Intraframe adjustment slotted random anti-collision algorithm for EPC Gen2 tags

In this paper, an Intraframe Adjustment Slotted Random (IFASR) algorithm for EPC Gen2 Protocol was presented. Two Slotted Random-redistribute instructions are introduced to make the collided tags randomly redistribute in the current or following slots and increase the response slot of other tags, which will lead to relative moderate slot distribution of tags, and then the probability of tag´s being identified would be increased. Simulation results shows that the proposed IFASR algorithm significantly improve the tag throughout by 30 per cent and the frame efficiency by 20 per cent compared with SR algorithm specified in EPC Gen2 Protocol. It is indicated that IFASR have better performance than SR algorithm by all appearances.