Re: [lp-wan] need for MAX_ACK_REQUESTS?

["Carles Gomez Montenegro" <[e-mail]>]

Hi Arun,

Thanks for commenting on this.

Currently, MAX_ACK_REQUESTS applies only to the last fragment in a window,
which can be viewed also as an "ACK request". MAX_FRAG_RETRIES applies to
the previous fragments in the window.

I have been thinking about this several times, and I see two options:

1.- Keep the two parameters. There might be reasons for setting
MAX_ACK_REQUESTS to a higher value than MAX_FRAG_RETRIES. It may be
specially critical to get an ACK (which gives feedback on the delivery of
all fragments in the window), while one might want to be careful regarding
how many times a fragment (from the rest of fragments in the window) is
resent. In addition, it is possible to set the two parameters to the same
value if desired.

2.- Remove MAX_ACK_REQUESTS and have just MAX_FRAG_RETRIES applying to all
fragments.

Which are your (and other) opinions on this?

Thanks,

Carles



> Hi Carles, all,
>
>  Do we still need this variable MAX_ACK_REQUESTS ?
>  MAX_FRAG_RETRIES is going to be the same (during retransmission we only
> send the last fragment of the received bitmap which would be considered
> as ACK REQUEST). correct?
>
>  if this is already discussed in the thread of Dominique's review please
> point me to the same.
>
> thanks,
>
> --
>
> Arunprabhu Kandasamy
> arun at ackl.io