or CPU) reading the program from the recording medium and executing the program. As the recording medium, a “non-transitory tangible medium”, for example, a tape, a disk, a card, a semiconductor memory, a programmable logic circuit or the like can be used. The program may be supplied to the computer via any transmission medium (communication network, broadcast wave, etc.) capable of transmitting the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave, in which the program is embodied by electronic transmission.

[Summary]
A communication device (telephone (master device) 1) according to aspect 1 of the present invention is a communication device that communicates with an external server (management server 3), and is an apparatus side server at a time considered to be the current time of the external server. An external device different from the external server (when the timekeeping unit (11) for measuring the device time, which is the current time of the own device, measures the time, and the timekeeping unit (11) stops and then recovers) Time acquisition unit (restoration control unit 13) for acquiring external device time from telephone (child unit) 201, the external device time acquired by the time acquisition unit, and the device side before the timer unit stops And a correction unit (recovery control unit 13) that corrects the device-side server time clocked by the clock unit from the relationship between the server time and the device time.

  According to the above configuration, for example, even when the power is turned off due to a power failure or the like, and the clocking is stopped, the device-side server time can be corrected to an appropriate time after restoration. Thereby, processing (for example, access processing to an external server) to be executed based on the device-side server time can be performed at an appropriate time.

  In the communication device according to aspect 2 of the present invention, in the above aspect 1, an access time storage unit (storage unit 40) that stores an access time that is a time to access the external server; The server information acquisition unit (data control unit 12) may access the external server when the server time reaches the access time stored in the access time storage unit.

  According to the above configuration, the external server is accessed when the device-side server time considered to indicate the time of the external server reaches the access time, so access is performed based on the time recognized by the external server be able to.

  In the communication device according to aspect 3 of the present invention, in the above aspect 2, the server information acquisition unit accesses the external server when the device-side server time after correction by the correction unit becomes the access time. Information may be acquired.

  According to the above configuration, the external server is accessed and information is acquired when the corrected apparatus-side server time reaches the access time, so that the external server can be accessed at an appropriate time to acquire the information. it can.

  In the communication apparatus according to aspect 4 of the present invention, in any of the above aspects 1 to 3, the own apparatus is a master of parent and child telephones, the external apparatus is a slave of parent and child telephones, and includes a rechargeable battery. The current time of the external device may be transmitted to the parent device as the external device time.

  The handset is equipped with a rechargeable battery, and it is highly likely that it continues to accurately measure the current time of the handset. Then, according to the above configuration, since the device time of the child device can be acquired from the child device which continues to accurately measure the current time, the current device time can be accurately recognized.

  In the communication device according to aspect 5 of the present invention, in any of the above aspects 1 to 4, when the external device time can not be acquired from the external device, the time acquisition unit receives the current server side server time from the external server. The acquiring unit may be configured to correct the device-side server time clocked by the clock unit based on the server-side server time.

  According to the above configuration, when the external device time can not be acquired from the external device, the server side server time is acquired from the external server, so that the device side server time can be corrected with certainty. In addition, since it is not necessary to acquire the server side server time from the external server each time a power failure occurs, communication with the external server increases unavoidably, increasing the processing load of the external server, or increasing the processing load of the external server It is possible to prevent the communication line between them from being crowded.

  In the communication apparatus according to aspect 6 of the present invention, the apparatus-side server time and the apparatus time, or the apparatus-side server time and the apparatus time may be set every predetermined time in any one of the aspects 1 to 5 A storage unit that stores the difference may be provided.

  According to the above configuration, the device-side server time and the device time, or the difference between the device-side server time and the device time can be stored in the own device. Also, since the difference or the time at which the difference can be calculated is stored for each predetermined time, even when the timekeeping unit stops due to a power failure or the like, the device-side server time is used using the latest difference before the stop. Corrections can be made.

  A control method of a communication apparatus according to a seventh aspect of the present invention is a control method of a communication apparatus for communicating with an external server, and the communication apparatus determines an apparatus-side server time that is considered as the current time of the external server. It has a clock unit that clocks the device time, which is the current time of the device itself, and when the clock unit stops and then recovers, acquires the external device time from an external device different from the external server. Timekeeping step (S12, S15), the external device time acquired in the time acquisition step, and the relationship between the device-side server time before the timekeeping unit stops and the device time And correcting the device-side server time to be measured (S14, S17). According to the above-mentioned composition, the same effect as the above-mentioned mode 1 is produced.

  The communication terminal according to each aspect of the present invention may be realized by a computer. In this case, the communication terminal is realized by the computer by causing the computer to operate as each unit (software element) included in the communication terminal. A control program of a communication terminal and a computer readable recording medium recording the same also fall within the scope of the present invention.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

1, 1a to 1c Telephone (master unit) (communication device)
3 Management server (external server)
11 clock unit 12 data control unit (server information acquisition unit)
13 Recovery control unit (time acquisition unit, correction unit)
40 storage unit (access time storage unit)
201a-c Telephone set (child unit) (external device)

Claims (7)

A communication device for communicating with an external server,
A clock unit that clocks an apparatus-side server time that is considered to be the current time of the external server and that counts the apparatus time that is the current time of the own apparatus,
A time acquisition unit that acquires an external device time from an external device different from the external server when the clock unit stops and then recovers;
A correction to correct the device-side server time clocked by the clock unit from the relationship between the external device time acquired by the time acquisition unit, the device-side server time before the clock unit stops and the device time A communication apparatus comprising: An access time storage unit that stores an access time that is a time to access the external server;
And a server information acquisition unit that accesses the external server when the device-side server time clocked by the clock unit reaches the access time stored in the access time storage unit. The communication device according to claim 1.   The communication according to claim 2, wherein the server information acquisition unit accesses the external server and acquires information when the device-side server time corrected by the correction unit becomes the access time. apparatus. Own device is the parent of parent-child phone,
4. The external device according to any one of claims 1 to 3, wherein the external device is a slave device of the parent-child telephone, includes a rechargeable battery, and transmits the current time of the external device to the master device as the external device time. The communication device according to claim 1. When the external device time can not be acquired from the external device, the time acquisition unit acquires the current server-side server time from the external server,
The communication apparatus according to any one of claims 1 to 4, wherein the correction unit corrects the apparatus-side server time clocked by the clock unit based on the server-side server time.   6. A storage unit for storing the device-side server time and the device time, or the difference between the device-side server time and the device time, at predetermined time intervals. The communication device according to any one of the items. A control method of a communication device for communicating with an external server, comprising:
The communication device is provided with a clock unit that clocks device-side server time, which is a time considered to be the current time of the external server, and counts device time, which is the current time of the own device.
A time acquisition step of acquiring an external device time from an external device different from the external server, when the time counting unit is stopped and then restored;
A correction to correct the device-side server time clocked by the clock unit from the relationship between the external device time acquired in the time acquisition step and the device-side server time before the clock unit stops and the device time A method of controlling a communication apparatus, comprising the steps of:

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