METHOD AND APPARATUS OF SENSOR NETWORK SUPPORTING BIDIRECTIONAL EVENT DETECTION

摘要

PURPOSE: An event transmission method of a sensor network and apparatus thereof are provided to improve energy efficiency by focusing a wake-up section and a data transmission section on a coordinator. CONSTITUTION: Signal including energy which is more than a predetermined size is sensed in an uplink section(810). The predetermined energy indicates the generation of an uplink event detected by an energy sensor node. A coordinator detects a downlink event. A synchronization packet for transmitting the downlink event or for receiving the uplink event is transmitted from a downlink section(840). [Reference numerals] (810) Uplink event generation?; (820) Uplink event generation notification; (821) Signal sensing?; (830) Downlink event generation?; (840) Synchronization packet transmission; (841) Synchronization packet reception?; (850) Access request frame transmission; (851) Access request frame reception?; (860) New beacon transmission and event transmission and reception; (861) New beacon reception and event transmission and reception; (AA) Coordinator; (BB) Sensor node; (CC,DD) Start