| Conference |
| Type of Publication |
| The Impact of Forward Error Correction on Wireless Sensor
Network Performance |
| Title |
|
|
| Authors |
| Proc. of ACM Workshop on Real-World Wireless Sensor
Networks (RealWSN'06), Uppsala, Sweden, June 2006 |
| Published in |
| In networks there are basically two methods
to tackle the problem of erroneous packets: Automatic Repeat
Requests (ARQ) and Forward Error Correction (FEC). While ARQ
means packet retransmissions, FEC uses additional bits to detect
and correct distorted data. However, extensive field tests of our
sensor nodes have shown that FEC can take effect only as long as
both sender and receiver are bit-wise synchronized. Otherwise,
all following bits are misinterpreted which results in an
uncorrectable number of errors. We will thus introduce a new
resync scheme which is particularly tailored for many sensor
network platforms using UARTs in conjunction with radio
transmission. We then evaluate three FEC codes, a
single-error-correcting and double-error-correcting code, and a
Reed Solomon code. Byte interleaving is used to spread burst
errors and in doing so further improves the packet reception
rate. We also show that for our sensor note platform only using
an appropriate resync mechanism exploits the full potential of
FEC. |
| Abstract |
|
Forward Error Correction
Resync
UART
Wireless Sensor Networks
|
| Keywords |
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