Patent ID: 11929781
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. A communication method between a terminal device and a base station by optical wireless communication and radio frequency (RF) wireless communication, the method comprising:
by the terminal device,
receiving an optical signal for the optical wireless communication from the base station;
retrieving signal information containing n bits (where n is an integer equal to or greater than 2) included in the optical signal;
generating n pieces of signal information by sequentially shifting each bit of the signal information one bit at a time;
using a list in which ID information and authentication information for initiating the RF wireless communication are associated to perform a brute-force calculation of a correlation coefficient between the n pieces of signal information and the ID information in the list; and
selecting the ID information with the maximum correlation coefficient.