| 摘要 |
The present invention relates to a communication system SYS between a first electronic device E1 and a second electronic device E2. The first electronic device E1 comprises a light emitter Le and the second electronic device E2 which comprises a photo-sensor Ps. The device E1 emits a first light pattern Lp1 continuously. Upon reception of the first light pattern Lp1, the device E2 emits first advertisement data (Ad1). Upon reception of said first advertisement data Ad1, the device El emits a light data frame Ld comprising identification data IDe1 and secret data Ds. Upon reception of said light data frame Ld, the device E2 emits a second advertisement data Ad2 comprising data Da based on the identification data IDe1. Upon reception of said second advertisement data Ad2, the device E1 ignores the possible others advertising devices and establishes a communication link L with said device E2 and keeps the identification data IDe1 together with the secret data Ds in order to secure the link |
