The development of self-adaptive real-time embedded (RTE) systems is an increasingly hard task due to the growing complexity of\nboth hardware and software and the high variability of the execution environment. Different approaches, platforms, and middleware\nhave been proposed in the field, from low to high abstraction level. However, there is still a lack of generic and reusable designs\nfor self-adaptive RTE systems that fit different system domains, lighten designers� task, and decrease development cost. In this\npaper, we propose five design patterns for self-adaptive RTE systems modeling resulting from the generalization of relevant existing\nadaptation-related works. Combined together, the patterns form the design of an adaptation loop composed of five adaptation\nmodules. The proposed solution offers a modular, reusable, and flexible specification of these modules and enables the separation\nof concerns. It also permits dealing with concurrency, real-time features, and adaptation cost relative to the adaptation activities.\nTo validate our solution, we applied it to a complex case study, a cross-layer self-adaptive object tracking system, to show patterns\nutilization and prove the solution benefits
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