Double linked wireless sensor network being capable of bidirectional communication and method thereof

Abstract

Provided are a double linked wireless sensor network capable of performing bidirectional communication and a method of transmitting and receiving data. In each of nodes constituting the wireless sensor network, an active duration and an inactive duration are alternately repeated, and the active duration is configured to include an upstream duration, an intermission duration, and a downstream duration. Each of the downstream duration and the upstream duration is configured to sequentially include a second receive slot, a second receive processing slot, a first receive slot, a first receive processing slot, a transmit slot, a transmit processing slot, a first acknowledge slot, a first acknowledge processing slot, a second acknowledge slot, and a second acknowledge processing slot, and wherein bidirectional communication can be performed between the sink node and the terminal node in a single period of the active duration. In the wireless sensor network, a transmit processing duration TXP is maintained in a receiving mode capable of receiving data from other nodes, so that a new node can be easily joined as a terminal node or an intermediate node. In addition, in the wireless sensor network, each of the upstream duration and the downstream duration is provided with consecutive two receiving durations, so that, although links to consecutive two nodes are disconnected, it is possible to simply recover the links.