# Industrial Internet Identity Resolution+5G Full Connection Digital Factory Research
## 4 Key Technologies and Applications  
### 5G Full Connection Digital Factory  
Many industries realized the potential of 5G as the new generation of communication technology. Thus, it is promoted in vertical markets such as agriculture, energy, healthcare, logistics, and electronic information. Smart manufacturing devices using 5G wireless control have been recently used in digital factories, which will allow the machines to use their computing power in combination with the cloud storage, cloud computing [28, 29], and other information technologies to control the manufacturing process in real time, without being restrained by physical wires. 5G integrates many features of 4G while solving its shortcomings. 5G has higher bandwidth and lower latency than Wi-Fi and 4G LTE, and it can support higher density of device links within the same area. One of the main  
Figure 1: Architecture of the full connection digital factory. differences between 5G and the previous generations of networks is that 5G adopts high concentration of machine-like communications (MTC) and IoT. In addition, it expands the mobile broadband capacities, where the data rates are growing. In addition, it provides advanced wireless connectivity for vertical industries such as the manufacturing industry. 5G supports the following basic communication types: enhanced mobile broadband (eMBB), massive type communication (MTC), and ultra-reliable low-latency communication (URLLC). eMBB provides extensive enhanced coverage and extremely high data rates, far exceeding 4G. MTC provides ubiquitous connectivity with low hardware and software device requirements while enabling battery saving through low-power operations. The URLLC application execution is highly critical and very demanding in terms of end-to-end low latency [30], reliability, and availability. A concrete example of these applications in manufacturing is the industrial automation and control requiring high performance connectivity. 5G will become an essential networking technology in the intelligent manufacturing environment driven by big data [31]. With its higher speed, low delay, large-capacity connected devices, and massive IoT connections [32], the system can reliably, safely, and continuously connect more devices to heterogeneous manufacturing resources for large-scale communication. This will improve the real-time operational control and decision-making capacity, flexibility, versatility, usability, and efficiency of the sustainable intelligent manufacturing system for future sustainable smart factories. With the increasing deployment of 5G communication base stations, all the data of digital factories will be collected and analyzed to provide detailed analysis for each service item of the factory operation management. The three key features of 5G technology are shown in Figure 2.  
In the field of digital factory, the application of 5G is divided into mobile network and fixed network. The 5G mobile network is used for communication between mobile devices in the workshop. The 5G fixed network is also known as the industrial 5G private network technology and industry optical ring (IOR). The integration of industrial 5G private network and IIoT [3] equipment edge computing [33] in workshops will transfer massive real-time production data of workshops without loss, in an ordered and fast manner, and assist the manufacturing operation platform to make analyses and decisions. The workshop level and production line level real-time intelligent control can then be realized. The industrial 5G private network adopts a ring structure to improve the network reliability. The industrial halo network consists of three parts: the head end equipment, terminal equipment, and passive halo network equipment. Using the SA network, the UPF of the user device is deployed in the enterprise park to implement MEC edge computing [34] and UPF sinking, providing enterprise users with exclusive network services such as  
Figure 2: Three key features of 5G technology.