Lampros Kalampoukas

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We study the performance of TCP in an internetwork consisting of both rate-controlled and nonrate-controlled segments. A common example of such an environment occurs when the end systems are part of IP datagram networks interconnected by a rate-controlled segment, such as an ATM network using the available bit rate (ABR) service. In the absence of(More)
We describe a new algorithm for rate allocation within the individual switches of an ATM network implementing a rate-based congestion control algorithm for Available Bit-Rate (ABR) traac. The algorithm performs an allocation in (1) time, allowing it to be applied to ATM switches supporting a large number of virtual circuits. When the total available(More)
The sharing of a common buffer by TCP data segments and acknowledgments in a network or internet has been known to produce the effect of <i>ack compression</i>, often causing dramatic reductions in throughput. We study several schemes for improving the performance of two-way TCP traffic over asymmetric links where the bandwidths in the two directions may(More)
We study the performance of TCP/IP on a multi-hop ATM network by simulation in an eeort to evaluate the eeec-tiveness of various congestion-control schemes at the ATM layer. The congestion control schemes considered are the ATM-Early Packet Discard (ATM-EPD) and link-level ow control. The performance of these schemes are compared against that of an ATM(More)
abstract In this paper we study the performance of an explicit rate allocation algorithm for ATM Networks using the available bit-rate (ABR) class of service. We examine the behavior of ABR traac with simple cell sources, and demonstrate that the allocation algorithm is fair and maintains network eeciency in a variety of network conngurations. We also study(More)