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

Claim 0:
1. A terminal device that communicates with a base station by optical wireless communication and radio frequency (RF) wireless communication, the terminal device comprising:
an illuminance sensor that receives an optical signal for the optical wireless communication from the base station;
an information acquisition unit that retrieves signal information containing n bits (where n is an integer equal to or greater than 2) included in the optical signal;
an array generation unit that generates n pieces of signal information by sequentially shifting each bit of the signal information one bit at a time;
a list in which ID information and authentication information for initiating the RF wireless communication are associated; and
an analysis unit that performs a brute-force calculation of a correlation coefficient between the n pieces of signal information generated by the array generation unit and the ID information in the list, and selects the ID information with the maximum correlation coefficient.