Re: [Roll] [roll] #163 (applicability-home-building): DAO Policy

[peter van der Stok <[e-mail]>]

HI Yvonne,

after some discussions we propose the following text, that you will 
easily recognize.

Nodes send DAO messages to establish
downward paths from the root to themselves. DAO messages are not
acknowledged in networks composed of battery operated field devices in
order to minimize the power consumption overhead associated with path
discovery. The DAO messages build up a source route because the nodes 
are recommended to be in non-storing mode.
If devices in LLNs participate in multiple RPL instances
and DODAGs, it is highly recommended that both the RPLInstance ID and
the DODAGID be included in the DAO.


many thanks,

Peter

roll issue tracker schreef op 2014-11-10 23:09:
> #163: DAO Policy
> 
>  Yvonne-Anne Pignolet:
>  In 4.1.3. The authors consider DAO policy to be
>  out of scope. However, if basic RPL is applicable for home and
>  building automation scenarios then due to P2MP traffic  from roots
>  DAOs are required. As in the industrial applicability statement I thus
>  recommend a paragraph such as "Nodes send DAO messages to establish
>  downward paths from the root to themselves. DAO messages are not
>  acknowledged in networks composed of battery operated field devices in
>  order to minimize the power consumption overhead associated with path
>  discovery.  If devices in LLNs participate in multiple RPL instances
>  and DODAGs, it is highly recommended that both the RPLInstance ID and
>  the DODAGID be included in the DAO."  If the mailing list consensus is
>  that P2P RPL is to be used only, then this Section should state that
>  DAO messages are not sent in this case. In addition a comment on
>  P2P-DRO  Acknowledgement (P2P-DRO-ACK) would be helpful
> 
>  Peter van der Stok:
>  Some text to motivate the out of scope of DAO policy can be added.
>  For the multiple RPL instances, I prefer to include a reference to 
> other
>  texts.