Data synchronization system, data synchronization method, data center, and client terminal
First Claim
1. A data center for keeping the sameness between data in client terminal and data in a server through a communication link, said data center comprising:
- a server for storing data to be kept same as data in said client terminal;
data transmission means for sending data to be kept same as the data in said client terminal to said client terminal;
signal transmission means for sending a signal for checking the sameness at predetermined timing to said client terminal; and
control means for controlling the signal transmission performed by said signal transmission means based on the result of the transmission by said data transmission means.
1 Assignment
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Accused Products
Abstract
There is provided a data synchronization system, data synchronization method, data center, and client terminal that allow a client terminal to determine whether data held by the client terminal is up-to-date and allow synchronization between a server and the client to be maintained at low costs in a case where synchronization between data in the server and data in the client terminal is provided.
The data synchronization system for keeping the sameness between data in a client terminal 10 and data in a data server 20 through a communication link comprises a synchronization data transmitter 25 for sending to the client terminal 10 data to be kept same as data in the client terminal 10, a synchronization signal output module 33 for sending a synchronization signal for checking the sameness to the client terminal 10 at predetermined timing, and a synchronization signal transmission controller 23 for controlling the transmission of the synchronization signal by the synchronization signal output module 33 based on the result of the synchronization signal transmission by the synchronization signal output module 33.
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Citations
24 Claims
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1. A data center for keeping the sameness between data in client terminal and data in a server through a communication link, said data center comprising:
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a server for storing data to be kept same as data in said client terminal;
data transmission means for sending data to be kept same as the data in said client terminal to said client terminal;
signal transmission means for sending a signal for checking the sameness at predetermined timing to said client terminal; and
control means for controlling the signal transmission performed by said signal transmission means based on the result of the transmission by said data transmission means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A data synchronization system for keeping the sameness between data in client terminal and data in a server through a communication link, said system comprising:
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signal transmission means for sending a signal for checking the sameness to said server at predetermined timing;
transmission result detection means for detecting the result of transmission performed by said signal transmission means; and
control means for controlling said client terminal based on the transmission result detected by said transmission result detection means.
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12. A client terminal for keeping the sameness between data in said client terminal and a server through a communication link, said client terminal comprising:
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receiving means for receiving data to be kept same as data in said server and a signal for checking the sameness, said data being sent to said client terminal when needed and said signal being sent at predetermined timing;
receiving status detecting means for detecting the receiving status of said signal for checking the sameness sent at said predetermined timing; and
processing means for performing a predetermined process based on the receiving status detected by said receiving status detecting means. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A data synchronization system for keeping the sameness between data in client terminal and data in a server through a communication link, said system comprising:
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a server for storing data to be kept same as data in said client terminal;
data transmission means for sending data to be kept same as the data in said client terminal to said client terminal;
signal transmission means for sending a signal for checking the sameness at predetermined timing to said client terminal;
control means for controlling the signal transmission performed by said signal transmission means based on the result of the transmission of the data by said data transmission means; and
a client terminal for receiving data sent from said data transmission means and a signal sent from said signal transmission means. - View Dependent Claims (20)
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21. A data synchronization method for sending a signal for checking the sameness of data to a client terminal at predetermined timing;
- sending data to said client terminal as required, the sameness of said data being to be kept between said client terminal and a predetermined server, detecting a situation where said sent data is not received by said client terminal, and, if said situation where said sent data is not received by said client terminal is detected, stopping the transmission of said signal.
- View Dependent Claims (22, 23, 24)
Specification