Kaushik Chakraborty

US Patent:

20100226269, Sep 9, 2010

Filed:

Mar 2, 2010

Appl. No.:

12/716104

Inventors:

Kaushik Chakraborty - San Diego CA, US
Soumya Das - San Diego CA, US
Ozgur Dural - San Diego CA, US
Krishnan Rajamani - San Diego CA, US
Samir S. Soliman - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04W 24/00
H04L 12/26

US Classification:

370252

Abstract:

Systems and methods for decreasing the amount of information sent on a feedback channel are disclosed. A hierarchical tree structure may be used to reduce the amount of information sent on the feedback channel. Spectral binning may also be used in conjunction with the hierarchical tree structure.

US Patent:

20100226452, Sep 9, 2010

Filed:

Mar 2, 2010

Appl. No.:

12/716032

Inventors:

Kaushik Chakraborty - San Diego CA, US
Soumya Das - San Diego CA, US
Ozgur Dural - San Diego CA, US
Krishnan Rajamani - San Diego CA, US
Samir S. Soliman - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04L 27/28

US Classification:

375260

Abstract:

Systems and methods for decreasing the amount of information sent on a feedback channel are disclosed. Various forms of spectral binning may be used to reduce the amount of information sent on the feedback channel. The systems and methods may be applicable to wideband communication systems, ultra-wideband communication systems, and/or other communication system using multiple carrier frequencies (e.g., tones).

US Patent:

20100227561, Sep 9, 2010

Filed:

Mar 2, 2010

Appl. No.:

12/716064

Inventors:

Kaushik Chakraborty - San Diego CA, US
Soumya Das - San Diego CA, US
Ozgur Dural - San Diego CA, US
Krishnan Rajamani - San Diego CA, US
Samir S. Soliman - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04B 17/00
H04B 15/00

US Classification:

455 631, 455 6711

Abstract:

Systems and methods for decreasing the amount of information sent on a feedback channel are disclosed. Spectral binning and/or a Markov state model may be used to reduce the amount of information sent on the feedback channel.

US Patent:

20120052855, Mar 1, 2012

Filed:

Mar 1, 2011

Appl. No.:

13/037598

Inventors:

Samir Salib Soliman - San Diego CA, US
Olufunmilola O. Awoniyi - San Diego CA, US
Kaushik Chakraborty - San Diego CA, US

Assignee:

QUALCOMM INCORPORATED - San Diego CA

International Classification:

H04W 56/00

US Classification:

4554221

Abstract:

Techniques are provided for frequency and timing synchronization of a femto access point (FAP). In one example, the FAP may be configured to establish an out-of-band (OOB) link with at least user equipment (UE), and receive aiding parameters from the at least one UE via the OOB link. The FAP may be configured to extract frequency and timing information from at least one uplink packet of the at least one UE based at least in part on the aiding parameters. Extracting the frequency and timing information may involve sniffing the at least one uplink packet to a macro base station (e.g., eNB).

US Patent:

20130059592, Mar 7, 2013

Filed:

Sep 1, 2011

Appl. No.:

13/224092

Inventors:

Kaushik Chakraborty - San Diego CA, US
Soumya Das - San Diego CA, US
Samir S. Soliman - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04W 36/00

US Classification:

455444

Abstract:

Methods, systems, and devices are described for femtocells to retrieve neighboring macrocells' timing information, using messages from mobile devices that are associated with the relevant macrocell In some cases, detection of the femtocell, such as through an out-of-band detection, may trigger the mobile device to determine timing information with respect to the macrocell and/or the femtocell. In some embodiments, the mobile device associated with the macrocell may be in active state and looking for a candidate femtocell for handover. The femtocell may receive this timing information from the mobile device and utilize it to synchronize with the neighboring macrocell. Embodiments may address fine timing synchronization and tracking for asynchronous and quasi-synchronous wide-area wireless networks (e.g., 3GPP/3GPP2 variants like UMTS, LTE, CDMA 1x, 1x EV-DO, etc).

US Patent:

20130099920, Apr 25, 2013

Filed:

Oct 24, 2011

Appl. No.:

13/279575

Inventors:

Bongyong Song - San Diego CA, US
Soumya Das - San Diego CA, US
Kaushik Chakraborty - San Diego CA, US
Samir S. Soliman - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

G08B 1/08

US Classification:

34053913

Abstract:

One feature includes a mobile device being used as a mobile beacon and proxy for a tracking device that may track an object, such as a pet. The mobile device may act as a beacon that transmits messages over a short range communications link to the tracking device. If the tracking device fails to receive the messages transmitted by the mobile device, it may be assumed that the pet has gone missing, and in response the tracking device may contact a tracking server with its location information via a wireless wide area network (WWAN). Additionally, the mobile device may act as a proxy of the tracking device by transmitting and receiving data to/from the tracking server using its own communication interface on behalf of the tracking device. This helps conserve the battery power of the tracking device because the tracking device does not use its own WWAN interface.

US Patent:

20130196680, Aug 1, 2013

Filed:

Jan 27, 2012

Appl. No.:

13/360463

Inventors:

Samir Salib Soliman - Poway CA, US
Kaushik Chakraborty - San Diego CA, US
Bongyong Song - San Diego CA, US
Soumya Das - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04W 64/00

US Classification:

4554561

Abstract:

Method and system for femtocell positioning are disclosed. An apparatus includes one or more processors, a femtocell positioning module configured to determine position of a femtocell, and a memory configured to store position of the femtocell. The femtocell positioning module, working with the one or more processors, includes logic configured to identify one or more wireless terminals and receive location information from the one or more wireless terminals via a first communication channel and determine position of the femtocell in accordance with the location information from the one or more wireless terminals. The femtocell positioning module further includes logic configured to obtain multiple set of range measurements between the femtocell and the one or more wireless terminals, logic configured to determine position of the femtocell in accordance with the location information and the multiple set of range measurements between the femtocell and the one or more wireless terminals.

US Patent:

20130244653, Sep 19, 2013

Filed:

Mar 16, 2012

Appl. No.:

13/423090

Inventors:

Bongyong SONG - San Diego CA, US
Kaushik CHAKRABORTY - San Diego CA, US
Samir Salib SOLIMAN - San Diego CA, US

Assignee:

QUALCOMM INCORPORATED - San Diego CA

International Classification:

H04W 56/00

US Classification:

455436, 4554221

Abstract:

A mobile device provides first information to an access point over an out-of-band wireless link. The access point uses the first information to coarsely synchronize with a macrocell base station. The access point transmits a low power pilot signal that is formed using a pseudo-random noise (PN) sequence. The mobile device uses the out-of-band wireless link to provide second information to the access point that indicates a PN phase of the pilot signal with respect to a reference time point. The access point uses the second information to finely synchronize with the macrocell base station. The mobile device communicates with a mobile operator core network through the access point using an in-band wireless link to the access point. The mobile device compensates for propagation delay when obtaining time information. The mobile device provides additional information to the access point, which the access point uses to adjust for continued clock drift.