Subject: Re: [core] CoAP observe: tokens and lifetime

From: Cullen Jennings <[email-masked]>
Date: Wed, 2 Mar 2011 14:58:03 -0700

On Feb 19, 2011, at 8:02 AM, Carsten Bormann wrote:

> One thing we have learned from SIP (learned HARD) is that coupling reliability sublayer timing to application sublayer timing is *not* a good idea. (Essentially, SIP on UDP is all but deprecated at this point.) 
Uh, my comment is a bit off topic and probably does not bear on the current discussions much but SIP over UDP is certainly not anything like deprecated at this point - it is widely used and more widely implemented than any other transport for SIP. It separates the application timing form the reliability sublayer - there are different timers.