Faster channel allocation by relaxing the threshold of the terminal judgment of DCRO control and reducing the number of initial calibrations in backscatter synchronous streaming protocols

Abstract

Recently, multi-point synchronous sensing, which is used for structural health monitoring, is desirable to allocate channels to many sensor tags in a short time. In this study, we have proposed an approach for accelerating channel allocation in the synchronous streaming protocol. A sensor tag uses subcarrier frequency for backscatter communication. The sensor tag requires recursive calibration of the subcarrier frequency due to the instability of the subcarrier frequency oscillator inside the tag’s circuit. We have demonstrated that recursive calibration of subcarrier frequency is a dominant factor in channel allocation time. Furthermore, we found that by combining the reduction of initial calibrations and threshold’s relaxation for terminal judgment. as well as its quantitative evaluation, Experimental evaluation shows that the proposed approach can accelerate channel allocation by up to 43% compared with existing approach.