Channel access method

A channel access methods is used to share a communications channel or physical communications medium between multiple users.

• Frequency division multiple access (FDMA)
• Time-division multiple access (TDMA)
• Code division multiple access (CDMA)
• Frequency hopping spread spectrum (FHSS)
• Space division multiple access (SDMA)
• Carrier sense multiple access with collision detection (CSMA/CD)

Where these methods are used for dividing forward and reverse communication channels, they are known as duplexing methods, such as:

• Time division duplex (TDD)
• Frequency division duplex (FDD)