Integration Retrieval of History Data and Sensing Information Using SGLN Code in Extended RFID Application

The current logistics system is constructed considering only one environment. For example, if the tag is attached to the item, the user can manage only historical data of the item. However, the user demands various kinds of data such as location data or condition data of item, it is impossible for the existing system to process this kind of data. Due to the various requirements of the user, the logistic environment becoming complicated and various devices will be needed from processing complicated logistics environment. For example, GPS device is used for getting outdoor location information of item and Passive Tag is used for getting indoor location information. Also, sensor node or sensor tag is used for sensing condition of item or surroundings. However, when the user queries the system, the tables of the data created from various devices must be joined. In this time, because of join, the problem of performance can occur. For solving this problem, this paper proposes method that agrees with the representations of join field using SGLN code.