[Tinyos-help] cc2420 packet size

[salvatore galati]

HI all.
I'm a student an i'm working on WSN with TinyOs 2.x.

I want to calculate the transmit time for a radio packet with cc2420 radio
stack ( i'm using TmoteSky motes)

I need the correct packet size for the radio packet....

i think it is:

PREAMBLE (5 bytes) + cc2420 header ( 11 bytes) + payload_data_lenght (28
bytes ) +  CRC (2 bytes)  ====> total 46 bytes

I'm correct?

If the radio packet size is correct ----> so the transmit time for a packet
in Tmotesky mote ( baud rate 115200Kbit/sec ) without congestion backoff and
tx7rx backoff must be

(46*8) / 115200  0,0032 seconds = 3,2 milliseconds....

I'm correct?


thanks a lot for your answers.

bye
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.millennium.berkeley.edu/pipermail/tinyos-help/attachments/20080527/23a1c107/attachment.htm