This post is about wireless communications.
Wireless Communication Technologies
Wireless communication technologies:
- DECT
- Wi-Fi
- Li-Fi
- Bluetooth
- ZigBee
DECT
Digital Enhanced Cordless Telecommunications (DECT) is a wireless communication technology focused on voice.
DECT typically operates in the 1880–1900 MHz frequency range.
DECT types of access to the medium:
- FDMA
- TDMA
- TDD
Wi-Fi
Wi-Fi is a family of wireless network protocols based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access, allowing nearby digital devices to exchange data by radio waves.
IEEE 802.11 is a set of standards for general-purpose wireless communication technologies. The standard is developed by IEEE.
You can read this post about IEEE 802.11.
Types of Wi-Fi connections on this post.
Wi-Fi Analysis tools on this post.
Wi-Fi Protected Setup (WPS) has 4 configuration types:
- PIN
- PBC
- NFC
- USB
Push Button Configuration (PBC)
You can read this post about Wi-Fi security.
Li-Fi
Light Fidelity (Li-Fi)
Bluetooth
Bluetooth
You can read this post about bluetooth.
ZigBee
ZigBee is focused on application that requires safe communication with low rate of data and maximizing the battery lifespan.
It has lower energy consumption compared to Bluetooth.
It follows a mesh topology.
It uses AES algorithm for symmetric encryption.
ZigBee is stantardized as IEEE 802.15.4.
CSMA/CA
CMSA Collision avoidance (CSMA/CA) operates at OSI model 2. It uses the RTS/CTS method to reduce collsions.
It should not be confused with CSMA/CD. In a wireless network collision detection is not possible.