The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2017
Filed:
Mar. 28, 2014
Hitachi Kokusai Electric Inc., Tokyo, JP;
Hitachi Kokusai Electric, Inc., Tokyo, JP;
Abstract
There is provided a wireless communication system that is capable of preventing interference with a primary use system caused by a CPE emitting radio waves at a frequency which is not a transmittable frequency before acquiring a list of transmittable frequencies based on its position information. In a wireless communication system that uses white space, a BSand a CPEstore a specific frequency which is guaranteed to not interfere with a primary user. The BSregularly switches between a first period when communication is performed at an operating frequency that uses white space and a second period when communication is performed at the specific frequency. In a case where whether the operating frequency is a transmittable frequency of the CPEis not known, the CPEperforms communication with the base station at the specific frequency in the second period, and in a case where the operating frequency is recognized as the transmittable frequency, the CPEperforms communication at the operating frequency in the first period, and performs communication at the specific frequency in the second period.