Jing Qu

US Patent:

8059665, Nov 15, 2011

Filed:

May 10, 2005

Appl. No.:

11/125141

Inventors:

Jing Qu - Reston VA, US
Manish Sharma - Fairfax VA, US

Assignee:

Nextel Communications Inc. - Reston VA

International Classification:

H04L 12/56

US Classification:

370401

Abstract:

Systems and methods for obtaining location information for a communication station in a first domain by a communication station in a second domain are provided. The communication station in the second domain embeds a location request message in a message formatted according to a first communication protocol, and transmits the message formatted according to the first communication protocol to a proxy server. The proxy server removes the embedded request message and forwards it to a location server, which is located in the first domain. The proxy server receives a location response message and embeds it in another message formatted according to the first communication protocol. The proxy server then transmits the another message formatted according to the first communication protocol to the communication station in the second domain, which can remove the embedded location response message.

US Patent:

8059809, Nov 15, 2011

Filed:

Mar 16, 2007

Appl. No.:

11/687366

Inventors:

Qiang Zhang - Fairfax VA, US
Jing Qu - Reston VA, US
Ramesh Kalathur - Fairfax VA, US

Assignee:

Nextel Communications Inc. - Reston VA

International Classification:

H04M 3/42

US Classification:

37921104, 37921101

Abstract:

Systems and methods of establishing group calls are provided. Contact index information is synchronized between a communication unit and a contact synchronization server. A group call request message, including index information for one or more contacts, is sent from a communication unit to a signaling server. The signaling server uses the index information to obtain communication unit addresses from the contact synchronization server.

US Patent:

8060121, Nov 15, 2011

Filed:

Nov 6, 2007

Appl. No.:

11/935983

Inventors:

Yaojun Sun - South Riding VA, US
Jing Qu - Reston VA, US
Joseph Schaedler - Reston VA, US
Wei-Ming Lan - Morrisville NC, US
Douglas R. Green - Lexna KS, US

Assignee:

Sprint Spectrum L.P. - Overland Park KS

International Classification:

H04W 68/00

US Classification:

455458, 4554141, 455450, 455451, 4554521, 4554522, 455453, 455515, 3703102, 370312, 370328

Abstract:

Methods and systems are described for providing a presence service that is particularly useful for mobile telecommunications devices. A plurality of outgoing presence updates are sent to a presence client. The system monitors the level of network traffic and determines whether the client is in a region of high network load. If the client is in a region experiencing a condition of high network load, the system throttles the outgoing presence updates during the condition of high network load. The level of throttling may depend at least in part on the amount of time that has elapsed since the presence client began a presence session, and/or the amount of time that has elapsed since an incoming presence update was received from the presence client. In determining the latter amount of elapsed time, the system may consider only the amount of time elapsed since an incoming non-automatic presence update was received from the presence client. When presence updates are throttled, the may schedule presence updates such that at least a minimum delay period elapses between consecutive updates to a particular client.

US Patent:

8200240, Jun 12, 2012

Filed:

Nov 23, 2009

Appl. No.:

12/623847

Inventors:

Jing Qu - Reston VA, US
Stephanie Teng-Ossman - SW Vienna VA, US

Assignee:

Sprint Spectrum L.P. - Overland Park KS

International Classification:

H04W 24/00

US Classification:

4554561, 4554042, 4554562, 4554566

Abstract:

Disclosed is a method and system for use of a trusted server such as an over-the-air provisioning server to facilitate mobile location determination. If a mobile location server (MLS) sends a location-determination message to a mobile station and does not receive a response back from the mobile station, there is a chance that the mobile station is not provisioned with a correct address of the MLS and that the mobile station therefore did not respond. To help jump start the location-determination process, the MLS may respond to that situation by instead causing a trusted server such as an over-the-air-service-provisioning (OTASP) server to send a location-determination message to the mobile station, triggering a response from the mobile station.

