The aim of the proposed research programme is twofold: (1) to advance the state of the art and practice in predictable real-time and Internet networking and (2) training of early stage researchers to prepare them for careers in advanced technical development and research. By (1) the programme will contribute to strengthening the competitiveness of European industry and engineering research. By (2) the programme will provide competence that could play key roles in the European research and development of advanced products for many years to come.The technological basis for RetNet is the predictable communication network technology that has been developed into products by the private sector partner TTTECH. This programme aims to substantially broaden the applicability of this technology by (1) developing a wireless version of TTTECH’s TTEthernet technology, addressing the fundamental scientific challenge of providing dependable wireless communication, and (2) increasing the flexibility of TTTECH’s TTEthernet technology by extending it with on-line adaption and admission of traffic, thereby making the technology applicable in more dynamic “Internet-like” settings. Use cases from multiple industrial domains will guide the research and form the basis for evaluation and demonstration.