United States Patent 9,961,592
Watfa , et al. May 1, 2018
Enhancements for operation of a timer
Abstract
A method and an apparatus for operating a timer in an integrated circuit (IC) are disclosed herein. The IC includes a timer, a receiver configured to receive a circuit switched (CS) service notification, a transmitter configured to transmit an evolved packet system mobility management extended service request (ESR) message, and a processor configured to start the timer in response to transmitting the ESR and stop the timer in response to reception of a handover command and completion of a CS fallback procedure by the receiver, wherein the handover command directs the IC to handover to another radio access technology (RAT) so that a CS call may be established. The processor may be configured to stop the timer in response to reception of a cell change command and completion of a CS fallback procedure by the receiver, wherein the cell change command directs the IC to perform a cell change procedure.
Inventors:
Watfa; Mahmoud (Saint Leonard, CA), Aghili; Behrouz (Commack, NY), Olvera-Hernandez; Ulises (Kirkland, CA)
Applicant:
Name
City
State
Country
Type
INTERDIGITAL PATENT HOLDINGS, INC.
Wilmington
DE
US
Assignee:
InterDigital Patent Holdings, Inc. (Wilmington, DE)
Family ID:
1000003267668
Appl. No.:
14/556,939
Filed:
December 1, 2014
Prior Publication Data
Document Identifier
Publication Date
US 20150085827 A1 Mar 26, 2015
Related U.S. Patent Documents
Application Number
Filing Date
Patent Number
Issue Date
12615762 Nov 10, 2009 8903376
61166071 Apr 2, 2009
61112880 Nov 10, 2008
Current U.S. Class: 1/1
Current CPC Class: H04W 36/0022 (20130101); H04W 76/18 (20180201)
Current International Class: H04W 4/00 (20090101); H04W 36/00 (20090101
PPP
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