Re: [core] WG interest in Sleepy Node topic

Hi，Akbar，

I believe that sleepy node will affects the CoAP performance and functionalities when CoAP runs in smart phone. 
Smart phones of IOS’s, Android and WP have sleep mode, 
and that affects the existing mobile internet applications and mobile networks.

Samrt phones are ever used as SINK in sensor network, as a hub for merging data and processing, 
and as a proxy for accessing the Internet through Gprs, 3G or 4G in M2M networks. 

Smart phone plays a very important role in the applicatoins, the same as CoRE applications, that were developed two or three years ago. 
The typical cenario is that sensors send data to smart phone(s) and then the smart phone, as a proxy, delivers data to the service center in the Internet.
When the smart phone falls into sleep mode,  communications are affected apparently. 
Whereas PADs, notebooks are considered to replace the smart phone, as you know, all these mobile quipements have the sleep mode for sustaining a longer battery life.  

So, in CoRE like enviroments, we need to take care of sleep node.  

regards, 

Gengyu 

Network Technology Center
School of Computer
Beijing University of Posts & Telecommunications

From: Rahman, Akbar 
Sent: Friday, November 08, 2013 10:36 AM
To: Core 
Subject: [core] WG interest in Sleepy Node topic

Hi All,

Once again we ran out of time on the agenda to discuss the WG interest on the topic of Sleepy Nodes

http://www.ietf.org/id/draft-rahman-core-sleepy-nodes-do-we-need-00.txt

However, Carsten did suggest that we carry the discussion that we would have had in the meeting forward to the WG list.  The key questions that we need WG feedback on are:

1.       Does the WG want to keep discussing Sleepy Nodes in CORE?  The Sleepy Node support could be in:

a.       CoAP Protocol

b.      CORE Link Format

c.       CORE Resource Directory

d.      Etc.

2.       Sub-Question:

a.       Does the WG want to see some immediate development of the Mirror Server concept (which seems to have near unanimous support and is well correlated to Sleepy Node support)?

Any and all comments are appreciated!  Please write back even if you answered earlier Emails on this topic as we need to gauge WG interest.

Thanks,

Akbar

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