MB-ICBT protocol performance in star-configured VSAT satellite networks

The movable-boundary integrated CBR/bursty-data traffic, MB-ICBT, is a new version of hybrid protocols supporting both, circuit- and packet-switching techniques in VSAT network environments. Circuit-switching is applied to CBR traffic connections, which are admitted in the system on a DAMA basis. Bursty-data traffic, on the other hand, is allowed to contend randomly, sending simultaneously an anticipating reservation. A movable boundary policy is applied between the two traffic compartments to adapt to network loading conditions. The introduction of the anticipated reservation access for bursty-data, together with the movable-boundary policy, serve to minimize the collision resolution delay, largely significant in VSAT networks. The MB-ICBT protocol is analysed and simulation results verify the enhanced performance in terms of access delay for bursty-data traffic together with an improved overall channel throughput