@phdthesis{Boehm2022, author = {B{\"o}hm, Sebastian}, title = {Split-Protocol-Stack network simulation and emulation of wireless embedded systems with Radio-in-the-Loop : towards accurate wireless network evaluation}, doi = {10.26127/BTUOpen-6144}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-61443}, school = {BTU Cottbus - Senftenberg}, year = {2022}, abstract = {Recent challenges and novel approaches of wireless communication networks are characterized by high performance requirements on the radio channel and by concepts of self-organization, in-network processing, or resource optimization which ultimately lead to distributed network applications, communication architectures, and radio transceivers. Associated evaluation is driven by a multitude of ever-increasing requirements that call for multidisciplinary expertise. Depending on the discipline, simulation is one of the most widely used technologies, whereby often abstract assumptions and models do not allow for sufficiently accurate, comparable results. In contrast, real-world measurements and field-tests can only be performed on actual systems, commonly under non-reproducible conditions. This thesis establishes with the Split-Protocol-Stack a new type of evaluation method that intends to help closing the gap between purely simulative analyzes and real-world tests. With the inclusion of real radio hardware and radio channels in the event-based simulation, this central hybrid approach in connection with the Radio-in-the-Loop methodology creates synergies in interdisciplinary fields. The approach contains analytical discussions, methodological strategies, and practical contributions that are summarized as key elements in the subsequent central considerations and challenges. With Real-Time-Shift, a pseudo-real-time synchronization approach for parallel simulation and radio channel emulation of communication flows is introduced. Based on the underlying time compensation scheme, the discrete event simulation is decoupled from real-time constraints when exchanging event messages with real-world wireless hardware. A physical layer emulation methodology and radio channel interface concept, called Radio-in-the-Loop, is introduced along with two practical realization approaches. Furthermore, strategic details on radio network planning with an approach to automatic hardware resource allocation are presented for radio channel emulation-capable network testbeds. The contributions of this work are evaluated using real-world reference measurements, practical application scenarios, and experiments that provide proof of concepts. By means of an exemplary selected cross-layer optimization scenario, the benefits are practically demonstrated and discussed. Finally, based on IEEE 802.15.4 as the reference protocol standard for low-power wireless networks, this thesis provides feasibility studies and analysis results using the representative prototype SEmulate for the Split-Protocol-Stack approach.}, subject = {Internet of things; Network simulation; Hardware-in-the-Loop; Modeling; IEEE 802.15.4; Internet der Dinge; Netzwerksimulation; Emulation; Modellierung; Emulation; Internet der Dinge; Netzwerksimulation; Hardware-in-the-loop; IEEE 802., 15, 4}, language = {en} }