Thanks,Eric.
It seems the authors use the CC1000 in the paper,not CC2420.
According to code of CC1000,it is possible to receive/transmit preamble
manually,even making preamble error tolerant(which they really did in the
paper)．Intresting.
I should have checked the paper more carefully :)
Best regards,
Jie Yu
------------------ 原始邮件 ------------------
发件人: "Eric Decker";
发送时间: 2014年6月17日(星期二) 凌晨1:33
收件人: "俞杰";
抄送: "tinyos-help";
主题: Re: [Tinyos-help] read and configure the content of preamble
I found the paper.
And it doesn't look like they are tweaking what they send. Rather they are
looking at multiple copies of the same packet. And there is a special parity
packet that they send (additional overhead, but there really isn't such thing
as a free lunch).
I'm not sure what they are doing with the preamble. Typically one doesn't get
the preamble out of the 2420.
On Mon, Jun 16, 2014 at 10:28 AM, Eric Decker <cire...@gmail.com> wrote:
I am not aware of anyway using the cc2420 h/w to get access to manipulating the
preamble.
So I would say no it isn't possible.
Can you send me a copy of the paper "Packet Combining in Sensor Networks" and
I'll see if I can figure out what they were doing.
On Mon, Jun 16, 2014 at 7:31 AM, 俞杰 <never...@gmail.com> wrote:
Hello everyone,
I've recently read a paper called "Packet Combining in Sensor
Networks(SenSys'05)" which relates to error correction.
What confuses me is the operations they did to preamble.
In the experiment they did ,"the received preamble was also dumped out along
with each packet".
And in the implementation , " we embed the type of each packet(parity or plain)
in the preamble so that it does not require additional bits."
It seems that we can read and define the content of preamble in tinyos .
But when I check the CC2420 datasheet , it says
"the preamble and start of frame delimiter are generated by hardware"(p17 of
85),
"the preamble sequence is defined to be 4 bytes of 0x00" and "the preamble
length and SFD is configurable"(p36)
It never says the content of preamble is configurable!
So my question is :
Is it possible to read or configure the content of preamble in CC2420 based
radio?And if possible,how?
Best regards,
Jay
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Eric B. Decker
Senior (over 50 :-) Researcher
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Eric B. Decker
Senior (over 50 :-) Researcher
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