Controlling Inbound Traffic

This work considers the problem of prioritizing the inbound TCP traffic of an organization network. The objective is to allocate dynamically a specific share of the incoming link bandwidth to a high priority inbound TCP traffic. However, if the high priority TCP traffic does not fully use its dedicated share, the low priority TCP traffic may take advantage of the unused bandwidth. Up to today, a network administrator has no control over the inbound traffic if the Internet Service Provider does not offer some QoS mechanism. Three different techniques..

Reseaux de petri appliques a la conception de systemes numeriques rapides

SIGLECNRS T Bordereau / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Discriminating Congestion Losses from Wireless Losses using Inter-Arrival Times At the Receiver

TCP has been designed and tuned to perform well under the assumption that all losses are an indication of congestion. When a TCP connection traverses a wireless link, packets may be lost due to wireless transmission errors, in addition to congestion losses. TCP implicitly assumes that all packet losses are due to congestion, and triggers congestion control mechanism when a packet loss is detected. It has been previously demonstrated that this feature of TCP affects performance adversely when packets are lost due to transmission errors. To avoid the performance degradation, techniques to distinguish between corruption and congestion losses without any explicit information from the network (routers or switches) are of interest

Is the Round-trip Time Correlated with the Number of Packets in Flight?

TCP uses packet loss as a feedback from the network to adapt its sending rate. TCP keeps increasing its sending rate as long as no packet loss occurs (unless constrained by bu#er size). Alternative congestion avoidance techniques (CATs) have been proposed to avoid such "aggressive" behavior. These CATs use simple statistics on observed roundtrip times and/or throughput of a TCP connection in response to variations in congestion window size. These CATs have a supposed ability to detect queue build-up