Design and Implementation of Heterogeneous Internet of Things Identifier Recognition System

In Internet of Things (IoT), both physical things (such as devices, gateways and commodities etc.) and virtual things (like multimedia content and application software) are assigned unique IoT identifiers (IoT ID), which are similar to the domain name used for locating online resources in Internet. However, until now the format of IoT ID is not globally unified due to all kinds of reasons and thus in the IoT world there are even thousands of types of IoT ID (such as EPC code in USA, uCode in Japan, CPC code in China etc.). Due to the heterogeneity of IoT ID, it becomes the key point of resolving an IoT ID to the information referring to it (just as resolving the domain name to IP address) to at first determine the standard that the given IoT ID belongs to. Towards this issue, an extraction mechanism of IoT ID characteristic is proposed where three kinds of IoT ID characteristics, namely length, value range and special algorithm, are captured from the IoT ID standards. Based on these IoT ID characteristics, a fast IoT ID recognition algorithm is proposed to highly reduce the times of characteristic matching. Then a prototype system is built based on the above algorithm and the experiment results demonstrate that the IoT ID recognition algorithm has a high recognition ratio and low computational complexity.