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:
Aug. 18, 2015
Filed:
Mar. 19, 2014
Applicant:
Panasonic Corporation, Osaka, JP;
Inventor:
Toshiyuki Sugitani, Saga, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04W 12/08 (2009.01); H04L 29/06 (2006.01); H04W 12/02 (2009.01); H04W 12/04 (2009.01);
U.S. Cl.
CPC ...
H04W 12/08 (2013.01); H04L 63/0428 (2013.01); H04W 12/02 (2013.01); H04W 12/04 (2013.01);
Abstract
An inexpensive radio communication apparatus is provided which can safely generate and share a key to be used for encryption/decryption and lower the possibility of loss of the key even if a packet error occurs at the time of reestablishment of a radio link. When a request for position registration that is made to a base unit is not a request made by encrypted communication using a common encryption key, the base unit transmits a message to request generation of an initial encryption key, and when a handset correctly responds to the message, both the base unit and the handset store information on the initial encryption key.