## 5 The Implementation Path of the ICSPB-IoT  
### Implementation Path  
Based on the above operating mechanism, it can be seen that the key of an ICSPB-IoT is to develop an industry chain that integrates with the IoT information chain. From the perspective of the IoT information chain, the ICSPB-IoT can be divided into six systems according to the level of information intelligence [48], including facility system, network integration system, information integration system, data integration system, visual integration system, and application integration system. As shown in Figure 6, enterprises can build the systems according to the following ten steps:  
Figure 5: The operation mechanism of ICSPB-IoT in the product delivery stage. Step 1: Build SCOs. Binding construction resource elements to different RFIDs, sensors and other equipment to transform them to SCOs. Step 2: Establish a data acquisition system, which is used for real-time and automatic collection of data in different work scenarios. PIIC is a part of it. Step 3: Collect data from SCOs through the data acquisition system. Step 4: Establish a network integration system to achieve the interconnectivity among unit layers, production line layers, working space layers and enterprise layers. In the unit layer, the signals between SCOs are transmitted through a PLC (Programmable Logic Controller) and the data in the construction process are collected by adopting RFID receivers. The production line layer means that the control system of interconnected SCOs collects data through RFID receivers and then transmits the data to the production line control system by wired optical fiber (Internet) or wireless Internet of Things (such as NB-IoT, Narrow Band Internet of Things). The working space layer mainly refers to the assembly site and fabrication workshop for prefabricated components. Through wired and wireless networks, the working space system is connected to the enterprise system to realize the information interconnection between enterprises. The enterprise layer denotes the connection between the operating systems of the government, contractors and owners and is realized through the Internet. Step 5: Connect SCOs through the network integration system. Step 6: Establish an information integration system. Achieving information interoperability between the unit layer, production line layer, working space layer, and enterprise layer ultimately enables contractors to operate, process, and analyze information from subsystem to subsystem. The information system at the unit layer mainly includes the SCOs control system, the SCOs management system and the data acquisition system which can be integrated with the construction process, materials, transportation and storage information systems at the production line layer through intelligent gateways and PLCs. This realizes the production material supply management, component production quality  
Figure 6: The implementation path of ICSPB-IoT. management, and construction schedule management. The information system at the working space layer includes the manufacturing execution system, logistics execution system and on-site assembly execution system. The enterprise layer information system mainly includes the GMTs and DISEP. Step 7: Transmit the collected data to the information integration system through the network integration system. Step 8: Establish a data integration and analysis system. The collected data are stored in the IBD and transferred to contractors' subsystems for analysis. Step 9: Establish a visual integration system. Enterprises could build transparent and visual management display platforms for the entire system from the perspective of the unit layer, production line layer and working space layer. Step 10: Establish a multilayered application integration system. The unit layer is utilized to analyze and control the operating state for SCOs. The production line layer is used for the optimization, testing and analysis of the production line.