US Patent:

8290519, Oct 16, 2012

Filed:

Sep 22, 2011

Appl. No.:

13/240486

Inventors:

Yaojun Sun - South Riding VA, US
Jing Qu - Reston VA, US
Joseph Schaedler - Reston VA, US
Wei-Ming Lan - Morrisville NC, US
Douglas R. Green - Lexna KS, US

Assignee:

Spring Spectrum L.P. - Overland Park KS

International Classification:

H04W 68/00

US Classification:

455458, 4554141, 455450, 4554521, 4554522, 455453, 455515, 3703102, 370312, 370328

Abstract:

Methods and systems are described for providing a presence service that is useful for mobile telecommunications devices. A plurality of outgoing presence updates are sent to a presence client. The system monitors the level of network traffic and determines whether the client is in a region of high network load, and if so, the system throttles the outgoing presence updates during the condition of high network load. The level of throttling may depend at least in part on the amount of time that has elapsed since the presence client began a presence session, and/or the amount of time that has elapsed since an incoming presence update was received from the presence client. In determining the latter amount of elapsed time, the system may consider only the amount of time elapsed since an incoming non-automatic presence update was received from the presence client.

US Patent:

8472977, Jun 25, 2013

Filed:

May 8, 2012

Appl. No.:

13/466628

Inventors:

Jing Qu - Reston VA, US
Stephanie Teng-Ossman - SW Vienna VA, US

Assignee:

Sprint Spectrum L.P. - Overland Park KS

International Classification:

H04W 24/00

US Classification:

4554561, 4554042, 4554562, 4554565, 370338, 370401, 709224

Abstract:

Disclosed is a method and system for use of a trusted server such as an over-the-air provisioning server to facilitate mobile location determination. If a mobile location server (MLS) sends a location-determination message to a mobile station and does not receive a response back from the mobile station, there is a chance that the mobile station is not provisioned with a correct address of the MLS and that the mobile station therefore did not respond. To help jump start the location-determination process, the MLS may respond to that situation by instead causing a trusted server such as an over-the-air-service-provisioning (OTASP) server to send a location-determination message to the mobile station, triggering a response from the mobile station.

US Patent:

8045557, Oct 25, 2011

Filed:

Feb 29, 2008

Appl. No.:

12/040454

Inventors:

Yaojun Sun - South Riding VA, US
Jing Qu - Reston VA, US

Assignee:

Clear Wireless LLC - Kirkland WA

International Classification:

H04L 12/56

US Classification:

370390, 370229, 4554351, 4554522, 455519, 725 97, 725115, 725118

Abstract:

Methods, media, and systems are provided for optimizing the use of broadcast channels for group communication streams on a wireless telecommunications data network. Transmission proxy servers associated with base stations are used to determine whether a broadcast channel or unicast channel is most efficient for transmission of a group communication stream. Transmission proxy servers examine factors such as number of users, movement, duration and bandwidth required to make the channel determination. A contact management server coordinates the authentication across multiple access networks in coordination with the transmission proxy servers. Delivery can be more flexible, higher service levels can be more easily guaranteed, and secure but seamless handoffs are possible utilizing the claimed embodiments.

US Patent:

7761101, Jul 20, 2010

Filed:

Feb 20, 2007

Appl. No.:

11/708197

Inventors:

Jing Qu - Reston VA, US

Assignee:

Sprint Spectrum L.P. - Overland Park KS

International Classification:

H04W 24/00

US Classification:

4554562, 4554561, 4554563, 4554564, 4554565, 4554566, 455457, 4554042

Abstract:

Disclosed is a method and system for adjusting processing time for responding to a request for location of a mobile station. A mobile location server or other position-determining system sends a location query to the mobile station and determines if the mobile station possesses a fresh set of assistance data usable by the mobile station to acquire satellite-based positioning data. If the determination is that the mobile possesses fresh assistance data, then the system waits a first time period for the mobile station to respond to the query, otherwise the system waits a second time period greater than the first time period for the mobile station to respond. If the mobile station responds in time, the system returns in response to the request a specific indication of the mobile station's location; otherwise, the system returns a general location, such as a cell sector location for instance.