| 摘要: |
| 为解决目前现有电子标签防碰撞算法在电子标签数量较大时，读取效率低且耗时较长的问题，提出了一种基于二元指数后退的时隙选择算法，当碰撞发生时，改进算法以二进制指数方式进行时隙的增加，并随机选择时隙发送数据，重复这个过程直到所有标签被正确读出。仿真试验表明，在电子标签数量急剧增加时，改进算法的读取效率较高，电子标签读取所需时隙基本不增加。 |
| 关键词: RFID ALOHA 时隙 二元指数后退 |
| DOI： |
| 分类号:TB487; TP393 |
| 基金项目:国家自然科学基金资助项目（21007051）； 西南大学青年基金资助项目（2010RCQ003） |
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| Anti-collision Algorithm of Electronic Tag Based on Binary Exponential Backoff |
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HU Da-hui, DU Zhi-guo
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Southwest University, Chongqing 402460, China
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| Abstract: |
| A time slot selection algorithm based on binary exponential backoff was put forward to solve the low reading efficiency and time consuming problems of existing electronic tag anti-collision algorithms under heavy reading load. When a collision occurs, the proposed algorithm increases the time slot to the binary exponential and randomly selects a time slot to send data, and repeat this process until all the RFID are read correctly. The simulation results showed that a sharp increase in the number of electronic tags, the higher the reading efficiency of the algorithm and with little increase of data access time. |
| Key words: RFID ALOHA time slot binary exponential backoff |
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