Re: [6tsch] Dynamic slot activation (was part of the 4th control flow)

[Xavier Vilajosana Guillen <[e-mail]>]

ok, I like it. If there is no objection I will change the name to minimal
6TiSCH

cheers.
Xavi



On Thu, Aug 29, 2013 at 12:52 PM, Thomas Watteyne <
[e-mail]> wrote:

> Of course!
>
>
> On Thu, Aug 29, 2013 at 12:11 PM, Qin Wang <[e-mail]> wrote:
>
>> Can we just call it "minimal 6TiSCH", instead of "minimal 6TiSCH
>> configuration"?
>>
>> Qin
>>
>>
>> On Fri, Aug 30, 2013 at 2:41 AM, Thomas Watteyne <
>> [e-mail]> wrote:
>>
>>> +1
>>>
>>> Rather than "basic", let's talk about "minimal 6TiSCH Configuration",
>>> i.e. the title of the draft.
>>>
>>> Xavi agreed a couple of calls ago to rename
>>> "draft-vilajosana-6tsch-basic" to "draft-vilajosana-6tisch-minimal"
>>>
>>> Thomas
>>>
>>>
>>> On Thu, Aug 29, 2013 at 2:16 AM, Pascal Thubert (pthubert) <
>>> [e-mail]> wrote:
>>>
>>>>  Hello Xavi and Qin:****
>>>>
>>>> ** **
>>>>
>>>> I’m not sure we want  to continue this discussion now or keep it for
>>>> later, but either way I’m making it a separate thread to save the current
>>>> conclusions.****
>>>>
>>>> ** **
>>>>
>>>> In short, Thomas below asked:****
>>>>
>>>> ** **
>>>>
>>>> *Thomas> over what cells with the reports travel? Another questions
>>>> could be: over what cells will the request to install cells travel?*
>>>>
>>>> ** **
>>>>
>>>> This is a good question and at the same time this is not really
>>>> something that we have to answer right now, per our proposed charter, as
>>>> Xavi indicates:****
>>>>
>>>> *Xavi> I think it is better first to concentrate on the basic things*
>>>>
>>>> ** **
>>>>
>>>> On the side I think the use of the word ‘basic’ these days could create
>>>> confusion since it seems to refer to draft-vilajosana-6tsch-basic which is
>>>> probably not Xavi’s intention here.****
>>>>
>>>> I’d suggest that when we refer to the operation in the
>>>> draft-vilajosana-6tsch-basic draft, we call it something like “Basic
>>>> 6TiSCH” or “Basic 6TiSCH Support” so the use of the plain word “basic” may
>>>> not be confusing anymore.****
>>>>
>>>> ** **
>>>>
>>>> For this particular thread, I suggested as an answer to Thomas that 1)
>>>> I agree that in the future the control flows could travel over a Basic
>>>> 6TiSCH instance, and in that case 2) that we could probably handle
>>>> burstiness of control traffic by overprovisioning time slots and then
>>>> indicating dynamically which extra time slots are being used; as Qin puts
>>>> it very clearly:****
>>>>
>>>> *Qin> Over-provision can increase the throughput at peak time, while
>>>> the control bits can reduce the energy consumption for idle-listening (at
>>>> least at the beginning of slot) in those unused Tx/Rx cells.*
>>>>
>>>> I was thinking of something like a ‘more’ bit in a cell the is being
>>>> used in order to tell listeners to wake up in the next overprovisionned
>>>> cell, as opposed to a bit sent at the beginning of the overprovisionned
>>>> cell that would indicate that the cell is not being used, though. Xavi
>>>> agrees that it *Xavi> sounds to me a great idea*****
>>>>
>>>> ** **
>>>>
>>>> To make sure that we do not make a confusion between 1) the bits that
>>>> control the use of overprovisionned cells in a bundle and that are pigy
>>>> backed with the traffic to indicate there is more trafficoutstanding and 2)
>>>> the end to end protocol that controls the allocation of cells between a
>>>> controlling entity and the device, or between devices, JP insisted that the
>>>> control flows for the latter (which are the subject of the original thread
>>>> by Qin) should be cleanly defined and that we should not expect to piggy
>>>> back them with traffic:****
>>>>
>>>> *JP> I would just be vary cautious when thinking of piggybacking
>>>> control information in packet header for control plane purpose***
>>>>
>>>> ** **
>>>>
>>>> With this summary, it is up to us to continue the discussion or save it
>>>> for later. Should we continue, I suggest we do it in the context of Basic
>>>> 6TiSCH to see if that mode could benefit from over-provisioned time slots
>>>> but then provide a way to use only a subset of those slots. This would
>>>> probably make Basic 6TiSCH a lot more useful in the future for applications
>>>> of various scales and degrees of burstiness.****
>>>>
>>>> ** **
>>>>
>>>> Cheers,****
>>>>
>>>> ** **
>>>>
>>>> Pascal****
>>>>
>>>
>>>
>>
>