Yakusuki,
We currently assume that:
- we have no information about the generated traffic from the application
- we do not know which part of the incoming traffic is routed to which
neighbour.
Example: If a both a TX cell and a Shared cell are requested as incoming
to the node, we do not know to which neighbour these cells will be routed,
or if the incoming traffic destination is the node itself.
As a consequence, since the only true source of information is the effective
number of outgoing cells, our default behavior is to allocate dedicated TX
cells
to the specific neighbour.
I think the reason to use TX or Shared cells as a default, is covered by
Thomas' answer.
Thank you.
Regards,
Diego
2016-11-16 8:33 GMT-03:00 Yasuyuki Tanaka <yasuyuki9.tan...@toshiba.co.jp>:
> Hi Diego,
>
> diego> b) if we keep working with the initial assumption, and do not
> diego> allow any shared cells to be scheduled by SF0.
>
> Why is scheduling shared cells not allowed by the initial assumption?
> I'm a relative newcomer to 6TiSCH and not sure about the initial
> assumption...
>
> To me, it seems that scheduling shared cells is more sensible in
> Neighbor-to-Neighbor Scheduling than dedicated cells. I would say that
> the SHARED cell bit in the CellOptions field should be always on when
> the field is used for CMD_ADD.
>
> A pair of devices in a 6P conversation have no idea if cells they are
> scheduling are truly dedicated. In general, cells scheduled with 6P
> are possibly shared with multiple TX devices. In other words, I think
> it'd be better to always perform CCA on a cell scheduled with 6P.
>
> Best,
> Yatch
>
>
> On 2016/10/31 22:23, Prof. Diego Dujovne wrote:
>
>> Dear all,
>> SF0 has assumed until now that it was
>> only working on dedicated cells, but 6P now provides
>> the possibility to use shared cells.
>>
>> I would like to hear your thoughts on the
>> following alternatives:
>> a) if we allow shared cells to be used SF0, how to
>> establish a policy on which type of cells to allocate.
>> Currently, SF0 observes only the incoming number of
>> cell allocation requests and effectively used cells
>> to calculate the number of required cells.
>> b) if we keep working with the initial assumption, and
>> do not allow any shared cells to be scheduled by SF0.
>>
>> A quick solution would be to define two different instances
>> of SF0, one for shared cells and the other for dedicated
>> ones.
>> Regards,
>>
>> Diego
>>
>> --
>> DIEGO DUJOVNE
>> Profesor Asociado
>> Escuela de Informática y Telecomunicaciones
>> Facultad de Ingeniería - Universidad Diego Portales - Chile
>> www.ingenieria.udp.cl <http://www.ingenieria.udp.cl>
>> (56 2) 676 8125
>>
>>
>> _______________________________________________
>> 6tisch mailing list
>> 6tisch@ietf.org
>> https://www.ietf.org/mailman/listinfo/6tisch
>>
>>
>
--
DIEGO DUJOVNE
Profesor Asociado
Escuela de Informática y Telecomunicaciones
Facultad de Ingeniería - Universidad Diego Portales - Chile
www.ingenieria.udp.cl
(56 2) 676 8125
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