As an important data acquisition technology

throughput of RFID system affects performance of the data acquisition terminal of Internet of Things directly

but the throughputs of passive RFID system anti-collision algorithms of framed slot are generally low.Two factors influencing throughput of RFID systems are analyzed

which were frame length and the way of solving collided slots.Mathematical models of frame adjusting and tag collision are set up and solved

and then a solution is proposed for optimizing the anti-collision ALOHA algorithms of framed slot

that is

frame length adjusting adaptively and collision binary splitting timely.On these bases

the adaptive binary splitting frame slotted ALOHA anti-collision is constructed.The simulation results show that ABSFSA algorithm is able to decrease the invalid slots effectively in the same condition

and the throughput of RFID system is steadily improved to 45% obviously.The research work provides a referable mathematical model for optimizing the anti-collision ALOHA algorithms of framed slot

and a valuable solution for improving performance of data acquisition terminal of Internet of Things.