Energy efficiency is the primary consideration of the design of error control protocol of WSN and energy efficiency analysis is the key point of the present related literature research. However, while emphasizes are on the theoretical analysis and experiments are simulated by advanced programming language such as Matlab、C++ and so on, definitions of some restrictive or operation systems on hardware side of sensor nodes in practical usage are neglected, which lead to the inaccurate conclusion of the error control energy efficiency analysis. In this paper, samples of package-loss and error package and distribution of error codes in error packages are obtained through experiment statistics of a large amount of entity nodes and energy efficiency analysis and comparison of Error Control Techniques of WSN are conducted based on error characteristics.
Aiming at the character of high bit error rate and energy constraints on WSN, this paper proposed an adaptive error control scheme based on link quality indicator(LQI). The PHY specification of IEEE802.15.4 provided accurate measurement of channel quality for WSN, according to the quantitative relationship between LQI and bit error rate, this paper divided the channel quality into eight levels non-uniformly, furthermore, eight different BCH code were chosen correspondingly. The motes choose optimal BCH code as its error correction scheme in real time. Experimental results show the scheme is high in energy efficiency, meanwhile, drops the error probability effectively.
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