Xiao T Wang

US Patent:

6574203, Jun 3, 2003

Filed:

Jun 25, 2001

Appl. No.:

09/888913

Inventors:

Neil E. Bernstein - Short Hills NJ
Xiao C. Bernstein - New York NY
Wen-Yi Kuo - Parsippany NJ
Martin H. Meyers - Montclair NJ
Xiao Wang - Morristown NJ
Carl F. Weaver - Hanover NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04Q 700

US Classification:

370332, 370335, 370342, 455437, 455443

Abstract:

Inter-frequency handoffs in a CDMA or other wireless communication system are controlled using a noise-limited coverage trigger metric which is able to distinguish between same-frequency cell boundaries and other-frequency cell boundaries in the system. The trigger metric may be generated as a function of an average signal-to-noise measure for pilot signals received at a mobile station of the system and a linear sum of the signal-to-noise measures. The signal-to-noise measures may be generated in the mobile station and included in messages transmitted from the mobile station to one or more base stations of the system. The trigger metric is used to control a handoff from a current frequency to a new frequency in an ongoing call. The trigger metric may alternatively be based on a measure of mobile receive power alone. Other aspects of the invention reduce unnecessary searching for a new frequency and decrease the likelihood of âping-pongingâ from a current frequency to a new frequency by providing additional checks in the handoff process.

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:

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:

20080216767, Sep 11, 2008

Filed:

Jun 27, 2007

Appl. No.:

11/823179

Inventors:

Xiao Long Wang - Fort Lee NJ, US

International Classification:

A01K 27/00
A01K 29/00

US Classification:

119795, 16430

Abstract:

A pet leash including a handle, the handle having a grip portion, a capsule portion and an anchor portion. A cavity within the capsule portion is adapted to contain a payload such as a collapsible dog dish or a pet feces collection bag.

US Patent:

62528610, Jun 26, 2001

Filed:

Mar 26, 1998

Appl. No.:

9/048626

Inventors:

Neil E. Bernstein - Short Hills NJ
Xiao C. Bernstein - New York NY
Wen-Yi Kuo - Parsippany NJ
Martin H. Meyers - Montclair NJ
Xiao Wang - Morristown NJ
Carl F. Weaver - Hanover NJ

Assignee:

Lucent Technologies, Inc. - Murray Hill NJ

International Classification:

H04Q 700

US Classification:

370331

Abstract:

Inter-frequency handoffs in a CDMA or other wireless communication system are controlled using a noise-limited coverage trigger metric which is able to distinguish between same-frequency cell boundaries and other-frequency cell boundaries in the system. The trigger metric may be generated as a function of an average signal-to-noise measure for pilot signals received at a mobile station of the system and a linear sum of the signal-to-noise measures. The signal-to-noise measures may be generated in the mobile station and included in messages transmitted from the mobile station to one or more base stations of the system. The trigger metric is used to control a handoff from a current frequency to a new frequency in an ongoing call. The trigger metric may alternatively be based on a measure of mobile receive power alone. Other aspects of the invention reduce unnecessary searching for a new frequency and decrease the likelihood of "ping-ponging" from a current frequency to a new frequency by providing additional checks in the handoff process.

US Patent:

20220322263, Oct 6, 2022

Filed:

Apr 1, 2021

Appl. No.:

17/220893

Inventors:

- San Diego CA, US
Le Liu - Fremont CA, US
Alberto Rico Alvarino - San Diego CA, US
Xiao Feng Wang - San Diego CA, US
Mungal Singh Dhanda - Slough, GB
Jun Ma - San Diego CA, US
Peter Gaal - San Diego CA, US
Bharat Shrestha - San Diego CA, US
Liangping Ma - San Diego CA, US
Umesh Phuyal - San Diego CA, US

International Classification:

H04W 56/00
H04B 7/185
H04W 72/04

Abstract:

Methods, systems, and devices for wireless communications are described in which UEs may communicate with satellites or base stations, or both in a non-terrestrial network. Due to large distances between transmitting devices and receiving devices in a non-terrestrial network, the UE may account for propagation delay and frequency shift of communications with a satellite based on location information of the satellite. The UE may receive first satellite location information from a base station or a satellite, via a broadcast message. The UE may receive second satellite location information from the wireless network node via a unicast message, where both the first satellite location information and the second satellite location information relate to a same satellite. The UE may transmit an uplink communication via the satellite based on at least one of the first satellite location information or the second satellite location information.

US Patent:

20200266872, Aug 20, 2020

Filed:

Jan 20, 2020

Appl. No.:

16/747309

Inventors:

- San Diego CA, US
Jung Ho RYU - Fort Lee NJ, US
Kiran VENUGOPAL - Raritan NJ, US
Yan ZHOU - San Diego CA, US
Xiao Feng WANG - San Diego CA, US
Junyi LI - Chester NJ, US
Tao LUO - San Diego CA, US

International Classification:

H04B 7/06
H04L 5/00
H04W 72/04
H04W 24/10

Abstract:

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may detect a beam failure associated with a component carrier (CC) of a plurality of CCs that are aggregated. The UE may identify, based at least in part on detecting the beam failure, a CC group in which the CC and one or more other CCs, of the plurality of CCs, are included. The UE may transmit, to the BS, a beam failure recovery request (BFRQ) communication associated with the CC group. Numerous other aspects are provided.

US Patent:

20190392483, Dec 26, 2019

Filed:

Aug 29, 2019

Appl. No.:

16/555801

Inventors:

- Menlo Park CA, US
Xiao Ou Wang - San Francisco CA, US

International Classification:

G06Q 30/02
G06Q 50/00

Abstract:

Techniques for context sensitive overlays, comprising a social networking application. The social networking application may include, among other components, a social networking overlay management component to receive a request from a mobile device to determine a list of aggregate overlay information and user context information, and providing the list of aggregate overlay information and user context information to the mobile device, a context determination component to determine the user context information representative of at least one user context based at least partially on user profile information, location information, calendar event information, and/or external event information, and an overlay selection component to generate the list of aggregate overlay information based at least partially on the user profile information, overlay promotion information, and user context information