Approaches to Multiple Access Fixed Assignment (TDMA, FDMA, CDMA Each node is allocated a fixed fraction of bandwidth Equivalent to circuit switching very inefficient for low duty factor traffic Packet multiple access Polling Reservations and Scheduling Random Access Eytan ModianoApproaches to Multiple Access • Fixed Assignment (TDMA, FDMA, CDMA) – Each node is allocated a fixed fraction of bandwidth – Equivalent to circuit switching – very inefficient for low duty factor traffic • Packet multiple access – Polling – Reservations and Scheduling – Random Access Eytan Modiano Slide 4