CAJ | 학술논문

为解决射频识别系统中的标签防碰撞问题,在基于位竞争算法的基础上提出一种改进的防碰撞算法( IBCA)。改进的算法首先加入锁位机制,使阅读器通过锁位的方法将标签的碰撞比特位提取出来,之后和标签仅通信这些碰撞位,再按位进行“或”运算。然后再通过设置堆栈,使得每次识别完一个标签后返回上一个碰撞位。算法考虑了碰撞时隙数和阅读器问询次数两个性能指标,仿真结果表明,IBCA算法较BCA算法性能有很大提高。
위해결사빈식별계통중적표첨방팽당문제,재기우위경쟁산법적기출상제출일충개진적방팽당산법( IBCA)。개진적산법수선가입쇄위궤제,사열독기통과쇄위적방법장표첨적팽당비특위제취출래,지후화표첨부통신저사팽당위,재안위진행“혹”운산。연후재통과설치퇴잔,사득매차식별완일개표첨후반회상일개팽당위。산법고필료팽당시극수화열독기문순차수량개성능지표,방진결과표명,IBCA산법교BCA산법성능유흔대제고。
The improved bit-competition algorithm ( IBCA) based on BCA algorithm is proposed to solve the problem of tag collision in RFID system. Firstly, bit-locking mechanism is introduced into the im-proved algorithm ,thus the readers could extract collision bits among tags via bit-locking method. Then on-ly the collision bits are communicated and OR operations done by bit. The improved algorithm makes the tag get back to the pervious collision bit via setting a stack after identifying a tag. This algorithm takes number of collision slot and times of the request into account. Simulation results indicate that this IBCA al-gorithm is highly improved in performance as compared with BCA algorithm.