Overview
IEC 62980:2022 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies a parasitic communication protocol for radio-frequency wireless power transmission (RF WPT). This standard enables the transfer of power and communication to battery-free IoT (Internet of Things) devices by leveraging existing ISM (Industrial, Scientific, and Medical) band communication infrastructure using backscatter modulation. It defines the procedures and protocols that facilitate two-way, long-distance wireless communication between wireless power transmitters and sensor nodes.
The protocol targets ultra-low power devices, typically operating at power levels in the order of microwatts or less, enabling sensors and IoT devices to operate without batteries by harvesting energy from RF signals. This breakthrough supports applications in domestic IoT, micro-sensors, and environmental monitoring industries, promoting sustainable and maintenance-free IoT ecosystems.
Key Features
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Three key components are critical for the system:
- STA (Station): Transmits wireless power and data packets over ISM-band channels between HIE-APs.
- Battery-free SSN (Sensor Node): Uses backscatter modulation to change channel response signals, enabling communication without consuming power for transmission.
- HIE-AP (High-Integration Endpoint Access Point): Decodes signals modulated by the SSN and manages network communication.
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Utilizes backscatter modulation for uplink and downlink communication, significantly reducing power consumption for IoT nodes by reflecting and modulating existing RF signals instead of generating new transmissions.
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Defines protocols based on continuous wave (CW) type RF WPT and leverages channel state information (CSI) or received signal strength indication (RSSI) detection methods for robust communication.
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Specifies detailed physical layer characteristics including modulation, coding, and frame structure, ensuring standardized, interoperable wireless power and data exchange.
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Incorporates datalink layer protocols managing message exchanges, encoding methods such as FM0 and Miller encoding for reliable data transmission.
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Includes a comprehensive RF WPT control protocol to manage power transmission, network operations, and IoT device behavior during energy harvesting and communication.
Key Topics
- Parasitic Communication Protocol: Enables bidirectional long-range communication between power transmitters and battery-free sensor nodes using ISM band backscatter signaling.
- Wireless Power Transmission (WPT): Provides a method to deliver power wirelessly over radio frequencies for energy harvesting by IoT devices.
- Backscatter Modulation: A low-energy communication technique where devices modulate and reflect ambient RF signals, eliminating the need for active transmitters.
- Low-Power IoT Devices: Facilitates the deployment of sensors operating at micro-watt power levels without batteries.
- Communication Layers: Defines physical and data link layers supporting modulation, coding schemes, and structured message exchanges.
- Energy-Harvesting Network Architecture: Details the coordination of STAs and HIE-APs to establish continuous wireless power feeds and communication channels.
- Parasitic Downlink and Uplink Communication Procedures: Describe stepwise protocols for sending commands and receiving responses between APs and sensor nodes.
Applications
IEC 62980:2022 is highly relevant in industries and scenarios where battery-free, long-range wireless power and communication are critical:
- Domestic IoT Systems: Smart home sensors and devices that require autonomous operation without frequent battery replacement.
- Micro-Sensor Networks: Environmental and industrial micro-sensors embedded in hard-to-reach areas operating sustainably.
- Environmental Monitoring: Continuous data collection from sensors measuring air quality, temperature, humidity, and pollution without maintenance overhead.
- Industrial Automation: Deploying maintenance-free wireless sensor nodes for process monitoring and control.
- Healthcare Wearables: Powering body sensors without batteries for extended periods.
- Smart Agriculture: Long-range sensors tracking soil and crop conditions powered wirelessly.
The standard supports developing scalable and energy-efficient wireless sensor networks that significantly reduce operational costs and improve longevity.
Related Standards
IEC 62980:2022 complements and aligns with several related standards and technologies, including:
- ISM Band Standards: Regulatory frameworks governing ISM frequency usage for communication and power transmission.
- IEEE 802.15.4 and Bluetooth LE: Wireless communication protocols commonly utilized in IoT ecosystems.
- RFID and Backscatter Communication Standards: Provide foundational technology and principles related to backscatter modulation used in wireless power systems.
- Wireless Power Transfer (WPT) Standards: Such as Qi and AirFuel for inductive and resonant wireless charging, which focus on different frequency bands and mechanisms.
- IEC 62368 and IEC 60601: For safety and performance evaluations of wireless power and communication devices in consumer electronics and medical fields.
Integrating IEC 62980 with existing and emerging wireless communication and power standards accelerates the advancement of battery-free IoT deployments and sustainable energy solutions.
Keywords: IEC 62980, parasitic communication protocol, radio-frequency wireless power transmission, RF WPT, ISM band, backscatter modulation, battery-free IoT devices, wireless sensor network, low-power communication, energy harvesting, wireless charging protocol, environmental monitoring IoT, micro-sensors, wireless power control.