On Jul 20, 2006, at 8:05 PM, Samita Chakrabarti wrote:
On 7/20/06, Philip Levis <[EMAIL PROTECTED]> wrote:
You can totally write an IP stack -- even a TCP stack -- on sensor
nodes today, admittedly the ones that have the biggest
microcontrollers you can buy (atmega128L, MSP430F1611, etc.). The TCP
stack might not have a lot of RAM for windowing and high performance,
but that's rarely the goal. You can do it.
I don't think the requirements the document implies are unrealistic
or onerous. As I said, you have to cut the line somewhere. My comment
was just that they *do* preclude smaller nodes whose storage cannot
hold a complete IPv6 packet, and it might be useful to note as such,
since the document is defining the problem statement, and therefore
the problem scope.
Your point is valid. Though IMHO, drawing a strict line on non-
applicability
on low RAM devices may not be wise.
Of course; it would be counter-productive for the document to say
"this means IPv6 cannot be implemented on hardware XYZ," as the
future and some interesting techniques might show such a hard
statement to be wrong. Rather, something such as "IPv6's requirement
of sub-IP reassembly may pose challenges for low-end LowPAN devices
that do not have enough RAM or storage for a 1280-octet packet."
But anyways. Sounds like I've beaten this horse to death.
Phil
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