RPLL - Rendezvous protocol for long-living sensor node

Abstract

Sensor nodes (SNs), as constituents of wireless sensor network (WSN), are battery-powered not rechargeable devices and have limited amount of energy available. Since the lifetime of SNs is a crucial parameter for energy-efficient WSN design, it is essential to extend their lifetimes as much as possible. Here we propose a rendezvous scheme called Rendezvous Protocol for Long-Living SN, RPLL. This scheme is based on implementation of a duty-cycling technique. For each SN within WSN a unique identification number (ID) is allocated, thanks to which a collision problem is effectively remedied. The RPLL provides an on time wake-up of SNs in a fully decentralized way and fast detection of new appended SNs. Taking into account the WSN and SN working parameters, such as beacon time, beacon period, number of active SNs, and quartz oscillator instability, by using the proposed method, a WSN designer can determine the maximal lifetime of a SN, i.e. achieve optimal energy consumption. [Projekat Ministarstva nauke Republike Srbije, br. TR-32009: Low-Power Reconfigurable Fault-Tolerant Platforms]

Vision inspection and monitoring of wind turbine farms in emerging smart grids

“…12 shows the results for the whole video stream. As mentioned before, in order to estimate blade velocity, it is necessary to fit the gathered scores by appropriate function so we deploy -Sum of Sine‖ approximation function f(x) based on equation (14). In Fig.…”

“…In this section, we want to elaborate details of our comprehensive model for real-time video streaming from a sensor node to the coordinator node. Our main motivation to construct this architecture is that usually sensor nodes are low end devices with limited hardware resources [12][13][14] so running high complexity VI algorithms cannot be expected with acceptable performance in a light sensor node. As a result, for practical purposes, we propose to use our structured model for turbine blade velocity estimation at coordinator node as a medium or a high end receiver node.…”