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:
Apr. 17, 2012
Filed:
Apr. 25, 2008
Shiro Mazawa, Fujisawa, JP;
Toshiyuki Saito, Kyotanabe, JP;
Keisuke Takeuchi, Kunitachi, JP;
Rintaro Katayama, Kokubunji, JP;
Shiro Mazawa, Fujisawa, JP;
Toshiyuki Saito, Kyotanabe, JP;
Keisuke Takeuchi, Kunitachi, JP;
Rintaro Katayama, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A wireless access terminal, after handoff, adds channel quality information calculated in the wireless access terminal to a header of transmit data and transmits this data until a wireless base station succeeds in receiving at least one or more packets. The wireless base station, when having succeeded in receiving a packet for the first time after the handoff, extracts the channel quality information from a received header to initialize channel quality information inside the wireless base station. Subsequently, the wireless base station autonomously updates the channel quality information in response to success or failure of packet reception and controls the transmission rate.