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ISO18000-6C协议采用时槽ALOHA算法解决多标签识别时产生的碰撞问题,可同时识别多个标签,协议中的Q值决定了解决碰撞时所用的时槽数。时槽数越多,标签越不容易碰撞,但识别时间却越长,因此,动态改变Q值可以在标签识别时间和识别标签数之间找到最佳点。在复杂环境下,采用多天线,并结合动态Q值算法,可提高多标签识别率,解决多标签识别效率和漏读率的问题。在多标签盘点过程中,利用Session参数来过渡天线间切换,使识别过的标签不会被下一个天线识别。仿真分析了这种多天线盘点多标签流程的性能。
The ISO18000-6C protocol adopts the time slot ALOHA algorithm to solve the collision problem caused by multi-label recognition, and can simultaneously identify multiple labels. The Q value in the protocol determines the number of time slots used to solve the collision. The more the number of slots, the less likely the tag is to collide, but the longer the recognition time. Therefore, dynamically changing the Q value can find the best point between the tag identification time and the number of identification tags. In complex environment, using multiple antennas, combined with dynamic Q-value algorithm, can improve the multi-label recognition rate, multi-label recognition efficiency and missed read rate problems. In the multi-label inventory process, the use of Session parameters to transition between the antenna switch, so that the tag will not be recognized by the next antenna recognition. The performance of this multi-antenna inventory multi-label process is simulated and analyzed.