| 摘要 |
Disclosed is a method for constructing a virtual backbone in a Wireless Sensor Network (WSN). The method including the steps of setting a ‘Dominator’ status for a gateway or a sink node within the WSN, setting a ‘CoveredByDominator’ status for each neighbor node positioned in the transmission range of a node for which the ‘Dominator’ status is set, and setting a ‘NULL’ status for each of the other nodes, transmitting a beacon frame by periods from each node to neighbor nodes thereof within the WSN, receiving, by each node in the ‘CoveredByDominator’ status, the beacon frame from neighbor nodes thereof in the ‘NULL’ status, computing a time duration of a defer timer, and enabling the defer timer to operate by the computed time duration; and changing, to the ‘Dominator’ status, a status of a node whose defer timer expires earliest among the nodes all having the ‘CoveredByDominator’ status. |
