Hierarchical adaptive QoS control for voting-based data collection in hostile scenarios

Voting among replicated data collection devices is a means to achieve dependable data delivery to the end-user in a hostile environment. Here, a QoS prescription is about how often a correct data is delivered to the user in a timely manner. The paper deals with situations where the available network bandwidth varies dynamically and/or the environment fault parameters change unpredictably. A hierarchical adaptation method is employed to manage the QoS at two levels: the core voting module and a situational assessment module. The hierarchical QoS control enables an optimal use of resources by the voting system vis-a-vis the mission-critical application needs.