Authors:
Andrzej Chydzinski
and
Blazej Adamczyk
Affiliation:
Silesian University of Technology, Department of Computer Networks and Systems, Gliwice, Poland
Keyword(s):
Buffer Overflow, Packet Loss, Loss Ratio, Per-flow Analysis.
Abstract:
Packet losses are common in TCP/IP networks. The main reason of that is the statistical multiplexing of flows at routers’ output buffers, resulting in random overflows of these buffers and dropping of packets. Although the losses caused by an overflowed buffer have been widely studied, these studies were mainly devoted to the aggregated traffic. Namely, the total loss ratio was analyzed, for all the packets arriving to the buffer, without distinction between separate flows. In this paper, we study the packet loss ratios suffered by distinct flows arriving to a common buffer. We first observe that the loss ratios of particular flows may differ significantly from each other, and from the total loss ratio. Then we single out the properties of the flow that may influence the per-flow loss ratio. We study also possible mutual dependencies between the flows, i.e. possibilities that the properties of one flow influence the loss ratios of other flows. Finally, we study the impact of the buff
er size and the distribution of the service time (packet size) on the per-flow loss ratios, as well as their relations to ech other.
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