Hi,
I had already posted the below query but no one had responded (except
to the first query which I've removed), so I'm resending it.
I was thinking of a making a simple modification to the
> MultiHopEngineM.nc module for my project. I basically want to buffer data
> packets, both forwarded and originated, when the parent fails and keep them
> buffered till a new parent is found.
>
> However, I'm not sure what the MultiHopEngine is currently doing.
>
> Suppose I send a packet and sendDone() is signalled for it. Thus
> iFwdBufTail moves at the same pace as iFwdBufHead. However, if I send a
> packet (packet 'X') and its sendDone() is not signalled and another packet
> (packet 'Y') is send in the interim i.e. iFwdBufHead is now two paces ahead
> of iFwdBufTail (obviously % FWD_QUEUE_SIZE), even if 'packet Y's' sendDone()
> is signalled, it won't be removed from buffer i.e iFwdBufTail won't be
> incremented. Thus all packets after 'packet X' will keep getting buffered
> even though their sendDone() has been signalled. Finally, say I receive
> packet X's sendDone() signal in which case iFwdBufTail gets incremented,
> however what about packet Y onwards since their sendDone() has been missed?
> Won't the queue be wrongly assumed full?
>
> Please point out where I'm going wrong.
>
Thanks,
Bharat Naik.
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