Reservations and polling systems Gated system-users can transmit only those packets that arrived prior to start of reservation interval E.g., explicit reservations Partially gated system -Can transmit all packets that arrived before the start of the data interval Exhaustive system-Can transmit all packets that arrive prior to the end of the data interval E.g., token ring networks Limited service system-only one(K) packets can be transmitted in a data interval R1 DI D2 R3 D3R1DI Exhaustive system arrivals Gated system arrivals y gated sys stem arrivReservations and polling systems • Gated system - users can transmit only those packets that arrived prior to start of reservation int erval – E.g., explicit reservations • Partially gated system - Can transmit all packets that arrived before the start of the data interval • Exhaustive system - Can transmit all packets that arrive prior to the end of the data interval – E.g., token ring networks • Limited service system - only one (K) packets can be transmitted in a data interval R1 D1 R2 D2 R3 D3 R1 D1 Gated system arrivals Partially gated s ystem arrival Exhaustive s ystem arrivals Eytan Modiano Slide 3