Use case scenarios and preliminary reference model

Keyword list: HIDENETS, dependability, communication systems, ad hoc networks, wireless, middlewaresolutions, car-to-car communication, applications, use cases, business impact, preliminary reference modelThis document provides the starting point for the development of dependability solutions in theHIDENETS project with the following contents:(1) A conceptual framework is defined that contains the relevant terminology, threats and generalrequirements. This framework is a HIDENETS relevant subset of existing state-of-the-art viewsin the scientific dependability community. Furthermore, the dependability framework contains afirst list of relevant functionalities in the communication and middleware level, which will act asinput for the architectural discussions in HIDENETS work packages (WPs) 2 and 3.(2) A set of 17 applications with HIDENETS relevance is identified and their correspondingdependability requirements are derived. These applications belong mostly to the class of car-to-car and car-to-infrastructure services and have been selected due to their different types ofdependability needs.(3) The applications have been grouped in six HIDENETS use cases, each consisting of a set ofapplications. The use cases will be the basis for the development of the dependability solutionsin all other WPs. Together with a description of each use-case, application-specific architecturalaspects are identified and corresponding failure modes and challenges are listed.(4) The business impact of dependability solutions for these use cases is analysed.(5) A preliminary definition of a HIDENETS reference model is provided, which contains high-level architectural assumptions. This HIDENETS reference model will be further developed inthe course of the HIDENETS projects in close cooperation with the other WPs, which is thereason why the preliminary version also contains a collection of potential contributions fromother WPs that shall be developed and investigated in the course of the HIDENETS project.In summary, the identified use-cases and their requirements clearly show the large number ofdependability related challenges. First steps towards technical solutions have been made in this report inthe preliminary reference model, whereas the other work-packages have started in the meanwhile todevelop such solutions further based on ‘middleware technology’ (WP2), ‘communication protocols’(WP3), ‘quantitative analysis methodology’ (WP4), and ‘design and testing methodology’ (WP5).