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

Julián Fernández-Navajas <navajas@unizar.es> Wed, 09 October 2013 10:01 UTC

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Subject: Re: [tcmtf] Community Neworks: any idea about them?
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Arjuna,
I have been spoken to José about UDP-lite. It is a fine idea to consider 
the use of UDP-lite to TCM-TF. Thanks to Arjuna for the proposal.
Julián

El 08/10/2013 23:42, Arjuna Sathiaseelan escribió:
> 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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