METHOD TO DECREASE ENERGY CONSUMPTION FOR SENSOR NODES IN A WIRELESS SENSOR NETWORK

摘要

The invention is intended for wireless sensor networks with decreased energy consumption for sensor nodes. The sensor network is logically divided into k functionally independent wireless sensor local area networks (LANs), which operate in their own local frequency channel. The sensor nodes operate in low-power mode, receive power from a battery, and its receivers are periodically switched on for a short period of time to detect a wake-up message. One or more wireless sensor LANs are assigned to one of n wireless transponders that operate in a retranslation frequency channel, consume constantly supplied power from the receiver and transmitter, and ensure two-way communication between the central server and wireless sensor LANs. Sensor nodes are switched to an active state upon command from the central server. At the wake-up moment, the transponders switch to the local frequency channel of a wireless sensor LAN for a short period of time.