[e2e] variable bandwidth link

Anurag Kumar anurag at ece.iisc.ernet.in
Wed Apr 18 07:07:18 PDT 2001


The following are  some papers on TCP performance
analysis over variable bandwidth links. A Markov
model for the bandwidth variations has been assumed.

Aditya Karnik and Anurag Kumar, "Performance of TCP Congestion Control
with Rate Feedback: Rate Adaptive TCP (RATCP)," IEEE Globecom 2000, San
Francisco, November 2000. 

Sanjay Shakkotai and Anurag Kumar, Aditya Karnik and Ajit Anvekar, ``TCP
over End-to-End ABR: TCP Performance with End-to-End Rate Control and
Stochastic Available Capacity,'' to appear in IEEE/ACM TON.

They can be downloaded from http://ece.iisc.ernet.in/~anurag

Anurag Kumar
Indian Institute of Science

> On Wed, 18 Apr 2001, Soo-hyeong Lee wrote:
> >
> > Hello,
> >
> > I am trying to model a wireless link empowered with link-level recovery as an error-free link with variable bandwidth.
> > I suppose link-level loss recovery (such as snoop or combination of FEC+RLP) can completely hide link-specific errors.
> > Dupacks are assumed to be either eliminated at the wireless link (by snoop) or ignored at the TCP sender (by TCP-Eiffel). The only way that a link-level error can be seen by upper-layer is by link-level timeout (in the snoop), which is assumed to be very rare.
> > IMHO, this link will be seen to upper-layer as an error-free variable bandwidth link, but unfortunately I find it difficult how to actually model it.
> >
> > I would be very grateful if one of you kindly give me a piece of advice.
> > Thanks in advance.
> >
> > Soo-hyeong
> >
> > PS : Intuitively, any shared medium access link (including Ethernet) could be modeled as a variable bandwidth (or variable delay) link. Is this wrong, or just hard to do?
> >
> >
> >

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