[Tinyos-help] CRC check succeeds but the packet is corrupted

Michael Schippling schip at santafe.edu
Thu Sep 8 10:36:48 PDT 2005


If I was able to do statistics I could calculate the probablility
of having a randomly matching CRC, it's 264 message bits and 16 crc
bits ....but I would be willing to bet that it would be in the range
that you have reported.

MS

Hongwei Zhang wrote:
> I saw similar issues in TOSSIM. We have seen this issue in field 
> deployment too, but less frequently.
> 
> Hongwei
> 
> 
> 
> Sumit Rangwala wrote:
> 
>>Hi, 
>>   During very high traffic in the network I am finding 
>>instances when the link layer CRC check succeeds but 
>>data in the packet is corrupted. 
>>  
>>Theoretically CRC cannot detect all bit errors but I was 
>>wondering if others have observed the same. I see such kind 
>>of error once every 50,000 packet (this number could be off 
>>by a factor of 2)
>>
>>I am using Tmotes.
>>
>>
>>Thanks,
>>Sumit 
>>
>>  
>>
> 
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