[Tinyos-help] about 802.15.4 ack

[Razvan Musaloiu-E.]

Hi!

On Tue, 28 Apr 2009, 6lowpan wrote:

> Hi everyone.
>
> In 802.15.4,when a receiver receives a frame from a sender ,it will send
> back an ack.If the sender fails to receiver the ack,it will send the frame
> with the same sequence number again.

The retransmission happens only if the PACKET_LINK is enabled.

> I can not find how the receiver handles this frame in the document.Does it
> discard it or process it once more?

The code is in tinyos-2.x/tos/chips/cc2420/packet.

All the best!
Razvan ME