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. 28, 2006
Filed:
Oct. 23, 2001
Applicant:
Takayuki Nyu, Tokyo, JP;
Inventor:
Takayuki Nyu, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 17/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A network device monitors a signal transmitted to a wireless or optical link and a signal received from the link for detecting a bit-by-bit coincidence between them. In response to the detection of the coincidence, the network device determines that the received signal is a copy of the transmitted signal. The network device further monitors its transition states for detecting a predetermined state which would persist indefinitely during a link failure. When the predetermined state and the copy of the transmitted signal are simultaneously detected, the network device discontinues its predetermined state and enters a normal state.