Hi Avinash,
Low power listening have not sense using CC2420 because
this chip is compliant with the standard IEEE 802.15.4. This standard defines a
4 bytes preamble length and LPL needs a long preamble in order to work properly.
The CC1000 is not compliant with 802.15.4 and allows you to change the
preamble length. When you send a packet using LPL, a long preamble is
transmitted. The recipient of the packet is idle and periodically it scans the
channel to look for a packet. If the preamble and the period are adapted, the
recipient can receive the useful information of the packet.
Best
regards,
Diego
De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] En nombre de Avinash Sridharan
Enviado el: miércoles, 13 de septiembre de 2006 2:35
Para: tos
Asunto: [Tinyos-help] low power listening in tinyos-2.x for CC2420 ?
I am working with the tmote sky platform and running tinyos-2.x (beta 2) on it. I wanted to check with the community if there is low power listening support existing for CC2420 based platforms in tinyos-2.x. Low power listening was introduced as BMAC by Joe Polaster in tinyos-1.x for the CC1000 chips, but I could not find reference implementations of BMAC for CC2420 in tinyOS-2.x. Also if BMAC is not available for tinyOS-2.x (atleast in the near future) is it available as part of the Boomerang distribution.
Thanks,
Avinash
--
Phd Dept. of Electrical Engineering
University of Southern California
http://www-scf.usc.edu/~asridhar
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