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:
May. 04, 2010
Filed:
Jan. 31, 2006
Alexandru Gavrilescu, Redmond, WA (US);
Tin Qian, Bellevue, WA (US);
Alexandru Gavrilescu, Redmond, WA (US);
Tin Qian, Bellevue, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
The present invention provides a method by which the connectivity status of network connections on a PC is determined in real-time by passively reviewing packet information from the TCP/IP stack. To achieve high accuracy of the connectivity status determination, the method involves the determination of the edge of a local network. In cases where little or no network traffic is observed on the network, scalable active probing methods are designed to make accurate connectivity determination. Special considerations for network setups like networks with web proxy servers, NAT or edge firewalls are also included to improve the accuracy of the determination in those environments.