- Conor
On 7/25/06, Munaretto, Daniel <[EMAIL PROTECTED]> wrote:
So what you mean is in tinyos-1.x is impossible to bypass this problem, isn'it?
Or if there is a solution in 1.x, in my project would be really important, should you explain it?
Thanks very much,
Cheers
Daniele
-----Original Message-----
From: Philip Levis [mailto: [EMAIL PROTECTED]]
Sent: Tue 7/25/2006 7:33 AM
To: José Ulloa
Cc: Tinyos-help@Millennium.Berkeley.EDU
Subject: Re: [Tinyos-help] Question about lost of packets with MultiHop.
On Jul 24, 2006, at 1:21 PM, José Ulloa wrote:
> Hi, we are working with a network with six or more hops, and
> tinyos-1.x. We have detected a lost of packet in a node, after
> receiving the packet and sending the corresponding ACK.
> ¿is this posible because the radio had two packet in the RXFIFO in
> the moment of read?
> I understand, when tinyos-1.x reads the first packet, the second
> will be descarted by the call of flushRXFIFO from the CC2420RadioM
> component. ¿is this really happening? ¿someone knows a solution for
> this?
Yes, this is really happening. It's a fairly nasty issue in the 1.x
stack. The TinyOS 2.0 stack doesn't have this issue; it keeps track
of packets in the FIFO and spools them out one by one. If a packet
can't fit in the FIFO, then the radio doesn't acknowledge it.
Phil
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