Issue link: https://resources.mouser.com/i/1466700
ROHM SEMICONDUCTOR 2022 19 LEARN MORE LEARN MORE BM1390GLV-Z Pressure Sensor IC BD71631QWZ Linear Charger 2. Advanced authentication and encryption Authentication is performed using the EAP-TLS method and RADIUS/AAA servers. In addition, client certificates can be set for connected devices. And since only authorized devices are centrally managed by the border router, individual settings for each device are not needed even if the route changes. Also, secure communication is possible using AES encryption. Client certificates can be GlobalSign certificates issued by the Wi- SUN Alliance, which are designed to operate as formal client certificates when full-scale operation gets underway. 3. Frequency hopping In Japan, each device operates by performing channel switching in the range of twenty eight channels from 922.40MHz (Ch 33) to 928.00MHz (Ch 61) at 50kbps transmission and fourteen channels from 922.50MHz (CH33/34) to 927.7MHz (Ch 59/60) at 150kbps. For unicast communication, the EUI-64 MAC address of each device is used as the key, and for broadcast communication, the pseudo-random number TR51CF (TR51 Channel Function) or DH1CF (Direct Hash Channel Function) is used to calculate the channel used and communicate by switching channels at regular intervals. Channel switching can be changed depending on the purpose and operation of the system. And the switching channel range and mask can be set for each device, allowing users to configure flexible systems. Constructing a robust system strong against radio interference and noise by frequency hopping ensures secure, confidential communication. Under the current radio law, there is a transmission limit of six minutes per hour using the Wi-SUN FAN radio band, but there is a plan to extend the limit to twelve minutes per hour utilizing multiple channels based on frequency hopping, which is expected to expand the application scope once enforced.