A decentralized wireless sensor and actuator network (WSAN) virtualization model leverages the cloud of sensors paradigm to make the best use of the cloud and physical WSAN environments.n the last few years, we've witnessed the emergence of a new paradigm, the cloud of things (CoT), 1 a combination of cloud computing 2 and the Internet of Things (IoT). 3 A cloud is a large-scale (ideally unlimited) set of userfriendly virtualized computing resources that can be dynamically reconfi gured to serve a variable load, seeking optimum resource utilization. 2 The IoT paradigm envisions a global network infrastructure linking a wide variety of physical and virtual devices-the "smart things" that provide identifi cation, data processing, sensing, and connection capabilities to support the development of cooperative services and applications. 3 Essentially, in the CoT paradigm, the cloud acts as an intermediate layer between smart things and applications. Such an intermediate layer hides the complexity of smart things necessary to implement applications. 1 The IoT can benefi t from the cloud's virtually unlimited resources to implement service management and composition for utilizing smart things and the data they produce, 1 whereas the cloud can benefi t from the IoT by extending its scope to deal with real-world objects (smart things) in a distributed and dynamic way.Smart sensors play an important role in the CoT paradigm. 1 These sensors are tiny battery-powered devices endowed with processing, storage, sensing, actuation, and wireless communication capabilities. Such capabilities enable smart sensors to be grouped together to monitor variables, forming a wireless sensor and actuator network (WSAN). 3 WSANs include sink nodes, which are nodes at the edge of the WSAN that don't have the computational, energy, or communication resource constraints of smart sensors. Sink nodes serve as entry points for application requests, as well as points for collecting data from the smart sensors. In WSANs, the data acquired by the smart sensors can be processed and interpreted locally and/or sent to one or more of the sink nodes. Actuators can perform actions on the physical environments in response to the smart sensors' decisions.Given these smart sensor capabilities, WSANs show an advantage within the CoT paradigm in their support of the development of myriad novel coop-