We consider the problem of simulating traditional popula-tion protocols under weaker models of communication, which include one-way interactions (as opposed to two-way interactions) and omission faults (i.e., failure by an agent to read its partner’s state during an inter-action), which in turn may be detectable or undetectable. We focus on the impact of a leader, and we give a complete characterization of the models in which the presence of a unique leader in the system allows the construction of simulators: when simulations are possible, we give explicit protocols; when they are not, we give proofs of impossibility. Specifically, if each agent has only a finite amount of memory, the simulation is pos-sible only if there are no omission faults. If agents have an unbounded amount of memory, the simulation is possible as long as omissions are detectable. If an upper bound on the number of omissions involving the leader is known, the simulation is always possible, except in the one-way model in which one side is unable to detect the interaction.

Additional Metadata
Persistent URL dx.doi.org/10.1007/978-3-319-57586-5_38
Series Lecture Notes in Computer Science
Citation
Di Luna, G.A. (Giuseppe Antonio), Flocchini, P. (Paola), Izumi, T. (Taisuke), Izumi, T. (Tomoko), Santoro, N, & Viglietta, G. (Giovanni). (2017). Population protocols with faulty interactions: The impact of a leader. In Lecture Notes in Computer Science. doi:10.1007/978-3-319-57586-5_38