Marketing is in some ways a dirty business, but it other ways it is completely necessary. I do not intend to cheapen other peoples' work and research, but if I were not provocative this discussion would never have happened. When we began thinking about DASH7 in 2007, the first thing we started doing was market research. We did market research for three years. As a result, we are not using 802.15.4 + 6LowPAN as a foundation for DASH7.
The 6LowPAN stack is a fine set of technologies, but there is no focus. For US$2 embedded devices, focus matters. In our market research, it became very clear that only three elements of the IP-stack mattered [to our market]. They are: UDP, TCP, IPsec. Also, the market did not care at all about gateway vs. router. Practically -- and especially with 6LowPAN edge routers -- most "routers" today actually operate at layer 4. So we found no reason to re-implement IP at layer 3. Instead, we developed a completely different approach to layer 3 routing, we made sure IPsec could be integrated, and we made sure UDP and TCP-based applications could be used. Surely, this is not how everyone thinks -- some users will want special functionality from IP, and for those users 6LoWPAN is the clear answer. But for our market, all that matters are UDP, TCP, IPsec, so DASH7 is the clear answer. Best regards, JP Norair On 26 Jan 2012, at 09:49, Carsten Bormann wrote: > he whole point of running the 6LoWPAN WG for the last half-decade was to > exactly make IPv6 available for constrained node/networks. That may not take > away those constraints, and if you want to sell something else, it may make > sense to proclaim it silly. Here, specifically, the guy is selling a radio > that is different from 802.15.4, so he's trying to malign 802.15.4, striking > 6LoWPAN in passing. > > I would prefer to discuss these things from a technical angle, not by > pointing to content-free marketing sites/slides. > > Grüße, Carsten
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