Packet Delivery Performance in Dense Wireless Sensor Networks

Wireless sensor networks are expected fine monitoring in all kinds of environments, but many of these environments, especially the forest, send our wireless sensors transmitting into bad conditions. Reflections and scattering from foliages, collision of simultaneous transmissions, attenuation of the signal, and many other factors make transmission worse and worse. And conditions become extremely awful in dense WSNs. We designed several experiments for studying packet delivery in dense wireless sensor networks, the most basic aspect of wireless communicating, in different environments: small woods and an outdoor parking lot in a college. We calculated the packet reception ratio and analyzed the spatial correlation of it which deeply impacts the performance of data acquisition of wireless sensor networks.