Channel access method. A channel-access scheme is also based on a multiple access protocol and control mechanism, also known as media access control (MAC).
This protocol deals with issues such as addressing, assigning multiplex channels to different users, and avoiding collisions. The MAC-layer is a sub-layer in Layer 2 (Data Link Layer) of the OSI model and a component of the Link Layer of the TCP/IP model. Fundamental types of channel access schemes[edit] These are the four fundamental types of channel access schemes: GSM.