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. 24, 2001
Filed:
Mar. 19, 1998
Daniel Joseph Dove, Applegate, CA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A network node is connectable to a network. The node includes a physical media access sublayer. The physical media access sublayer includes a link monitor state machine. The link monitor state machine includes an evaluate link state, an evaluate carrier state, an increment criteria state and a link down state. In the evaluate link state, an idle timer is started. The evaluate carrier state is entered from the evaluate link state when a carrier event is detected before expiration of the idle timer. In the evaluate carrier state, a valid carrier timer is started. The increment criteria state is entered from the evaluate carrier state if a status error is detected or if the carrier event completes before expiration of the valid carrier timer. In the increment criteria state, a false carrier count is incremented. The link down state is entered from the increment criteria state if the false carrier count, after being incremented, is equal to a false carrier count limit.