I. Introduction

II. WSN Virtualization Basics  
A. Node-level Virtualization  
B. Network-level Virtualization

III. WSN Virtualization – Motivating Scenarios and Requirements  
A. Motivating Scenarios

IV. State-of-the-Art  
A. Node-level Virtualization  
B. Network-level Virtualization  
C. Hybrid Solution  
D. Summary

V. WSN Virtualization Research Projects

VI. Research Issues  
1) Advanced Node-level Virtualization  
2) Network-level Virtualization  
3) Discovery and Publication  
4) Service Composition  
5) Sensor Node Selection and Task Assignment  
6) Reference Designs and Architectures  
7) WSN Virtualization Business Model & Standardization  
8) Energy Efficient Solutions

VII. Conclusion