Gangneung-wonju National University Industry Academy Cooperation Group

Gangneung-wonju National University Industrial Academy Cooperation Group

Pan-Jong Park

Tae-yun Chung

Han-Su Chung

Dae-iL Kim

A firmware updating method for the new node includes (a) a new node searching for neighbor nodes located within a predetermined distance, (b) the new node designating a parent node among the searched neighbor nodes, (c) in the case where the plurality of nodes include a join receiving state for joining the new node to the wireless sensor network, the designated parent node and the new node establishing a communication link by using the join receiving state, (d) the parent node transmitting firmware to the new node through the established communication link and (e) the new node receiving the firmware from the parent node, updating existing firmware with the received firmware, and driving the updated firmware to be jointed to the wireless network.

Method for updating firmware of sensor nodes on a wireless sensor network and firmware updater using for the same method

A communication method for a mobile sensor node in a wireless sensor network includes: in a state that the mobile sensor node performs synchronization by a message reception interrupt from a parent sensor node and determines an uplink active duration and a downlink active duration, transmitting a message to the parent sensor node in the transmitting duration of the uplink active duration, receiving and processing messages from the parent sensor node and sensor nodes linearly connected around the parent sensor node in the receiving duration of the uplink active duration, and resetting a new parent sensor node using the received signal strength indications RSSIs of the received messages; and transmitting a message to the parent sensor node in the transmitting duration of the downlink active duration, checking whether or not a message is received from the parent sensor node in the receiving duration of the downlink active duration, if the message is not received from the parent sensor node, determining that time synchronization fails and resetting a new parent sensor node, and if the message is received from the parent sensor node, performing time synchronization according to a message reception interrupt from the parent sensor node.

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Gangneung-si, South Korea

Pan-Jong Park