Research of anti-collision algorithm in underground mine personnel tracking system

In order to avoid signal collision occurs when more than one tag send the recognition information to the reader with function of personnel tracking system in mine,slotted ALOHA algorithm based on the idea of grouping is proposed.In this algorithm,the reader selects partial tags among the waiting tags to read,so the probability of collision reduces grately.The results of simulation proves that this algorithm can resolve the problem of collision of many tags.