I. Ryoo, Fac. of Eng., Tokyo Univ., Japan
H. Aida, Fac. of Eng., Tokyo Univ., Japan
T. Saito, Fac. of Eng., Tokyo Univ., Japan
This paper proposes a run-time monitor and bandwidth assignment scheme for delay-sensitive traffic in ATM (asynchronous transfer mode) network. The traffic monitor function is thought to be indispensable to support the QoS (quality of services) of the accepted calls and carry out the network resource management efficiently at the same time. The proposed scheme monitors user data cells by its counter which is driven by system clocks and makes a report on the monitor results to the upper plane such as control plane or network management plane. This feature makes it possible to do the run-time bandwidth assignment and can moderately reduce the size of cell buffers which is inevitable to observe input cell rates in existing traffic controls. Furthermore, any processing delays resulting from usage parameter controls can also be eliminated. The proposed scheme is conformed to efficiently manage the calls and reliably improve the overall system performances without a drop in QoS by computer simulations
Index Terms:
asynchronous transfer mode; performance evaluation; run-time bandwidth assignment; delay sensitive traffic; high-speed network; ATM; run-time monitor; bandwidth assignment scheme; QoS; network resource managementTCP/IP and the European ATM pilot - Bonaventure, O.; Danthine, A.; Klovning, E.; Danthine, A. Editor(s): Liu, M.T. Inst. d'Electr. Montefiore, Liege Univ., Belgium This Paper Appears in : Network Protocols, 1995. Proceedings., 1995 International Conference on on Pages: 270 - 277 This Conference was Held : 7-10 Nov. 1995 1995 ISBN: 0-8186-7216-1 IEEE Catalog Number: 95TB8122 Total Pages: xiii+376 References Cited: 16 Accession Number: 5211687 Abstract: Very few measurements have been done on wide area ATM networks. In this paper, we first look at how a compliant traffic can be generated with standard ATM equipment. We show that in our environment, even with a 23.42 Mbps VP out of 34 Mbps links, it is necessary to use some spacing in the ATM adapters to generate a compliant traffic. Our measurements show that with a large window TCP is able to achieve a throughput of 19 Mbps when the ATM level traffic is compliant with the traffic contract. However, if the ATM level traffic is not entirely compliant the segment loss rate increases quickly, and the TCP throughput collapses. A 3% change in the cell rate of the ATM level traffic can cause the TCP throughput to drop from 19 Mbps down to 1 Mbps. Subject Terms: transport protocols; performance evaluation; asynchronous transfer mode; wide area networks; ATM; wide area ATM networks; measurements; compliant traffic; TCP; TCP throughput; 34 Mbit/s; 23.42 Mbit/s; 1 Mbit/s; 19 Mbit/s
Citation:
I. Ryoo, H. Aida, T. Saito, "Simulation study of a run-time bandwidth assignment technique for delay sensitive traffic in high-speed network," icnp, pp.40, Third International Conference on Network Protocols (ICNP'95), 1995
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