一种WSN中的差错控制方案

Error Control Scheme in Wireless Sensor Networks

针对WSN中信息传输误码率高和能量受限的特点,提出了一种BCH(63,36)+二次CRC-16的差错控制方案。方案以信息分组为单位分别进行CRC和BCH编码,仅对CRC校验发现错误的分组进行译码纠错,大大增强了译码的针对性。BCH(63,36)+二次CRC-16可以纠正至多5位的突发错误和随机错误,且纠错后再次校验,增强了接收信息的准确性。实验结果表明,该方案具有较高的能量效率,且有效降低了误码率。

Aiming at the character of high bit error rate and energy constraints on WSN,this paper proposes an error control scheme based on BCH（63,36）twice CRC-16.The scheme encodes CRC and BCH in unit of information blocks separately,and decodes merely focused on blocks containing errors.By doing this,it can improve the pertinence of BCH decoding.BCH（63,36） twice CRC-16 can correct no more than 5 bits burst error or random error,and the second CRC check after error correcting improved the accuracy of received information.Experimental results show the scheme is high in energy efficiency,meanwhile,it drops the bit error rate effectively.