Re: [tcmtf] Community Neworks: any idea about them?

"Jose Saldana" <jsaldana@unizar.es> Tue, 08 October 2013 11:44 UTC

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From: "Jose Saldana" <jsaldana@unizar.es>
To: "'Arjuna Sathiaseelan'" <arjuna@erg.abdn.ac.uk>
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Date: Tue, 8 Oct 2013 13:44:05 +0200
Organization: Universidad de Zaragoza
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Cc: tcmtf@ietf.org, tsv-area@ietf.org
Subject: Re: [tcmtf] Community Neworks: any idea about them?
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Hi, Arjuna,

The idea of multipath TCP sounds interesting. It consists of "inverse
multiplexing" with TCP. However, TCM-TF does "multiplexing" with UDP.

What I was thinking is: can these scenarios also fit with TCM-TF? The idea
is to compress small-packet flows (VoIP, online games) in order to save
bandwidth, when a number of flows share a common path. We have discarded the
multiplexing of TCP, because the additional delay may modify the dynamics of
TCP.

TCM-TF combines header compression, multiplexing and tunneling, in order to
aggregate a number of flows, when a low-bandwidth link is in the path. Thus,
bandwidth can be saved and pps can be reduced, at the cost of processing
power.

Do you think this case can be found in these kind of networks? In the
discussion of TCM-TF in Berlin this summer, some people from Africa were
interested, since they think that low-bandwidth links have to be better
used.

Thanks!

Jose

> -----Mensaje original-----
> De: tcmtf-bounces@ietf.org [mailto:tcmtf-bounces@ietf.org] En nombre de
> Arjuna Sathiaseelan
> Enviado el: martes, 08 de octubre de 2013 11:42
> Para: jsaldana@unizar.es
> CC: tcmtf@ietf.org; tsv-area@ietf.org
> Asunto: Re: [tcmtf] Community Neworks: any idea about them?
> 
> Dear Jose,
>   I would like to take this opportunity to present some of the work we are
> doing here at Cambridge -
> 
> We are trying to solve the universal service problem in urban areas (where
> people cannot afford to access the Internet) using existing home broadband
> networks - home owners who have Internet connections share their
> Internet connection for free with those who dont have.
> 
> We are currently doing deployments in a deprived area in Nottingham ( see
> www.publicaccesswifi.org )
> 
> More on the LCDNet initiative is here:
> http://www.cl.cam.ac.uk/~as2330/lcd/index.html
> 
> There are interesting possibilities to do multi-path TCP between
aggregating
> multiple access points and we are exploring that option too.
> 
> The TIER group in berkeley have done quite a lot of nice work with
wireless
> for developing countries:
> tier.cs.berkeley.edu/
> 
> Happy to discuss more :)
> 
> Regards
> Arjuna
> 
> On 8 October 2013 10:24, Jose Saldana <jsaldana@unizar.es> wrote:
> > Hi all.
> >
> >
> >
> > I have recently "discovered" the concept of Community Networks. They
> > are "large scale, self-organized and decentralized networks, built and
> > operated by citizens for citizens." They are "also self-owned and
> > self-managed by community members, self-growing in links, capacity and
> services provided."
> >
> >
> >
> > A paper explaining them can be found here:
> > http://www.sigcomm.org/ccr/papers/2013/July/2500098.2500108
> >
> >
> >
> > Some examples:
> >
> > http://funkfeuer.at/
> >
> > https://wlan-si.net/
> >
> > http://www.bogota-mesh.org/en
> >
> >
> >
> > I would like to know your opinion about this:
> >
> >
> >
> > do you think this is a good idea?
> >
> >
> >
> > Can they be a good place for developing experiments?
> >
> >
> >
> > I think this can be a good solution for developing countries.
> >
> >
> >
> > In addition, regarding TCM-TF, can they be a new scenario where
> > traffic optimization could be interesting? I mean, they do not have
> > too much bandwidth, and they connect to the Internet through a single
> > link in many cases (a bottleneck). One of the services considered is
VoIP.
> >
> >
> >
> > Thanks a lot!
> >
> >
> >
> > Jose
> >
> >
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