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:
Mar. 05, 2013
Filed:
Dec. 22, 2009
Akira Yamaguchi, Fujimino, JP;
Kanshiro Kashiki, Fujimino, JP;
Takashi Fujimoto, Fujimino, JP;
Kazunori Takeuchi, Fujimino, JP;
Akira Yamaguchi, Fujimino, JP;
Kanshiro Kashiki, Fujimino, JP;
Takashi Fujimoto, Fujimino, JP;
Kazunori Takeuchi, Fujimino, JP;
KDDI R&D Laboratories Inc., Saitama-ken, JP;
Abstract
A cognitive terminal includes different types of radio modules suiting to different types radio media employed by a cognitive base station in the radio communication system. The radio module of the cognitive terminal counts the number of times it receives/transmits ACK/NACK in each unit time. A radio environment cognition unit of the cognitive terminal performs calculations using the count number(s) in consideration of the packet transmission time interval or the time required for repeating a single data packet, thus measuring characteristics of delay time variations in uplink/downlink communication with respect to each radio media. Thus, it is possible for the cognitive terminal to switch over radio media based on ACK/NACK in uplink/downlink communication.