Abstract: The current large-scale smart group volume system uses ultra high frequency identification technology to complete the task scheduling,and commonly used scheduling backscattering coupling way is easy to have the conflict due to lack of time on communication.Therefore this paper presented a power control based on the improved frame time-slot anti-collision algorithm.In control,power is introduced as the basis of regulation,and according to the system dry ratio,read and write device independently regulates system itself transmitted power to guarantee time interval,first sends the query command to the label in the function area,records total labels in the area,makes signal grouping its description,ensures the distance of reading and writing,at the same time decreases the complex degree of the coverage area.Experiments show that this method can ensure that signal multifarious minimize signal coverage area,enhance anti-collision performance of smart group volume system,and is an effective conflict resolution method of smart group vo-lume system.

Key words: Smart group volume system,Anti-collision algorithm,Dry ratio,Power control,Frame time slot