Re: [Roll] Loop free local DODAG repair solution

[Jianlin Guo <[e-mail]>]

Hi Michael,

For your first question, draft-clausen-lln-rpl-experiences-04 pointed 
out that "it can be observed that with current implementations of RPL, 
such as the ContikiRPL implementation, loops do occur - and, frequently. 
During the same experiments described in Section 13, a snapshot of the 
DODAG was made every ten seconds. In 74.14% of the 4114 snapshots, at 
least one loop was observed".

For your second question, further investigation and experiments are needed.

Jianlin

On 10/25/2012 8:08 AM, Michael Richardson wrote:
> Jianlin Guo <[e-mail]> wrote:
>      JG> Dear ROLL WG members,
>
>      JG> As we all know that loop is an open issue in RPL. Experiment shows that loop
>      JG> occurs quite often. We have proposed a loop free local DODAG
>
> Can you quantify "quite often"?
> Do you have any metrics for how often loops occur, and what the cost is
> of their repair?
>
> I think that the WG would be very very very interested in additional -experiences
> draft, or pointers to papers explaining same, that gives a repeateable
> experiment in which loops are observed.
>