[Tinyos-help] ACK in broadcast for CC2420LPL????

[David Moss]

Although I believe 802.15.4 says broadcast packets can be ack'd (to tell
your transmitter that at least one other node received the packet), LPL
disables PacketAcknowledgements before transmitting to the broadcast
address.  Ignoring acknowledgements, this allows it to deliver the broadcast
packet for a full receive check period, allowing all receivers in the area
to detect and receive the packet.

-David



-----Original Message-----
From: tinyos-help-bounces at Millennium.Berkeley.EDU
[mailto:tinyos-help-bounces at Millennium.Berkeley.EDU] On Behalf Of Ravi
Prasad
Sent: Sunday, August 12, 2007 8:12 PM
To: tinyos-help at Millennium.Berkeley.EDU
Subject: [Tinyos-help] ACK in broadcast for CC2420LPL????


Hi,

Can anybody comment on how does ACK mechanism work if
a packet is broadcasted rather then Unicasted?

CC2420LPL waits for ACK after sending a packet. After
receiving ACK it goes to sleep again. In Unicast mode
it can wait for ACK from the destination specified in
the sent packet. But what will happen if packet is
sent to Broadcast Address??


Regards
Ravi


 
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