Delay analysis for interlan traffic using two suitable TDMA satellite access schemes

Abstract

Two demand assignment time division multiple access (TDMA) satellite access schemes that are suitable for providing flexible interconnections of local area networks are compared by means of two simulations; Fifo Ordered Demand Assignment/Information Bit Energy Adaptive (FODA/IBEA) and Combined Fixed Reservation Assignment (CFRA). A unique simulation tool was used, a meshed network of very small aperture terminals (VSATs) under the control of a master station was considered and similar networking conditions were applied to both access schemes. The generated traffic had two components with different level of burstiness; bulk traffic and interactive traffic. The performance evaluated is the delay for each traffic component. We show that CFRA is best when connecting clusters of only a few stations and even individual stations exchanging light traffic. On the other hand, FODA/IBEA is better suited to interconnect networks, or within networks with many hosts, where heavy traffic is more likely. © 1997 John Wiley & Sons, Ltd.

Integration of Fade Mitigation within centrally managed MF-TDMA/DVB-RCS networks

“…Celandroni et al have described the concepts and implementation details of a complete fade countermeasure system based on adaptive TDMA, with demand assignment of capacity [7]. Association of an up-link power control feature with the bit and coding rate variation gives the system an interesting ability to cope with fade conditions [3][4][5][6]8]. These studies are of great significance as an adaptation of such modelling to the case of MF-TDMA for DVB-RCS is actually essential.…”

An Emulator For Testing The Performance Of Framed Access Schemes

“…We describe a proof-of-concept implementation, which is completely functional and easy to extend. The prototype is a portable software package, written in C, and has been used in research projects [12,13]. The allocation methods considered by FRACAS may have either centralised or distributed control.…”