Interference and Sink Capacity of Wireless CDMA Sensor Networks With Layered Architecture

The authors evaluate the sink capacity of wireless Code Division Multiple Access (CDMA) sensor networks with layered architecture. They introduce a model of interference at a sink considering two kinds of interference: Multiple Access Interference (MAI) and Node Interference (NI). They also investigate the activity of sensor nodes around the sink in relation to gathering data under a layered architecture. Based on the interference model and the activity of sensor nodes around the sink, they derive the failure probability of the transmission from a source node located one hop away from the sink using Gaussian approximation.