Architectures, Protocols and Algorithms of Sensor Networks

This Reprint presents a curated collection of recent advances in sensor network technologies, reflecting their growing role in modern intelligent systems and data driven applications. The contributions focus on the design of efficient architectures, communication protocols, and intelligent algorithms that enhance reliability, scalability, and long-term operation of wireless sensor networks. Particular emphasis is placed on energy-efficient strategies, including adaptive quality of service control and data transmission reduction techniques, which extend network lifetime while maintaining performance. The Reprint also explores advanced localization methods, such as optimization-based node positioning, and novel deployment strategies for both terrestrial and UAV-assisted sensor systems. In addition, it covers sensor-driven control systems, parameter identification in complex physical models, and practical aspects of security, including access control in cloud-native environments. By integrating theoretical developments with experimental validation and real-world use cases, this Reprint provides a comprehensive overview of current trends and emerging challenges.