SARPVBR-a VBR rate control algorithm for HFC networks
Mário Macedo, Mario Serafim Nunes, H.D. Ramos · 2002
The paper presents a VBR rate control algorithm for the SARP (simple ATM based reservation protocol) for HFC (hybrid fiber coax) networks. The SARP is a hybrid reservation and rate based protocol, based on ATM, whose main characteristics are its simplicity, high efficiency, and flexibility to support different classes of traffic. SARPVBR tries to match the transmission grant rates given by the controller with the terminals instant transmission rates. To achieve that SARPVBR uses two basic protocol mechanisms: empty cell detection and piggybacking on the transmitted cells of the terminal queue length. Simulation results with square and sinusoidal sources show accurate terminal transmission rate matching, high bandwidth efficiency and low cell delay.