Sensor Network System for Managing the Latest Data and History Data
First Claim
1. A server which receives observation data from a terminal which alternates between an activated state and a sleeping state, transmits the observation data by wireless communications in the activated state and stops transmitting observation data in the sleeping state, comprising:
- a latest data storage manager which manages a set of latest observation data of observation data received from the terminal;
a history data storage manager which manages history data of the observation data received from the terminal from a set of previous observation data received from the terminal to the set of latest observation data; and
a missing data manager which manages loss of the history data indicating missing observation data transmitted from the terminal and not received by the server,wherein the missing data manager sends a retransmission request to the terminal to retransmit the missing observation data that was not received by the server based on a predetermined rule, and receives the missing observation data retransmitted by the terminal receiving the retransmission request, andwherein, in case that a request for observation data is received from user terminal, at least one of the set of latest observation data managed by the latest data storage manager and the history data managed by the history data storage manager is output to the user terminal according to a type of the request for observation data received from the user terminal.
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Abstract
In a sensor network system comprising a sensor terminal and a management server, the sensor terminal transmits observation data acquired using the sensor, the management server has a latest data storage manager which manages the latest observation data among observation data received from the sensor terminal, a history data storage manager which manages the history of the observation data from any time when data was received from the sensor terminal to the latest observation data, and a missing data manager which manages missing history data, and compensates the missing history data based on a predetermined rule, and when a request for such observation data is received, at least one of the latest observation data managed by the latest data storage manager, and history data wherein the missing data has been compensated and managed by the history data storage manager, is output according to the type of request.
10 Citations
20 Claims
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1. A server which receives observation data from a terminal which alternates between an activated state and a sleeping state, transmits the observation data by wireless communications in the activated state and stops transmitting observation data in the sleeping state, comprising:
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a latest data storage manager which manages a set of latest observation data of observation data received from the terminal; a history data storage manager which manages history data of the observation data received from the terminal from a set of previous observation data received from the terminal to the set of latest observation data; and a missing data manager which manages loss of the history data indicating missing observation data transmitted from the terminal and not received by the server, wherein the missing data manager sends a retransmission request to the terminal to retransmit the missing observation data that was not received by the server based on a predetermined rule, and receives the missing observation data retransmitted by the terminal receiving the retransmission request, and wherein, in case that a request for observation data is received from user terminal, at least one of the set of latest observation data managed by the latest data storage manager and the history data managed by the history data storage manager is output to the user terminal according to a type of the request for observation data received from the user terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of communication between a terminal and a server, the terminal alternating between an activated state and a sleeping state, transmitting the observation data by wireless communications in the activated state and stopping transmitting observation data in the sleeping state, comprising the steps of:
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managing a set of latest observation data of observation data received from the terminal; managing history data of the observation data received from the terminal from a set of previous observation data received from the terminal to the set of latest observation data; managing loss of the history data indicating missing observation data transmitted from the terminal and not received by the server; and sending a retransmission request to the terminal to retransmit the missing observation data that was not received by the server based on a predetermined rule; receiving the missing observation data retransmitted by the terminal receiving the retransmission request, and wherein, in case of receiving a request for observation data from user terminal, at least one of the set of latest observation data and the history data is output to the user terminal according to a type of the request for observation data received from the user terminal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification