Xiao Q Wang

US Patent:

7974107, Jul 5, 2011

Filed:

Aug 27, 2008

Appl. No.:

12/199471

Inventors:

Yong Li - Campbell CA, US
Junjie Zheng - Santa Clara CA, US
Liang Yan - Campbell CA, US
John Kesterson - San Jose CA, US
Xiao Yan Wang - Pleasanton CA, US

Assignee:

iWatt Inc. - Los Gatos CA

International Classification:

H02M 3/335

US Classification:

363 2101, 363 2108, 363 2116, 363 2112

Abstract:

A hybrid constant current control system that uses both pulse width modulation (PWM) and pulse frequency modulation (PFM) control. When transitioning from constant voltage mode to constant current mode the present invention can continue to control using PWM. Thereafter, when the voltage has dropped, the present invention smoothly transitions to PFM mode. The point of transition is based upon the switching frequency and the lowest rated voltage of operation. The system and method avoids very short (narrow) Ton times which ensures accurate constant current (CC) control with bipolar junction transistor (BJT) devices. The present invention also avoids acoustic noise because the switching frequency is maintained at a high enough level to avoid such acoustic noise even when the energy transferred through the transformer is still substantial and the output voltage is not too low. In addition the output current limit is insensitive to variation in the inductance-input voltage ratio, and is minimized against leakage inductance.

US Patent:

20030088366, May 8, 2003

Filed:

Jul 11, 2002

Appl. No.:

10/193744

Inventors:

John Saunders - San Diego CA, US
Xiao Wang - San Diego CA, US
Karine Erb - San Diego CA, US
Brian Murphy - San Diego CA, US
R. Struthers - Encinitas CA, US

Assignee:

Neurocrine Biosciences, Inc. - San Diego CA

International Classification:

G01N033/48
A01N037/18
A01N043/04

US Classification:

702/019000, 514/002000, 514/044000

Abstract:

Computational method for the design of a calculated drug space and for the use of such drug space to identify focused screening libraries for drug discovery, as well as drugs identified by the same.

US Patent:

20050238068, Oct 27, 2005

Filed:

Apr 27, 2004

Appl. No.:

10/832560

Inventors:

Suning Tang - Fremont CA, US
Xiao Wang - San Jose CA, US

International Classification:

H01S003/10

US Classification:

372020000

Abstract:

A method and apparatus for generating frequency tunable radio-frequency (RF) pulses utilizing a tunable cavity solid-state laser are disclosed. In one preferred embodiment, an optical RF source provides optical pulses with 1 to 200 GHz repetition rate. The disclosed optical RF source consists of a pump laser and mode matching optics, a pump beam coupler, a laser cavity end mirror, a laser gain medium, a Saturable Bragg Reflector, and a mechanism to change the effective optical length of the laser cavity. By adjusting the effective optical cavity length between the cavity end mirror that also serves as laser output coupler and Saturable Bragg Reflector that also serves as the other end mirror of the cavity, the repetition rate of the output optical pulses is changed. In another preferred embodiment, an optical RF source consists of a pump laser and mode matching optics, a Saturable Bragg Reflector that also serves as a pump coupler, a laser cavity end mirror that also serves as laser output coupler, a laser gain medium, and a mechanism to change the effective optical length of the laser cavity. By adjusting the effective optical cavity length between the cavity end mirror and Saturable Bragg Reflector, the repetition rate of the output optical pulses is changed. In yet another preferred embodiment, an optical RF source further includes an optical to electrical signal converter, and at least one of the following: a RF connector, a connecting waveguide, and a coaxial transmission cable with at least one terminating, impedance matching resistor. In an additional preferred embodiment, an optical RF source consists of a pump laser and mode matching optics, a Saturable Bragg Reflector that also serves as an output coupler and laser cavity end mirror, a second laser cavity end mirror also serving as pump coupler, a laser gain medium, and a mechanism to change the effective optical cavity length of the laser. By adjusting the effective optical cavity length between the cavity end mirrors, the repetition rate of the output optical pulses is changed.

US Patent:

20140036870, Feb 6, 2014

Filed:

Mar 16, 2011

Appl. No.:

14/005030

Inventors:

Peter Skov - Beijing, CN
Xiao Yi Wang - Wheeling IL, US
Chun Hai Yao - Beijing, CN

Assignee:

Nokia Siemens Networks Oy - Espoo

International Classification:

H04J 3/16

US Classification:

370331, 370336

Abstract:

A method includes receiving information at a first access node with which a user equipment is associated, said information including timing information of a second access node. The method also includes providing access node information for said user equipment in dependence on said timing information, said access node information defining at least one time period when said user equipment is to at least one of transmit to and receive signals from said at least one of said first and second access node.

US Patent:

20140064251, Mar 6, 2014

Filed:

Apr 30, 2011

Appl. No.:

14/114625

Inventors:

- Espoo, FI
Xiao Yi Wang - Wheeling IL, US

Assignee:

NOKIA SIEMENS NETWORKS OY - Espoo

International Classification:

H04W 36/00

US Classification:

370331

Abstract:

A method includes receiving information at a user equipment from a first apparatus, the information indicating to the user equipment is to communicate with a second apparatus.

US Patent:

20140079009, Mar 20, 2014

Filed:

May 3, 2011

Appl. No.:

14/115380

Inventors:

- Espoo, FI
De Shan Miao - Beijing, CN
Peter Skov - Beijing, CN
Xiao Yi Wang - Wheeling IL, US

Assignee:

Nokia Siemens Networks Oy - Espoo

International Classification:

H04L 5/00

US Classification:

370329

Abstract:

The present invention proposes a method, including in a communication network area constituted by a plurality of transmission points configured for coordinated transmissions to at least one target, each transmission point being identified by an individual identifier, each transmission point being configured to transmit common reference signals on common channels and dedicated reference signals on dedicated channels to said at least one target device, assigning the respective individual identifier of each transmission point to the common reference signals on the common channels of the respective transmission point, and allocating, to the dedicated reference signals on the dedicated channels of respective plural transmission points, an identifier unrelated to the individual identifiers. Also, corresponding devices are addressed.

US Patent:

20220417931, Dec 29, 2022

Filed:

Sep 6, 2022

Appl. No.:

17/903695

Inventors:

- San Diego CA, US
Alberto RICO ALVARINO - San Diego CA, US
Le LIU - San Jose CA, US
Wanshi CHEN - San Diego CA, US
Xiao Feng WANG - San Diego CA, US
Hao XU - Beijing CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04W 72/04
H04L 5/00
H04W 74/08

Abstract:

A method, base station (BS), user equipment (UE), apparatus, and computer program product for wireless communication are provided. A BS and a UE may communicate using a narrowband Internet of Things (NB-IoT) communication system. However, a frequency, time, and/or power associated with transmission of a SIB1-NB on a non-anchor carrier may not be configured for NB-IoT. In some aspects, the BS may determine parameters, such as a time domain location parameter, a frequency domain location parameter, a quantity of repetitions, a power boosting parameter, and/or the like for a transmission in NB-IoT. In some aspects, a UE may determine to transmit a connection request message on a different carrier than a random access channel message.

US Patent:

20220417958, Dec 29, 2022

Filed:

Jun 25, 2021

Appl. No.:

17/359489

Inventors:

- San Diego CA, US
Xiao Feng Wang - San Diego CA, US
Umesh Phuyal - San Diego CA, US
Alberto Rico Alvarino - San Diego CA, US
Bharat Shrestha - San Diego CA, US
Peter Gaal - San Diego CA, US
Ayan Sengupta - San Diego CA, US

International Classification:

H04W 72/12
H04W 72/04
H04W 76/27
H04W 8/24

Abstract:

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a radio resource control (RRC) reconfiguration message from a base station including a configuration for communicating with the base station, and the base station may transmit an RRC reconfiguration complete message to the base station (e.g., in response to the RRC reconfiguration message). The UE may then apply the configuration in the RRC reconfiguration message for communicating with the base station after transmitting the RRC reconfiguration complete message. That is, the UE may delay application of the configuration in the RRC reconfiguration message until after the UE transmits the RRC reconfiguration complete message. Using these techniques, ambiguity between the base station and the UE on when the configuration is applied by the UE may be minimized, resulting in improved throughput and reduced latency in a wireless communications system.