networking scenarios

Sat Apr 12 01:20:15 EDT 2008

Javier,

The humble towns are most important.

An aside : when I was last in New York (for the story jam a couple weekends
ago) I saw a UNICEF poster display of a disaster-area "school in a box" --
two suitcase-sized containers with all of the materials and power-generators
needed to run a single server creating its own sat or radio internet
connection, and a few attached terminals.  The design was for regions with
no infrastructure at all.  A poster mockup listed XOs as ideal terminals...

SJ

2008/4/11 info at olpc-peru.info <info at olpc-peru.info>:

>  Hello Dafydd and all...
> *Question:*
> I think that you mean that the "school server" has "internet access".
> Is it possible to have a "school server" without "internet access" ? (just to do... what? bigger "collaboration" between the XOs? software repository? documents & books repository?.  Many scenarios are possible.
>
> So I think you can add to the fourth scenarios: "Internet access" or "No internet access" and what kind: ADSL, phone line, Satelital, or other ways.
> *Idea:*Add to your scenarios:
>
> "Kind of energy available for the XOs:"
>
> Then we will face the "forgotten" problem: the humble towns, the ones that are over the
> 3,500 meters altitude, the ones that are in the "worst" scenarios... they don't have any
> kind of electricity.  So the "cranck", the "solar panels", air or human generated energy
> is part of the equation IF we are going to reach those "worst scenarios".
>
> Helping first the ones that will survive? That is for first aid in disasters. In this
> case we must try to help the "forgotten" worst scenarios and I hope that MOST of the
> XOs that come to Peru will go to the poorest towns.
> *Comment:*
> You say: "...
>  - school WiFi
>    - access points
>    - school server with Jabber server
>      - only one server at a time
>    - this is what is deployed in Peru ...
>
> ... this is the situation most of our existing laptops are
> deployed in, and it's likely that upcoming deployments will be similar."
>
> I think that this scenario is good for a test, not as the intended "niche" were
> the XOs must be deployed.  I think the XO computers in Peru
> will get better use in the WORST scenarios.  A kid that lives in a town with a school that have
> 5 standard PCs with dialup Internet is in better condition that a kid that lives in a
> town with a school with no PCs and no Internet.  Who need us more? The second one.  Who will
> benefit more? The second one.
>
> Yes, yes, yes.  It is harder to put the XOs in the WORST scenario. And maybe 20% of the kids
> that are now 6 years old will not reach the 12 years old in those "forgotten villages" in my
> country (Peru).  But... we must try.
> *Better scenario (for developing best help with poorest children):*There is no need to travel to the high andes to find the kids that need us more.
> There are schools in the surroundings of Lima with "no light", "no tables", "no desks", "no chairs".
> Every kid is sit down in a brick.  The teacher
> uses the wall as board.  I don't know how many of this schools exists in Lima.
> But for sure that they exist, dozens? Yes, no doubt.
>
> Ah... the last earthquake gave us another opportunity: just 3 hours away
> from Lima, in the coast, no mountains,
> 90% of the schools have been destroyed.  In this "Ica" region Children are
> studying (if they are studying) in any kind of
> temporal "school" ... in the worst conditions.  There must be more than
> 200 schools (all sizes) destroyed there.
> Those kids deserve the opportunity to get a XO that can improve their
> educational conditions? Yes. No doubt.
>
> I hope that upcoming XO deployments will get not the poor children but the
> POOREST children in Peru.
>
> Let's keep moving.
>
> Best regards,
>
> Javier Rodriguez
> Lima, Peru
>
>
>
>
> Dafydd Harries wrote:
>
> This is something which was not completely clear to me until I talked to Wad
> about it the other day, and I think other people might find it useful. It
> should probably go on the wiki (assuming it isn't already there somewhere). I'd
> like some feedback about where it belongs. The closest thing I've found is this
> page:
>
>   http://wiki.laptop.org/go/Scenario_taxonomy
>
> Any errors are my own.
>
> There are four networking scenarios:
>
>  - simple mesh
>    - no access point
>    - no school server
>    - we are currently aiming to support up to 15 laptops in this case
>  - simple WiFi
>    - access points
>      - which tend not to handle multicast very well (1Mbit/s peak)
>    - no school server
>    - this is what G1G1 laptops will tend to encounter
>    - typically in the developed world
>  - school mesh
>    - no access point
>    - school server with Jabber server
>  - school WiFi
>    - access points
>    - school server with Jabber server
>      - only one server at a time
>    - this is what is deployed in Peru
>
> Our current priority in terms of collaboration is to improve supprt for the
> fourth case, as this is the situation most of our existing laptops are
> deployed in, and it's likely that upcoming deployments will be similar. Our
> secondary priority is improving support for the second case, as this is what
> will tend happen when laptops are taken home from school.
>
>
>
>
>
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