Part I. Getting Started -- Chapter 1. Introduction -- Part II. Packet Level CTCs -- Chapter 2. Packet Level CTC based on Energy Modulation -- Chapter 3. Packet Level CTC based on Channel Intervention -- Part III. Physical Level CTCs -- Chapter 4. Physical Level CTC based on Cross Demapping -- Chapter 5. Physical Level CTC based on Digital Emulation -- Part IV. Upper Layer CTCs -- Chapter 6. BiCord: Bidirectional Coordination among Coexisting -- Part V. Conclusions -- Chapter 7. Research Summary and Future Directions.