Institute of Electrical & Electronic Engineers
Successful deployment of Wireless Sensor Networks (WSNs) depends on energy efficiency in computations and networking operations. Significant research efforts have been pursued over the last decade to realize techniques aimed at data gathering while prolonging network lifetime. Within data gathering applications, there is a class of applications that do not reconstruct the entire sensing field but mainly focus on monitoring and event/anomaly detection scenarios. In such applications, only representative data values (or distinct within a given threshold) are desired from different geographical (spatial) regions. Utilizing existing data gathering techniques in this type of applications yields communication-inefficient solutions, and therefore expensive in terms of energy cost.