A privileged event data delivery scheme in wireless sensor network

This paper proposes an event data delivery scheme in a power beam wireless sensor networks. This architecture is used when there is a need to gather data from sensor node in a series of data specific to an event or time. The transmit distance of the beam signal is longer than that of the normal sensor node. The nodes of the network make a tree network when receiving a beam message transmitting from the powerful root node. All sensor nodes in a sink tree network synchronize to the superframe and receive beam messages in each superframe. When there is an event at a node, the node make a temporal route to the sink node and the nodes of the route can use the wireless channel in a privileged access. This scheme controls the backoff number effectively so the data delivery priority is given to the nodes of that route. The proposed privileged data delivery scheme is tested and the delay and jitter performance is enhanced comparing with the normal wireless data delivery scheme.