FeliCa

FeliCa is a contactless smart card technology developed by Sony that operates at 13.56 MHz in the high-frequency RFID band. The name comes from Felicity Card, reflecting Sony's vision of a technology that brings convenience to everyday life. While it shares the same frequency as other NFC standards, FeliCa uses a proprietary communication protocol that differs from ISO 14443 and ISO 15693, though it was later incorporated into the NFC ecosystem as one of three core technologies alongside ISO 14443 Type A and Type B. At the physical layer, FeliCa uses amplitude shift keying modulation with Manchester encoding for communication between the reader and card. The card draws power from the electromagnetic field generated by the reader, eliminating the need for batteries. Data transmission occurs at rates up to 212 or 424 kbit/s, making it faster than many competing contactless standards. The typical read range extends from a few centimeters to about 10 centimeters, though this varies based on antenna design and power output. This short range is intentional, providing better security for payment and access control applications. FeliCa implements sophisticated anticollision mechanisms that allow readers to communicate with multiple cards simultaneously in the same field. The system uses a time-slot-based method where the reader polls for cards and assigns time slots to prevent data collision. This makes FeliCa particularly effective in high-traffic environments like train stations where passengers tap cards rapidly in succession. The technology can process transactions in as little as 0.1 seconds, which is crucial for maintaining passenger flow at ticket gates. The most prominent applications of FeliCa are found in Japan, where it powers transportation systems like Suica and PASMO cards used across Tokyo's rail networks. These cards extend beyond transit to function as electronic money for convenience store purchases, vending machines, and parking. Hong Kong's Octopus card system also uses FeliCa technology. The standard has been ratified as JIS X 6319-4 by the Japanese Industrial Standards Committee and incorporated into ISO/IEC 18092 (NFCIP-1) as part of the broader NFC standard suite, ensuring interoperability with modern NFC-enabled smartphones.