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

Arjuna Sathiaseelan <arjuna@erg.abdn.ac.uk> Tue, 08 October 2013 21:48 UTC

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From: Arjuna Sathiaseelan <arjuna@erg.abdn.ac.uk>
To: jsaldana@unizar.es
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Subject: Re: [tcmtf] Community Neworks: any idea about them?
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Hello Jose,
Any method that utilises the low bandwidth infrastructure more
efficiently is definitely useful.

Just a digression: have you considered the use of UDP-lite for TCM-TF?

Regards
Arjuna

On 8 October 2013 12:44, Jose Saldana <jsaldana@unizar.es>; wrote:
> 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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