Energy-Efficient Routing Protocols in Wireless Sensor Networks a Comprehensive Survey and Future Directions

Wireless Sensor Networks (WSNs) play a crucial role in modern communication systems, enabling real-time data collection and transmission in various applications, including environmental monitoring, healthcare, and smart cities. However, energy efficiency remains a significant challenge due to the limited power resources of sensor nodes. While numerous studies have explored energy-efficient routing protocols, they often rely on theoretical models and simulations, neglecting real-world deployment constraints. This research presents a comprehensive survey and future directions for energy-efficient routing in WSNs, addressing key limitations found in existing studies. Unlike previous works, this study integrates real-time implementation, security-aware routing mechanisms, AI-driven optimization techniques, and cross-layer energy management strategies to enhance efficiency and scalability. Furthermore, it evaluates the adaptability of routing protocols in dynamic, large-scale, and mobile WSN environments, ensuring fault tolerance and sustainability. By incorporating emerging technologies such as 5G, IoT, and blockchain-based solutions, this study provides a future-proof, practical framework for next-generation WSNs. The findings and recommendations in this research contribute to the development of robust, energy-efficient, and intelligent WSN routing protocols for diverse real-world applications.