The Internet-of-Things or Internet-of-Everything is the coin-term for a massive machine-type driven communication (mMTC), classified in its countless applications, such as Smart Cities, Factories, Homes or Agriculture, Industry, Health and many more. To connect these machine-things to the internet, radio access technology is needed, which allows:

• Massive User/Device Access
• Low-Power for long lifetime
• Low-Complexity for low-cost production
• Ultra-reliability low-latency communication (URLLC) for critical control applications
• High Spectral-Efficiency for high data-rates
• Robustness against Doppler shifts for high mobility