Wi-Wiは1ナノ秒の無線時刻同期技術
Jeff Geerling氏が、無線LAN上で1ナノ秒未満の精度で時刻同期を実現する「Wi-Wi」技術を紹介。従来のNTPやPTPと比較し、安価なESP32やRaspberry Pi Picoを使った検証結果を詳述。無線センサネットワークやIoT機器の高精度同期に新たな可能性を示す。
関連記事
Wi-Wi STAMP is a wireless time synchronization protocol developed by Japan's NICT, using the 900 MHz band for picosecond-level time sync and millimeter-level distance accuracy. Current prototypes achieve 20ps phase jitter and 30ns time sync, with next-gen targeting 5ns in real-world use. The system is housed in a smartphone-sized box.