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:
Nov. 17, 2009
Filed:
Dec. 14, 2004
Sajit Bhaskaran, Sunnyvale, CA (US);
Anmol Kumar, Santa Clara, CA (US);
Prashanth Krishnamurthy, Santa Clara, CA (US);
Sajit Bhaskaran, Sunnyvale, CA (US);
Anmol Kumar, Santa Clara, CA (US);
Prashanth Krishnamurthy, Santa Clara, CA (US);
Aspen Networks, Inc., Santa Clara, CA (US);
Abstract
A Multi-Homing System is equipped with an Adaptive ISP Access Cloud State Detection apparatus (ACSD) that improves the reliability of the availability of digital connections (links) between computer sites, such as a Computer Premises Network and the Internet, in which such connections are made by connecting through a multiplicity of ISP Access Clouds (links). Reliability is improved over prior art methods by using data elements of Internet Protocol datagrams, e.g. record fields or bits of fields, that are regularly and normally exchanged between the ISP Access Clouds and the CPN without creating additional data traffic. Data Elements from each ISP Access Cloud are used by processing functions of the by the ACSD to test for conditions that indicate that it may be in a DOWN status. when a DOWN status is suspected, other functions in the ACSD initiate transmission of a set of PROBE packets that can reliably determine if the suspect link is actually DOWN or merely giving a response that would be interpreted as DOWN by prior art methods.