On the impact of TCP and per-flow scheduling on Internet performance (extended version)

Details On the impact of TCP and per-flow scheduling on Internet performance (extended version) On the impact of TCP and per-flow scheduling on Internet performance (extended version)

2009-08-19

arxiv.org/abs/0908.2721v2

Computer Science

Networking and Internet Architecture

26 pages, 5 figures, shorter version submitted to INFOCOM 2010

Scientific paper

Internet performance is tightly related to the properties of TCP and UDP protocols, jointly responsible for the delivery of the great majority of Internet traffic. It is well understood how these protocols behave under FIFO queuing and what the network congestion effects. However, no comprehensive analysis is available when flow-aware mechanisms such as per-flow scheduling and dropping policies are deployed. Previous simulation and experimental results leave a number of unanswered questions. In the paper, we tackle this issue by modeling via a set of fluid non-linear ODEs the instantaneous throughput and the buffer occupancy of N long-lived TCP sources under three per-flow scheduling disciplines (Fair Queuing, Longest Queue First, Shortest Queue First) and with longest queue drop buffer management. We study the system evolution and analytically characterize the stationary regime: closed-form expressions are derived for the stationary throughput/sending rate and buffer occupancy which give thorough understanding of short/long-term fairness for TCP traffic. Similarly, we provide the characterization of the loss rate experienced by UDP flows in presence of TCP traffic.

Affiliated with

Also associated with

No associations

Rating

On the impact of TCP and per-flow scheduling on Internet performance (extended version) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the impact of TCP and per-flow scheduling on Internet performance (extended version), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the impact of TCP and per-flow scheduling on Internet performance (extended version) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-216274