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. 24, 2016
Filed:
Sep. 13, 2013
Microsoft Corporation, Redmond, WA (US);
Gursharan Sidhu, Seattle, WA (US);
Humayun Khan, Issaquah, WA (US);
Tony Bell, Carnation, WA (US);
Namendra Kumar, Redmond, WA (US);
Sankaran Narayanan, Redmond, WA (US);
Mahendra Sekaran, Sammamish, WA (US);
Vishal Soni, Redmond, WA (US);
John Bruner, Bellevue, WA (US);
Jeffrey Kay, Bellevue, WA (US);
Anish Desai, Bellevue, WA (US);
Rod Fleck, Bellevue, WA (US);
Abhilash Nair, Bellevue, WA (US);
Gaurav Pancholi, Redmond, WA (US);
Mansoor Jafry, Kirkland, WA (US);
Ken Wolfe, Mercer Island, WA (US);
MICROSOFT TECHNOLOGY LICENSING, LLC, Redmond, WA (US);
Abstract
Voice call continuity is provided for calls that are carried over a hybrid network infrastructure in which access connections are distributed over loosely coupled network portions including a backend network such as a core VoIP (Voice over Internet Protocol) service network, one or more cellular mobile networks, and a public switched telephone network ('PSTN'). The calls are routed through the core VoIP network regardless of their points of origination or termination in other network portions so that signaling and call context are anchored in the core VoIP network. The conditions under which user equipment operate are continuously monitored so that when a connection is determined to have been unacceptably degraded or is likely to be interrupted, and/or a more optimal connection is available, a handover of the call to another connection is initiated so that call continuity is maintained using the lowest cost connection that provides acceptable call quality.