1. Introduction

2. Our Survey

3. Evolution of Mobile Communication Network

4. Current Research Progress towards 6G

5. 6G: State-of-the-art

6. Taxonomy

7. Key areas in 6G networks

8. Vision and key features for future 6G

9. Potential Challenges and Practical Considerations

10. Key Projects on 6G

11. Potential Applications of 6G

12. Conclusion