In industrial Internet, both wired communication (e.g., industrial Ethernet, fieldbus) and wireless communication (e.g., Wi-Fi, 5G, dedicated industrial wireless technology) are widely used, but the specific choice depends on the needs of the scene. The following is an analysis of the technical characteristics, application scenarios and development trends:
I. Wired communication: stable and reliable, still the core of industry
Technical characteristics
High real-time and reliability: Industrial Ethernet (e.g. PROFINET, EtherCAT) realizes microsecond delay through hard real-time operating system and dedicated network card to meet the demand for precision control.
Strong anti-interference ability: metal wire or fiber optic transmission is not subject to electromagnetic interference, suitable for strong industrial environments (e.g. metal smelting, power equipment).
High security: Physical isolation reduces the risk of data leakage and meets industrial safety standards.
Typical application scenarios
Production control layer: real-time data interaction between PLC (programmable logic controller) and sensors and actuators.
Equipment layer interconnection: stable communication of core equipment such as industrial robots and CNC machine tools.
Deterministic networks: e.g. time-sensitive networks (TSN) in automotive manufacturing, semiconductor production.
Market Share
The market share of industrial Ethernet in the field of industrial data collection is gradually increasing due to its high transmission rate (Gigabit / 10 Gigabit), easy networking, and compatibility with Internet connectivity.
II. Wireless Communication: Flexible Deployment, Becoming an Important Supplement
Technical characteristics
Flexibility and scalability: no wiring is required, supporting rapid deployment and production line reconfiguration, adapting to the needs of flexible manufacturing.
Cost Advantage: Reduce wiring costs (especially for old plant reconstruction), reduce downtime for maintenance.
Fast technology iteration: 5G, Wi-Fi 6/7 and other new technologies provide higher bandwidth and lower latency.
Typical Application Scenarios
Mobile device communication: real-time data transmission for AGVs (Automated Guided Vehicles), drone inspections, and worker handheld terminals.
Remote monitoring and predictive maintenance: Wide-area equipment status monitoring through LoRa, NB-IoT and other technologies.
Hazardous environment operation: such as in mining and chemical scenarios, wireless technology replaces manual inspection and improves safety.
Key Technology Direction
5G industrial private network: support uRLLC (ultra-reliable low-latency communication) and mMTC (massive machine communication) to realize extreme scenarios such as remote surgery and autonomous driving.
Time-sensitive network (TSN) and wireless convergence: Balance wireless flexibility and wired certainty through TSN over 5G/Wi-Fi.
Dedicated industrial wireless protocols: such as WirelessHART, WIA-PA, optimized for the process industry, with strong anti-jamming capability.
III. the synergy of wired and wireless: hybrid networking into the mainstream
Overlay mode: overlay wireless on top of the existing wired network for non-real-time data collection (e.g., environmental monitoring, inventory management).
Convergence mode: wireless gradually replace part of the wired control network, such as through 5G + edge computing to achieve PLC wireless.
Typical case:
Automobile manufacturing: industrial Ethernet connects core equipment, Wi-Fi 6 supports AGV scheduling, 5G is used for remote quality inspection.
Smart agriculture: LoRa monitoring of soil moisture, 4G/5G transmission to the cloud, wired network to control the irrigation system.
IV. the future trend: wireless proportion continues to increase, but wired is still irreplaceable
Wireless technology penetration rate growth:
It is expected that by 2027, the size of the industrial wireless communication market will exceed that of wired, especially in the field of logistics, energy, and smart manufacturing.
The cost of 5G industrial modules is decreasing (from $1000 to $100), which promotes the scale of application.
Wired technology continues to innovate:
Single-pair Ethernet (SPE) simplifies cabling, supports PoE (Power over Ethernet), and reduces comprehensive costs.
Industrial optical bus technology breaks through the transmission distance limitation, suitable for large-scale factories.
Standards harmonization accelerates:
OPC UA over TSN, 5G LAN and other protocols converge to solve multi-protocol compatibility issues.
Major industrial countries around the world (e.g., Germany, the United States, China) have incorporated wireless technology into their industrial Internet strategies.