# Industrial Internet Identity Resolution+5G Full Connection Digital Factory Research
## 4 Key Technologies and Applications
### Identity Resolution Full Connection Digital Factory  
The industrial Internet identity resolution technology is one of the key technologies to perform data sharing between the upstream and downstream of the industrial chain [36] and the information systems within the enterprise. The full connection digital factory focuses on the production, processing, transportation, product testing, and other links. The scanning of the product identification code, automatic acquisition of raw materials, parts, and products, finished product process parameters, and other information allows to achieve more efficient, flexible, intelligent, and accurate parameter configuration. It is also efficient for equipment control, process association, problem analysis, and other applications. In network collaboration, information correlation is established through the identity resolution in production processing, supply chain, and other links. Thus, the enterprises can share production capacity, inventory, logistics capacity, and other information in real time, so as to perform the design, (external) production, online sharing of manufacturing capacity, and accurate management of supply chain. The servitization extension focuses on the production, logistics, maintenance, and other links. By scanning the product identification code, the relevant information of raw materials, parts, and products can be automatically obtained from upstream and downstream enterprises. Using data governance, the identification application of product traceability, predictive maintenance, and spare parts management can be realized. In digital management, due to the complexity of the product circulation links, it focuses on exploring the product code allocation and identity resolution [37] to open up the data links of different upstream and downstream enterprises in product circulation, perform the data linking covering production and manufacturing, as well as the whole-life cycle management and supply chain, improve the decision-making efficiency, and allow more accurate and transparent management. The application of full connection digital factories with identity resolution is shown in Figure 4.  
The identity resolution is used to perform the whole data management process of the product. It performs data connection between raw materials and production, production and storage, and storage and logistics. It also reduces the storage costs, improves the turnover rate, performs the two-way interaction and dynamic update of AGV and facility information based on the active identification technology, instantly and safely matches the user needs, automatically matches the production process in intelligent production scenarios, improves efficiency, reduces the trial-and-error costs, and increases the yield. The active identification carrier is used to determine the process parameters and perform two-way monitoring. It facilitates the transparent manufacturing process of the production  
Figure 3: Edge computing architecture. line and promotes an efficient collaboration between the upstream and downstream of the supply chain. In addition, it provides a supply for the production and circulation process, reduces the production and operation costs, and improves the production efficiency and user experience. The identification coding technology includes the identification carrier, laser marking, and identification reading technologies. The enterprises choose one of the mainstream identity resolution systems according to their needs. Product coding is a premise of the product quality traceability. The two-dimensional code is favored by the enterprises due to its low cost, large data storage, high fault tolerance rate, and its ability to perform web page jump. The product identification code and web address are stored together in the two-dimensional code, which is attached to the minimum package or even the product by spraying or coding.