title: Communication Range Dynamics and Performance Analysis for a Self-Adaptive Transmission Power Controller.
abstract: The deployment of the nodes in a Wireless Sensor and Actuator Network (WSAN) is typically restricted by the sensing and acting coverage. This implies that the locations of the nodes may be, and usually are, not optimal from the point of view of the radio communication. Additionally, when the transmission power is tuned for those locations, there are other unpredictable factors that can cause connectivity failures, like interferences, signal fading due to passing objects and, of course, radio irregularities. A control-based self-adaptive system is a typical solution to improve the energy consumption while keeping good connectivity. In this paper, we explore how the communication range for each node evolves along the iterations of an energy saving self-adaptive transmission power controller when using different parameter sets in an outdoor scenario, providing a WSAN that automatically adapts to surrounding changes keeping good connectivity. The results obtained in this paper show how the parameters with the best performance keep a k-connected network, where k is in the range of the desired node degree plus or minus a specified tolerance value.
authors.affiliation: Centro de Investigación en Tecnologías Software y Sistemas Multimedia para la Sostenibilidad (CITSEM), Universidad Politécnica de Madrid, Calle Alan Turing 3, 28031 Madrid, Spain. nestor.lucas@upm.es.
authors.forename: Néstor
authors.initials: N
authors.lastname: Lucas Martínez
authors.affiliation: Centro de Investigación en Tecnologías Software y Sistemas Multimedia para la Sostenibilidad (CITSEM), Universidad Politécnica de Madrid, Calle Alan Turing 3, 28031 Madrid, Spain. jf.martinez@upm.es.
authors.forename: José-Fernán
authors.initials: JF
authors.lastname: Martínez Ortega
authors.affiliation: Centro de Investigación en Tecnologías Software y Sistemas Multimedia para la Sostenibilidad (CITSEM), Universidad Politécnica de Madrid, Calle Alan Turing 3, 28031 Madrid, Spain. vicente.hernandez@upm.es.
authors.forename: Vicente
authors.initials: V
authors.lastname: Hernández Díaz
authors.affiliation: Centro de Automática y Robótica, Universidad Politécnica de Madrid, Carretera Campo Real Km. 0.2, 28500 Arganda del Rey, Spain. raul.deltoro@car.upm-csic.es.
authors.forename: Raúl M
authors.initials: RM
authors.lastname: Del Toro Matamoros
keywords: communication range; connectivity; self-adaptive systems; transmission power control; wireless sensor networks