3.1 significant advantages of senso

3.1 significant advantages of sensorsBased on IEEE 802.15.4 standard, it can realize coordinated communication among thousands of tiny sensors. In addition, the relay method is used to transmit data from one sensor to another through radio waves, which can make the communication efficiency very high. Generally speaking, with the increase of communication distance, the equipment complexity, power consumption and system cost are increasing. Compared with the existing wireless communication technologies, ZigBee technology is the most suitable standard for sensor networks because of its low power consumption and low rate. ZigBee technology is suitable for small data traffic, especially for sensor networks.3.1.1 low power consumption and low costIn ZigBee Based Sensor Networks, full function devices can be used as sink nodes. Terminal nodes generally use reduced function devices to reduce system cost and power consumption and improve battery life.3.1.2 large capacity and short time delayA single network can accommodate higher density of nodes. A Zigbee network can hold up to 254 slave devices and 1 master device, and 100 ZigBee networks can exist in one area at the same time, which can meet the requirements of large-scale sensor array.3.1.3 the protocol is simple and secureThe average length of ZigBee protocol stack is only 1 / 4 of that of Bluetooth or other IEEE 802.11. This simplification is very important for low cost, interactivity and maintainability. ZigBee technology provides data integrity check and authentication functions, and provides three-level security mode, which can flexibly determine its security attributes, and network security can be effectively guaranteed.