Transaction Processing for Complete Reading of Semi-passive Sensor Tag

This paper deals with the problem of incomplete reading of sensing value stored in the semi-passive sensor tag and proposes a mechanism for complete reading without losing sensed value. The Cold Chain management system requires complete retrieval of a sensed data to keep track of freshness goods. However, reading the sensed data would be interfered by RF environment such as a jamming, obstacle and so on. This study found that interference could lead to loss of the sensed data. To solve this problem, we propose the transaction processing mechanism that guarantees complete reading of the sensed data. To do this, we present dynamic resizing of packet and recovery mechanism for complete reading of tag data to execute read transaction. These techniques improve the reliability of reading operation as well as speeds up of reading the mass data. The major contribution of this paper is to provide complete mechanism for reading a sensed data completely without any loss of a data from semi-passive sensor tag.