What is wireless?

Wireless＜What is wireless?＞
Wireless refers to communication using radio waves, light, or other methods without wires.
Short-Range Wireless Communication
Short-Range Wireless Communication : Recently, there has been a shift to wide range wireless communications utilizing multi-hop technology.
Modulation Methods
Modulation is the process of converting data into electrical signals optimized for transmission.
Wi-SUN
Wi-SUN is a next-generation wireless communication standard that uses the 920MHz band.