EXPLOITation of an ATM testbed for broadband experiments and applications

Potts, Martin

doi:10.1049/ecej:19920068

Cited by 4 publications

(2 citation statements)

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“…which is in agreement with the algorithm in (8), (9) and (10). However, note that (14) only holds for 0 < 'tc < Tp and Tcl2 ~ Tp <Tc as is stated as a (strong) conjecture in [13].…”

Section: Throughput Of Gcra Based Upc Functions For Cbr Streamssupporting

confidence: 88%

“…Here the measurement results are used to verify the applicability of the analysis and simulations in the previous sections, using a real ATM network. The experiments were performed at the EXPLOIT test-bed, which has four ATM switches; several terminals with appropriate adapters and measurement equipment (see [10]). The Police Function Board (PFB) can implement several UPC mechanisms, like Leaky Bucket (LB), jumping window, moving window etc.…”

Section: Measurementsmentioning

confidence: 99%

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Analysis, simulation and experimental verification of the throughput of GCRA based UPC functions for CBR streams

Hoeksema

Kroeze

Witters³

1996

ATM Networks

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This paper investigates a Generic Cell Rate Algorithm (GCRA) based Usage Parameter Control (UPC) function implementing a discard function for non-conforming cells, thereby establishing a so-called Cell Discard Ratio (CDR) as UPC performance measure. Focusing on Constant Bit Rate (CBR) connections, the UPC transfer characteristics are studied in case of Peak Cell Rate Contract Violations. Also the influence of the Contracted Cell Delay Variation Tolerance value on the CDR performance of the UPC is incorporated in the study. Algorithmic formulas found by analysis as well as simulation results are compared against the outcome of test-bed measurements. As opposed to the approach in the analysis, the simulation effectively takes into account the delay experienced by the cells accessing the ATM slotted medium, as sole origin of cell delay variation. The applicability of the simulation and the D. D. Kouvatsos (ed.

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“…which is in agreement with the algorithm in (8), (9) and (10). However, note that (14) only holds for 0 < 'tc < Tp and Tcl2 ~ Tp <Tc as is stated as a (strong) conjecture in [13].…”

Section: Throughput Of Gcra Based Upc Functions For Cbr Streamssupporting

confidence: 88%

Section: Measurementsmentioning

confidence: 99%

Analysis, simulation and experimental verification of the throughput of GCRA based UPC functions for CBR streams

Hoeksema

Kroeze

Witters³

1996

ATM Networks

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Experimental validation of an ATM traffic control framework in the EXPLOIT testbed

Renger

Aarstad

Pettersen

et al. 1996

Trans Emerging Tel Tech

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Abstract. This paper deals with the experimental investigation of a preventive traffic control framework for ATM networks as implemented in the EXPLOIT Testbed. This framework comprises a Usage Parameter Control (UPC) function and a Connection Admission Control (CAC) function. The obtained measurement results are complemented and compared with simulation studies and analytical results. For several OdOff traffic types it is shown that the implemented UPC function enforces both the Peak Cell Rate (PCR) and the Sustainable Cell Rate (SCR) simultaneously. By measuring the cell loss ratio as a function of the number of multiplexed sources, admission boundaries for a given network performance objective can be found and compared with the implemented CAC function based on the convolution algorithm. It appears that network performance objectives can be guaranteed, while exploiting most of the possible multiplexing gain in a network with small buffers like the EXPLOIT Testbed. Finally, it is shown that the two co-operating functions constitute a traffic control framework which is robust against traffic contract violations as well as worst case traffic utilising the contracted UPC function tolerances maximally at both the cell level and the burst level.

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