Industry standardization progressing Wi-SUN latest update
Wi-SUN Enhanced HAN (Home Area Network) has completed standardization for the joint metering function that collects metering data for gas, water, etc., via next-generation smart meters. Wi-SUN FAN (Field Area Network) 1.1 supports OFDM, which improves communication distance, speed, and quality in addition to the conventional FSK. Products have already been released.
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Wi-SUN Enhanced HAN (Home Area Network)
The current smart electricity meter, which is equipped with a wireless communication unit in a home electricity meter to collect meter reading data and control the meter, has been introduced since 2013, and tens of millions of units have already been introduced and are in operation. The standard currently adopted as the wireless communication standard for this smart electricity meter is the Wi-SUN HAN (Home Area Network) system, standardized by the international standardization organization Wi-SUN Alliance. Wi-SUN HAN is mainly used for "Route B", which is the communication route that connects this smart electricity meter to the energy management system installed in the house or building. On the other hand, for water and gas meters, each business mainly performs remote meter reading using its own communication equipment, or workers visually read each meter one by one. From the perspective of investment efficiency and work efficiency, there is a growing need to read meters collectively via smart electricity meters. In addition, the specified measurement system will start in April 2022, and even meters that have not been inspected under the Weights and Measures Act can be used for electricity trading, etc. if they meet certain standards. This meter is called a special meter and is used for EV charging systems, solar power generation systems, etc. Accordingly, a communication route called the "IoT route" was defined, which transmits meter reading data from special meters, gas meters, and water meters via the electricity smart meter system installed in each home, etc. In May 2022, the Ministry of Economy, Trade and Industry's Next Generation Smart Meter System Study Group concluded that it would be appropriate to adopt the Wi-SUN enhanced HAN system, which has been standardized by the Wi-SUN Alliance, as the communication method for this route. In response to this adoption, the Wi-SUN Alliance established the Wi-SUN enhanced HAN standard suitable for the "IoT route" in the Wi-SUN HAN Working Group, and in February 2024, issued all official specifications, including technical specifications and specifications required for interoperability testing. In 2019, the Wi-SUN Alliance started Wi-SUN JUTA profile certification in cooperation with the Telemetering Promotion Council, and is currently working on the standardization of joint meter reading via the IoT route, as well as U-bus air.
Wi-SUN FAN 1.1 (Field Area Network)
There is a growing need for large-scale (hundreds of units) and wide-area (several kilometers or more) IoT systems known as smart cities and smart metering, which are equipped with wireless communication functions in sensors, meters, monitors, etc. to solve various problems in urban environments. To realize this system, a robust wireless communication network that is high quality outdoors and has excellent resistance to obstructions caused by buildings, etc. is required.
Wi-SUN FAN is one of the standards of the international wireless communication standard for IoT, "Wi-SUN," which meets these requirements, and is already being introduced as a wireless communication network technology that can be interconnected between vendors in various infrastructures and applications using sensors, meters, monitors, etc. in smart cities, smart grids, and intelligent transport systems, in addition to metering for electricity, gas, and water. However, the transmission speed between wireless devices in the conventional standard was only a few hundred kbps, which was not sufficient for transmitting moving images, etc., and further speedup was required. In order to meet this demand, the Wi-SUN Alliance, which certifies the Wi-SUN system standard, has been promoting the development of the technical specifications and interoperability test specifications for Wi-SUN FAN 1.1.
Wi-SUN FAN1.1, which achieves transmission speeds 20 times faster than the current Wi-SUN FAN, has the following features:
- Physical layer and MAC layer compatible with IEEE 802.15.4/4g/4e
- IETF-established adaptation layer, network layer, and transport layer, such as 6LowPAN and IPv6
- Multi-hop communication method using RPL
- Frequency hopping
- Supports authentication security
- Multi-vendor interoperability
- Supports high-speed communication (supports OFDM modulation method, maximum transmission rate 2.4 Mbps)
- Backward compatibility with Wi-SUN FAN 1.0
- Mixing of different modulation methods and transmission speeds within the same network
-Multi-hop communication method using RPL
-Frequency hopping
-Supports authentication security
-Multi-vendor interoperability
-Supports high-speed communication (supports OFDM modulation method, maximum transmission rate of 2.4 Mbps)