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This brief provides an overview of recent developments in multi-hop routing protocols for Wireless Sensor Networks (WSNs). It introduces the various classifications of routing protocols and lists the pros and cons of each category, going beyond the conceptual overview of routing classifications offered in other books. Recently many researchers have proposed numerous multi-hop routing protocols and thereby created a need for a book that provides its readers with an up-to-date road map of this research paradigm.

The authors present some of the most relevant results achieved by applying an algorithmic approach to the research on multi-hop routing protocols. The book covers measurements, experiences and lessons learned from the implementation of multi-hop communication prototypes. Furthermore, it describes future research challenges and as such serves as a useful guide for students and researchers alike.

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Preface. Acknowledgment.

1. Introduction.
1.1 Wireless Sensor Networks: An Overview. 1.2 Protocol Stack and Architecture. 1.3 Classification of Routing Protocols. 1.4 Limitations and Advantages of various Schemes. 1.5 Future Trend in Routing: Multi-Hop Routing Categories. References.

2. Multi-hop Energy Efficient Routing.
2.1 Introduction. 2.2 Multi-hop Energy Efficient routing protocols. 2.3 Comparative Analysis. 2.4 Summary and Future Trends. References.

3. Multi-hop Reliability and Network Operation Routing.
3.1 Brief History.3.2 Reliability and Network Operation Based protocols. 3.3 Comparisons. 3.4 Summary and Future Trends. References.

4. Multi-hop Network Structure Routing Protocols.
4.1 Introduction. 4.2 Network Structure based Routing Protocols. 4.3 Comparison. 4.4 Summary and Future Trends. References.

5. Future Research and Scope.
5.1 Fundamentals of WSN. 5.2 Future Scope.5.3 Conclusion. References. p

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Shalli Rani is an Assistant Professor with the S.S.D Women s Institute of Technology, Bathinda (Punjab), India. She received the MCA degree from Maharishi Dyanand University, Rohtak in 2004 and the M.Tech. degree in Computer Science from Janardan Rai Nagar Vidyapeeth University, Udaipur in 2007 and is currently pursuing the Ph.D. degree in Computer Applications from Punjab Technical University, Jalandhar. Her main area of interest and research is wireless sensor networks. She received a young scientist award in Feb. 2014 from Punjab Science Congress, in the same field.
Syed Hassan Ahmed received his B.S in Computer Science from Kohat University of Science and Technology (KUST), Kohat, Pakistan. Later on, he joined School of Computer Science and Engineering, Kyungpook National University, Korea, where he completed his Masters in Computer Engineering. Currently, he is pursuing his PhD in Computer Engineering at Monet Lab, KNU, Korea. In 2015, he has been a visiting researcher at theGeorgia Institute of Technology, Atlanta, USA. Since 2012, he has published over 50 International Journal and Conference papers in the multiple topics of wireless communications. Along with several book chapters, he also authored 2 Springer brief books. He is also an active IEEE/ACM member and serving several reputed conferences/journals as a TPC and Reviewer respectively. For the three consecutive years, 2014-2016, he won the Best Research Contributor awards in the workshop on Future Researches of Computer Science and Engineering, KNU, South Korea. His research interests include WSN, Underwater WSN, Cyber Physical Systems, VANETs and Information Centric Networks in Vehicular Communications.

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