Karthik Anantharaman

US Patent:

20120129487, May 24, 2012

Filed:

May 18, 2011

Appl. No.:

13/110836

Inventors:

Bharath Narasimha Rao - San Jose CA, US
Madhusudan Chaudhary - Sunnyvale CA, US
Karthik Anantharaman - Cupertino CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H04M 11/04

US Classification:

4554042

Abstract:

A current location of a mobile system in a wireless network can be determined by using information provided by a base station in communication with the mobile system. The information can include a system identifier (SID) table and a local time offset (LTM_OFF) value and a daylight savings time (DAYLT) value. The SID table is used to provide a mobile country code (MCC) associated with a country in which the mobile device is located. The LTM_OFF value is used to provide a range of longitude values in which the mobile device is located. The current location of the mobile device is based upon at least the range of longitude values and the current country. The current location is used to build an optimized scan list that is used, in turn, to identify and acquire access to the preferred system by a mobile device.

US Patent:

20120129520, May 24, 2012

Filed:

May 18, 2011

Appl. No.:

13/110840

Inventors:

Bharath Narasimha Rao - San Jose CA, US
Madhusudan Chaudhary - Sunnyvale CA, US
Karthik Anantharaman - Cupertino CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H04W 24/00
H04W 4/02

US Classification:

4554323, 4554561

Abstract:

A current location of a mobile system in a wireless network can be determined by using information provided by a base station in communication with the mobile system. The location information can be used to index a GEO Locate Table to determine a list of SIDs to populate an optimized scan list. The optimized scan list being used for system selection.

US Patent:

20120129548, May 24, 2012

Filed:

May 18, 2011

Appl. No.:

13/110835

Inventors:

Bharath Narasimha Rao - San Jose CA, US
Madhusudan Chaudhary - Sunnyvale CA, US
Karthik Anantharaman - Cupertino CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H04W 24/00

US Classification:

4554561

Abstract:

A current location of a mobile system in a wireless network can be determined by using information provided by a base station in communication with the mobile system. The information can include a system identifier (SID) table and a local time offset (LTM_OFF) value and a daylight savings time (DAYLT) value. The SID table is used to provide a mobile country code (MCC) associated with a country in which the mobile device is located. The LTM_OFF value is used to provide a range of longitude values in which the mobile device is located. The current location of the mobile device is based upon at least the range of longitude values and the current country.

US Patent:

20120309397, Dec 6, 2012

Filed:

Jun 3, 2011

Appl. No.:

13/153253

Inventors:

Bharath Narasimha RAO - San Jose CA, US
Karthik ANANTHARAMAN - Cupertino CA, US
Madhusudan CHAUDHARY - Sunnyvale CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H04W 36/14

US Classification:

455437

Abstract:

The quality of a wireless data connection is used to identify a suitable radio access network on which a wireless multi-mode device camps.

US Patent:

20130016632, Jan 17, 2013

Filed:

Jan 11, 2012

Appl. No.:

13/347925

Inventors:

Syed A. Mujtaba - Santa Clara CA, US
Madhusudan Chaudhary - Sunnyvale CA, US
Thanigaivelu Elangovan - Santa Clara CA, US
Karthik Anantharaman - Sunnyvale CA, US
Weiping Dou - San Jose CA, US
Isabel G. Mahe - Los Altos CA, US

International Classification:

H04W 52/02
H04B 1/56
H04B 1/44
H04L 5/14

US Classification:

370275, 370311, 370297, 455 82

Abstract:

A wireless electronic device having first and second baseband processors is provided. In one suitable arrangement, radio-frequency power splitters and adjustable low noise amplifiers may be form in the receive paths. The use of power splitters allow signals associated with the first and second baseband processors to be received in parallel. In another suitable arrangement, radio-frequency switches are used in place of the power splitters. The states of the switches may be controlled using at least one of the first and second baseband processors. The use of switches instead of power splitters requires that wake periods associated with the first baseband processor and wake periods associated with the second baseband processor are non-overlapping. To ensure minimal wake period collision, a wake period associated with the second baseband processor may be positioned at a midpoint between two successive wake periods associated with the first baseband processor.

US Patent:

20130064151, Mar 14, 2013

Filed:

Sep 13, 2011

Appl. No.:

13/231804

Inventors:

Syed A. Mujtaba - Santa Clara CA, US
Kee-Bong Song - Santa Clara CA, US
Xiaowen Wang - Cupertino CA, US
Young Jae Kim - San Jose CA, US
Vinay R. Majjigi - Sunnyvale CA, US
Johnson O. Sebeni - Fremont CA, US
Romain Trilling - Cupertino CA, US
Tahir Shamim - San Jose CA, US
Karthik Anantharaman - Cupertino CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H04W 52/02

US Classification:

370311

Abstract:

A mobile wireless device adapts receive diversity during discontinuous reception based on downlink signal quality, page indicators and page messages. When the downlink signal quality exceeds a pre-determined threshold, the mobile wireless device decodes a page indicator channel through an initial antenna, and otherwise, decodes a paging channel through the initial antenna without decoding the page indicator channel. The mobile wireless device switches to decoding the paging channel through an alternate antenna when a page indicator decodes as an erasure. When a paging message received through a single antenna decodes with an incorrect error checking code, the mobile wireless devices enables receive diversity through multiple antennas for subsequent decoding. The mobile wireless device switches between single antenna reception and multiple antenna reception based on tracking multiple consecutive error checking code failures and successes.

US Patent:

20130237198, Sep 12, 2013

Filed:

Mar 6, 2012

Appl. No.:

13/413587

Inventors:

Prashant Vashi - Cupertino CA, US
Karthik Anantharaman - Cupertino CA, US
Madhusudan Chaudhary - Cupertino CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H04W 4/00

US Classification:

455418

Abstract:

A wireless device described herein may be configured to wait for a period of time before originating a data call after receiving a data call termination request from another device. The period of time may be selected to ensure that a page request, such as for a voice call, is received by the wireless device before attempting to originate the data call.

US Patent:

20130244723, Sep 19, 2013

Filed:

Mar 14, 2013

Appl. No.:

13/829279

Inventors:

Prashant H. Vashi - Cupertino CA, US
Madhusudan Chaudhary - Cupertino CA, US
Brian H. Cassidy - Cupertino CA, US
Karthik Anantharaman - Sunnyvale CA, US
Bharath Narasimha Rao - Cupertino CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H04W 48/18

US Classification:

4555521

Abstract:

Methods and apparatus for dynamic search management in a multi-mode device. In one embodiment, a mobile device performs network search and acquisition by dynamically changing search delays and/or search frequencies. In one implementation, the mobile device adjusts the amount of time allocated for each network search based on e.g., previous network connection history (e.g., previously connected to a home network, previously connected to a roaming network), device conditions, user preferences, geographical information, etc. By focusing search effort on cellular technologies which have a high likelihood of success, the mobile device can greatly improve search time and reduce unnecessary power consumption.