What is Wi-SUN?

Wi-SUN, which stands for Wireless Smart Utility Network, utilizes the 920MHz band referred to as specified low-power wireless radio in Japan. Although featuring slower communication speeds than Wi-Fi which uses the 2.4GHz and 5GHz bands, advantages include a longer communication range, stable connection even against obstacles, and lower power consumption.

Wi-SUN Adoption

Wi-SUN has been adopted as the standard for B-Route communication between smart meters (next-generation power meters from Japan’s leading power companies) and residential HEMS (Home Energy Management Systems).

Wi-SUN B Route Application

The adoption of Wi-SUN for B-Route communication is expected to expand to AC and lighting connected to HEMS gateways as well as HAN (Home Area Networks) in the future.

Wi-SUN Profile

Wi-SUN utilizes a PHY layer based on IEEE802.15.4g, with the upper layers varying depending on the application.
The Wi-SUN Alliance is responsible for certification and promotional activities to create and ensure interoperability of the Wi-SUN profile.

Wi-SUN Profile


HEMS standard profile that supports Wi-SUN ECHONET Profile for Route B, Wi-SUN ECHONET Profile for HAN, Enhanced HAN with sleeping and HAN relay functions, and more.


A wireless communication profile that enables mutual communication by supporting the U-Bus Air wireless standard for telemetering established by the NPO Telemetering Promotions Council (JUTA). Ultra-low power wireless communication is achieved, ensuring long-term operation of battery-equipped smart meters (i.e. gas, water) for over 10 years.


Field Area Network profiles developed for applications used to construct smart cities and smart grids, including infrastructure and advanced transportation systems.


Profiles utilized in factories, building automation, and maintenance systems to monitor the conditions of buildings and structures.

Wi-SUN Wireless
Download datasheet