We measure the reliable transport of event features from source nodes to the sink in terms of the number of received data packets. Regardless of any application-specific metric that may actually be used, the number of received data packets is closely related to the amount of information acquired by the sink for the detection and extraction of event features. Hence, this serves as a simple but adequate event reliability measure at the transport level. The observed and desired event reliabilities are now defined as follows: Definition 1: The observed event reliability, , is the number of received data packets in decision interval at the sink. Definition 2: The desired event reliability,.
