Abstract
Battery-less wireless sensors powered directly by miniaturized en-ergy harvesters can be appealing only if communication betweennodes is realized without wasting energy. In devices that implementintermittent computing, efficient communications remain an openchallenge. Transmitters should be aware of unavailable receivers toprevent packet losses due to power failures. Backscatter transmis-sions can be used to propagate the energy state almost for free in thesurrounding. This paper presents a backscatter radio mechanismand a protocol that regulates the communication between nodes,guaranteeing packet transmissions only if sufficient energy is storedin the transmitter and the receiver. Simulation results demonstrateour approach’s effectiveness and show the performance of this newtype of intermittent communication.