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Re: [6lowapp] draft-shelby-6lowapp-coap-00

Behcet Sarikaya <behcetsarikaya@yahoo.com> Tue, 26 January 2010 19:22 UTC

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Date: Tue, 26 Jan 2010 11:22:59 -0800
From: Behcet Sarikaya <behcetsarikaya@yahoo.com>
To: Zach Shelby <zach@sensinode.com>, d.sturek@att.net
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Cc: 6LoWAPP <6lowapp@ietf.org>
Subject: Re: [6lowapp] draft-shelby-6lowapp-coap-00
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----- Original Message ----
> From: Zach Shelby <zach@sensinode.com>
> To: d.sturek@att.net
> Cc: 6LoWAPP <6lowapp@ietf.org>
> Sent: Tue, January 26, 2010 8:46:31 AM
> Subject: Re: [6lowapp] draft-shelby-6lowapp-coap-00
> 
> 
> On Jan 26, 2010, at 15:43 , Don Sturek wrote:
> 
> > Hi Zach,
> > 
> > I agree we need to keep CoAp a simple REST implementation.  Reviewing DPWS
> > and other OASIS protocols is fine as long as we keep CoAp simple.  
> > 
> > We have done our job correctly if something like DPWS over CoAp becomes a
> > reality and we haven't if we find CoAp now is an annex of the OASIS WS
> > specifications.
> 
> Exactly. CoAP's goal is to support very light-weight RESTful interactions for 
> constrained device environments. Just as HTTP can be used for WS purposes, CoAP 
> should also be useful. There are a bunch of shortcomings in HTTP such as the 
> lack of multicast and subscribe/notify - by fixing those in CoAP will enable 
> simple REST applications, which also benefits use for e.g. DPWS or other WS-* if 
> they so wish to bind to CoAP.

I agree that application layer multicast is better for constrained device environments as IP multicast would be too costly.

Regards,

Behcet

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