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:
Jun. 28, 2016
Filed:
Apr. 30, 2014
Qualcomm Incorporated, San Diego, CA (US);
Lenaig Genevieve Chaponniere, San Diego, CA (US);
Stephen William Edge, Escondido, CA (US);
Cherng-Shung Hsu, San Diego, CA (US);
Ramachandran Subramanian, San Diego, CA (US);
Farrokh Khatibi, San Diego, CA (US);
Arungundram Chandrasekaran Mahendran, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus initiates a call attempt in an internet protocol multimedia subsystem (IMS) based on a dialed number, the dialed number including an emergency number. The apparatus receives a session initiation protocol (SIP) message in response to the call attempt. The apparatus determines in response to the SIP message whether to retry the call attempt as a normal call in a circuit-switched (CS) domain for an operator or as an emergency call in the CS domain for the operator. In an aspect, the determining is based at least in part on either an indication in the SIP message or on a characteristic of the operator.