Participatory sensing is a rising and promising field, which utilizes traditional mobile wireless sensors to gather data. However, because of the randomness of its participants, it is necessary to deploy wireless sensors in the sensing area at the same time, in order
This thesis addresses three important problems related to sensor data processing with the purpose to improve the correctness of results in execution of sensor queries. The first problem focuses on how to schedule updates to maintain the temporal validity of sensor data
Shooter localization systems are used to detect and locate the origin of gunfire. A wireless sensor network is one possible implementation of such a system. A wireless sensor network is sensitive to synchronization errors. Localization techniques that rely on the timing will
The Smart Stone Protocol (SSP) has been developed to achieve rapid synchronization in a wireless sensor network, establish Time Division Multiple Access (TDMA) communication slots, and perform distributed sensing with global shared awareness… Contents 1. Sensor Networks 1.1 Wireless Sensor Networks (WSNs)