RE: [Embedlets-dev] Global Light Blinker Project proposal

[James C. <ca...@vi...>]

>The JXME sub-project has also created technology that allows a full 
>JXTA peer to act as a proxy for very small devices that can only 
>communicate using HTTP.  Because of this I think that your uVMs,..

Yep.. I remember going through JXTA a while back and thinking about if I
wanted to put into into a uVM but decided HTTP with a proxy was the
better choice because I always thought there would have to be at least 1
'heavyweight' (relative to uVM) conduit into the real-world. Having a
JXTA proxy with the SLIP JAPL HTTP remoting stack we talked about before
is looking really interesting. Boy.. The more I get into it HTTP for uVM
with the Java Servlet container is really turning out to be a great
choice.. Very happy with the combination of applications that are coming
from it!


OK.. Hmm.. I am going to do a rapid think tank on this because I am
RIGHT NOW writing my muvium Bible 'Technology Evaluation' document that
encapsulates everything about muvium and the emerging connectivity
application space, heirachial java /outpost, generic user interfaces via
irda enabled PDA/MobilePhone/Gameboy browsers, WindowCE.NET
connectivity/Industrial control etc. Plus where and why muvium 'makes it
possible'

This document I have about 2 days before it has to hit the printers
before and will be placed into the hot little hands of 1000 world class
embedded engineers and many top Embedded companies, in a workshop think
tank environment and need to know what to 'sell'.. 

Could be good timing. (more good timing)

New Section: JXTA Emerges.

Ted, can you put together in as condensed a form as possible your best
language on why JXTA is great and why this is a great space for java to
help me build this new section in this what is turning out to be a very
powerful document on the future of java embedded application space.

More soon,

James Caska
www.muvium.com
uVM - 'Java Bred for Embedded'



-----Original Message-----
From: emb...@li...
[mailto:emb...@li...] On Behalf Of
Ted Kosan
Sent: Saturday, 5 July 2003 2:58 AM
To: emb...@li...
Subject: RE: [Embedlets-dev] Global Light Blinker Project proposal


Topic tags:[ARCH][JAPL][WIRING][DOCS][MGMT][STRATEGY][NEWBIE]
_______________________________________________

James wrote:

> Well done.. It's a very good point that you don't always hit the 
> target you are aiming for.. I am impressed that you have got so far as

> to have a manufacturer and working model which is driving your 
> confidence.

Hey, it did not take much selling either.  All I had to do was to tell
them that a person could securely control or monitor anything inside
their Home from out on the internet using a cell phone, any PC or even a
Web Browser and they just instantly 'got it'.



> I must admit I am not paying as much attention as I should be. So this

> idea is to allow Home automation meaning people can connect to their 
> homes webbrowser and turn lights on and off?

Close.  A webbrowser is not involved and the lights are just for the
proof of concept.  We can control anything in the home that can be
interfaced to.  All that is needed is to have one or more JXTA Peers
running inside of the house that are part of the person's personal
PeerGroup.  JXTA 2.0 has already implemented encrypted TLS (Transport
Layer Security) along with encrypted authentication for peer group
access and communications.  The JXTA groups has solved many of the tough
communications problems that we have been struggling with for the past
year.

Each JXTA peer in the peer group has a universal unique ID (UUID) which
means that we can give any device in the home a UUID and then monitor
and control it from anywhere in the world.  The really great thing is
that there is not central UUID authority and so anyone is free to create
as many UUIDs as they need.



> BTW - for the dummies.. What is NAT?

Network Address Translation.  It is the main mechanism used to extend
the present limited IPV4 address space by taking a routable IP address
and then serving non-routable 'dummy' IP addresses to devices in a
domain that then all share this one routable address.

In most people's homes (and probably in most business to) a NAT box
(like the one that an ISP cable company installs) will serve dummy
address to any device in the home that needs one and when the device
wants to go out to the internet it makes a request to the NAT box and
the NAT box places the dummy IP address, and the destination IP address,
in an intenal lookup table and then resends the request to the
destination IP address using the one routable IP address that it has.

When the response comes back the NAT box looks in its lookup table to
match the response to the request and then it resends the response to
the internal originating device using its dummy IP address.

The big problem with monitoring and controlling devices in the home up
to this point has been the following:  When an incoming IP packet comes
into the NAT box, and it was not the result of an outgoing request, then
there is no match in the NAT's lookup table and the message gets dumped
into the bit bucket.

JXTA 2.0 just solved this 'punching through the NAT' problem a couple of
months ago and so they have just opened the remote home device control
market wide open for anyone who knows both Java and Embedded systems.

BTW, JXTA also punches through firewalls...


James, it gets even better...  The JXME sub-project has also created
technology that allows a full JXTA peer to act as a proxy for very small
devices that can only communicate using HTTP.  Because of this I think
that your uVMs, along with all of the Systronix products, are in a
perfect position to fill this amazing market opportunity.


Ted

PS, I have just succeeded in creating an experimental GlobalLightBlinker
JXTA Peer Group and the next step is to write a small LightBlink test
application and build a lamp controller box (with the parts that came in
yesterday).  I have already lined up someone who has a NAT connection to
the internet in their home to test the box and as soon as everything is
ready I am going to jump on my bike and ride over there (probably at a
rate which is way over the speed limit ;-)

 

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