Method of context aware data-centric storage for wireless sensor networks

A method of context aware data-centric storage for wireless sensor networks, comprising:

• establishing a data storage range of an entire sensor network at a base station, dividing areas, and transmitting a message regarding data storage range information to entire sensor nodes;
• collecting data in the entire sensor nodes;
• determining whether there is a node responsible for storage of the collected data in the data storage range in a collection sensor node;
• determining whether the collected data are included in the storage range of the collection sensor node by the collection sensor node, when it is determined that there is a node responsible for storage;
• storing the data in the storage sensor node, when it is determined that the collected data is included in the storage range of the collection sensor node, and storing the data in the storage sensor node, after transmission the data from the collection sensor node to the sensor node responsible for storing collected data range, when it is determined that the collected data is not included in the storage range of the collection sensor node;
• storing the data in the storage sensor node, after a sequential operation of temporarily delay-storing the data in the collection sensor node when it is determined that there is no node responsible for storage,
• transmitting a message of exceptional data occurrence to the base station,
• changing the data storage range of the entire sensor network in the base station,
• establishing a new data storage range of each sensor node,
• distributing a message regarding new data storage range information to the entire sensor nodes,
• updating a range change history table, and
• transmitting the temporarily delay-stored data in the storage sensor node of the collection sensor node to a new storage node;
• determining whether data storage has not been carried out in each sensor node for a period of time longer than a specified time, after storing the data in the storage sensor node,
• returning to the step of collecting data when it is determined that data storage has not been carried out, and
• transmitting a message regarding invalid range occurrence from each sensor node to the base station when it is determined that data storage has not been carried out;
• and
• returning to the step of collecting data in the entire sensor nodes when it is determined that the scale of the invalid range is smaller than Γ in the base station,
• returning to the step of collecting data in the entire sensor nodes, after a sequential operation of changing the data storage range of the entire sensor network when it is determined that the scale of the invalid range is not smaller than Γ,
• establishing a new data storage range of each sensor node,
• distributing a message of new data storage range information to the entire sensor nodes, and
• updating a range change history table.