It mainly analyzes one of the industrial Internet test beds released by the Industrial Internet Industry Alliance - a worry-free smart factory based on "5G+Industrial Internet" .
The test bed is jointly developed by Hongfujin Precision Electronics (Chengdu) Co., Ltd. + China Telecom Chengdu Branch . Combining the core capabilities of China Telecom's 5G cloud network and SA independent networking , build a 5G enterprise private network.
1. Test bed architecture
| level | describe |
| edge layer | Collect various industrial equipment and sensor data. |
| Network layer | Apply 5G, IoT and other network technologies to provide a variety of network connection methods to ensure interconnection between devices, network communication security, server virtualization, massive data storage and computing. |
| platform layer | Integrate the three technical systems of DT (data technology, data acquisition and edge processing), AT (analysis technology, empirical knowledge model and algorithm), OT (operation technology, industrial application micro-service components) to realize data management, analysis and service. |
| application layer | Design personalized industrial SaaS and APP for specific customers and scenarios. |
| AI models can be published as public cloud APIs, device SDKs, and deployed on private servers, and can be deployed to the edge or cloud to achieve edge-cloud collaboration in computing. | |
2. Core content
1. Sink MEC to the enterprise and build a 5G enterprise private network
The specific characteristics of the 5G MEC enterprise private network are as follows:
(1) The MEC is deployed down to the factory, and a 5G local area network in the park is established to solve the security problem that the factory data does not leave the park. A firewall is deployed between the enterprise's local server to achieve isolation and access control, ensuring safe and fast data transmission.
(2) The dedicated UPF, base station, and access STN equipment for the park are deployed in the lower part of the park, and wireless base stations are flexibly deployed according to the needs of the production area to provide a physically exclusive 5G private network. In addition, UPF controls the flow of 5G data, performs local distribution of data, realizes safe connection to various networks in the park, and realizes double protection of data security.
The 5G terminal initiates session establishment through the dedicated DNN in the park. The specific process is as follows:
Precondition: The terminal is configured with a dedicated DNN and subscribed to a dedicated DNN on UDM.
- The 5G terminal initiates a PDU session establishment request, and the PDU Session Establishment Request message carries a dedicated DNN;
- AMF sends a request to create an SM context to the SMF, and the PDU Session CreateSMContext Request message contains user location information, RAT type, DNN, etc.;
- SMF replies to AMF to create SM context response;
- The SMF continues to execute the user PDU session establishment process. According to the configuration, the SMF selects the edge UPF for the 5G terminal according to the specific DNN;
- SMF sends N4 session establishment request to UPF, and provides packet detection (PDR) etc. to be installed on UPF of this PDU session;
- UPF replies N4 session establishment response to SMF;
- SMF sends PDU session establishment response;
- The GTP tunnel address and TEID are mutually notified, and the PDU session is created successfully.
| Function and Configuration Requirements | |
| 5G terminal | Support configuration of DNN information, it is recommended to support multiple PDU sessions concurrently |
| 5GC | 1) SMF: Support selection of edge UPF according to the dedicated DNN signed by the terminal; 2) UDM: User-signed dedicated DNN. |
(3) Seamlessly connect with the existing park business to realize the ubiquitous interconnection of key elements such as production equipment, sensors, control systems, management systems, and industrial application systems, as well as full coverage of the production area network.
(4) 5G network slicing provides customized network features (large bandwidth, delay, capacity, etc.), computing features, and storage resource features to meet different business applications (equipment operation and maintenance management based on digital twins, remote devices based on 5G+AR) Maintenance, security warning based on 5G+8K+AI event recognition, intelligent logistics based on 5G+AGV,) have different network requirements.
Other additions:
1. CMC chip
The CMC chip integrates functions such as logic control, motion control, input and output, communication interface and storage. It can not only be applied independently to a single controller, but also can be expanded to form a large-scale control system and Internet of Things applications. It can be applied to industries such as smart home appliances, smart manufacturing equipment, automotive electronics, industrial Internet, and industrial robots.
| CMC chip type | Communication Interface | Special feature | Application direction |
| CMC motion control chip | SPIx2; I2Cx1; UARTx1; Ethernet x1; CANx1; 12 PWM outputs | Built-in algorithm library, motion control axis (4 axes) | sport control |
| CMC general control chip | SPIx2; I2Cx1; UARTx1; Ethernet x2; 12 PWM outputs; up to 80 configurable | Logic control, motion control axis (4 axes) | general control |
| CMC industrial communication chip | SPIx2; I2Cx1; UARTx2; Ethernetx1; CANx2 | Built-in algorithm library, support EPA interface and OPC server | Industrial Communication Gateway |
| CMC basic control chip | SPIx1; UARTx1; 2-way PWM output; 9-way ADC | LCD driver, built-in algorithm library | basic control |
| CMC motor control chip | SPIx1; I2Cx1; UARTx3; 18 ADCs; 6 DACs | LCD driver, built-in algorithm library | motor control |
| CMC Smart Home Appliance Chip | UARTx1; 9 ADCs; 2 PWM outputs | LCD driver, built-in algorithm library | basic control |