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:
Oct. 14, 2014
Filed:
May. 15, 2009
Applicant:
Takahiro Kakumaru, Tokyo, JP;
Inventor:
Takahiro Kakumaru, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 12/26 (2006.01); H04L 29/12 (2006.01); H04W 8/26 (2009.01);
U.S. Cl.
CPC ...
H04W 8/26 (2013.01); H04L 29/1232 (2013.01); H04L 61/2092 (2013.01); H04L 29/12839 (2013.01); H04L 61/6022 (2013.01);
Abstract
A communication device selects a layer 2 address to be changed, and transmits a presence check request message via a network to which the communication device is connected. The communication device determines, based on a received result of the presence check request message, whether the layer 2 address is duplicated with another communication device connected to the network. When the communication device confirms the layer 2 address is not duplicated, the communication device changes the layer 2 address of the communication device.