Re: iOS IMAP IDLE (Standard "Push Email") Deficiency, Explanation?

LEMONADE is beyond finished. What is to wait for?

On Oct 5, 2010, at 9:13 AM, Martin Konold wrote:

> Am Montag 04 Oktober 2010, 19:18:22 schrieb Sabahattin Gucukoglu:
> 
> Hi,
> 
> Well,  Steve Jobs is partly correct. (I avoided bothering him with my 
> response)
> 
> On one hand IMAP IDLE has absolute minimal requirements with regards to 
> protocol complexity which helps preserving power.
> 
> On the other hand IMAP IDLE is so limited in features that it has also 
> negative effects on resource usage including user experience and power 
> consumption.
> 
> 1. IMAP IDLE can only monitor a single folder. Using multiple connections in 
> order to circumvent this limitation is inefficient.
> 
> -->3 years ago I drafted an RFC which tries to solve this issue while 
> remaining simple. 
> 
> http://www.erfrakon.de/konold/draft-konold-imap-idleplus-05.txt
> 
> 2. IMAP IDLE lacks support for non mail folders e.g. clients are interested in 
> watching calendars, addressbooks, todos etc.
> 
> --> I tired successfully with warpping these groupware related objects as XML 
> objects within imap messages  (Kolab architecture)
> 
> http://kolab.org/doc/concept-draft-cvs20060921.pdf
> 
> 3. IMAP IDLE requires a permanent stateful TCP connection and has no support 
> for efficient reconnects. This means that clients cannot switch off the IP 
> stack in order to preserve power and that loss of connection leads to extra 
> bandwidth and processing requirements. This is not only bad for mobile 
> clients.
> 
> All the above issues are tried to be addressed by the LEMONADE group e.g.  
> IMAP CONDSTORE.
> 
> http://www.lemonadeformobiles.com/quick.html and 
> http://datatracker.ietf.org/wg/lemonade/charter/
> 
> I am personally not really happy about the technical approach and progress 
> sofar but I have been told by others who know much better than me to stop my 
> above efforts and wait patiently for the results of the LEMONADE group.
> 
> Yours,
> -- martin
> 
> -- 
> e r f r a k o n
> Erlewein, Frank, Konold & Partner - Beratende Ingenieure und Physiker
> Sitz: Adolfstraße 23, 70469 Stuttgart, Partnerschaftsregister Stuttgart PR 126
> http://www.erfrakon.com/
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