Ce Xu

US Patent:

7277416, Oct 2, 2007

Filed:

Sep 2, 2003

Appl. No.:

10/652559

Inventors:

Patricia Ruey Chang - San Ramon CA, US
Clarence E. Drumheller - Belleville NJ, US
Ce Xu - San Ramon CA, US
William C. King - Lafayette CA, US
Jack Tang - Danville CA, US
Peter Hu - Pleasanton CA, US
Peter Li - Albany CA, US

Assignee:

Cellco Partnership - Bedminster NJ

International Classification:

H04Q 7/00
H04J 15/00
H04M 1/00
H04M 3/00

US Classification:

370338, 370328, 370912, 455419, 4555501, 4555562

Abstract:

In existing standards for packet data communication over enhanced cellular networks, for a subscriber having a static address, the network relies on the terminal to provide the static address. Consequently, the terminal needs to know (be programmed with) its own static address and typically the address of a home agent element of the network. To eliminate the attendant need to provision such address data in the mobile station, the static address is stored in a node of the network, and the network assigns that one address to the mobile station, every time when the subscriber requests packet data service, for example, using a mobile IP (MIP) type address assignment procedure. The address assignment operation may also provide the home agent address to the station.

US Patent:

7606189, Oct 20, 2009

Filed:

Jun 8, 2000

Appl. No.:

09/589974

Inventors:

David Jau Young Lee - San Ramon CA, US
Ce Xu - Concord CA, US
William Chien-Yeh Lee - Danville CA, US

Assignee:

Cellco Partnership - Bedminster NJ

International Classification:

H04W 4/00
H04W 36/00
H04L 12/56
H04J 3/22

US Classification:

370328, 370338, 370400, 370466, 4554321, 455436

Abstract:

Integration of the cellular network with an IP based network is disclosed. An integrated IP/cellular network can route packetized voice and data together in a more efficient manner. The present invention integrates IP based standards for a cellular IP solution with cellular centric vs. IP message gateway as the demarcation point. However, the present invention also provides support for cellular unique features for better performance. Multiple architectures are proposed to ease migration to a combined network as well as to show the various levels of support provided.

US Patent:

8103915, Jan 24, 2012

Filed:

Feb 12, 2010

Appl. No.:

12/704680

Inventors:

Ce Xu - San Ramon CA, US

Assignee:

Verizon Patent and Licensing Inc. - Basking Ridge NJ

International Classification:

G06F 11/00

US Classification:

714 43, 709229

Abstract:

A method performed by a domain name service client includes storing DNS entries in a local cache; sending a DNS query to another device to obtain an update to one of the DNS entries; determining whether a DNS response is received; and resetting a time-to-live (TTL) timer associated with the one of the DNS entries when the DNS response is not received.

US Patent:

20120072569, Mar 22, 2012

Filed:

Nov 29, 2011

Appl. No.:

13/305885

Inventors:

Ce Xu - San Ramon CA, US

Assignee:

VERIZON PATENT AND LICENSING, INC. - Basking Ridge NJ

International Classification:

G06F 15/173

US Classification:

709223

Abstract:

A method performed by a domain name service client includes storing DNS entries in a local cache; sending a DNS query to another device to obtain an update to one of the DNS entries; determining whether a DNS response is received; and resetting a time-to-live (TTL) timer associated with the one of the DNS entries when the DNS response is not received.

US Patent:

7272379, Sep 18, 2007

Filed:

Apr 26, 2002

Appl. No.:

10/133232

Inventors:

Jack T. Tang - Danville CA, US
Russel Brankley - Willingboro NJ, US
Daniel T. Belenets - Summit NJ, US
Ce Xu - San Ramon CA, US
William C. King - Lafayette CA, US
Peter Hu - Pleasanton CA, US
Patricia R. Chang - San Ramon CA, US
Peter Li - Albany CA, US

Assignee:

Cellco Partnership - Bedminster NJ

International Classification:

H04M 11/00

US Classification:

455406, 455405

Abstract:

Improved billing accuracy in session-based communications is provided by separating session (or connection) billing from session processing. If two sessions () on the same serving node are bridged, so the true stop time of the prior session () is not known, the stop time of the prior session is defined as a function of the last activity during (TALS) that session. To accomplish this, the serving node detects and stores the time of last activity and the time of initiation for each connection and determines the billing time accordingly, regardless of the state of the inactivity timer () or whether sessions were bridged by the serving node.

US Patent:

20170347252, Nov 30, 2017

Filed:

Aug 15, 2017

Appl. No.:

15/677718

Inventors:

- Arlington VA, US
Priscilla Lau - Fremont CA, US
Xuming Chen - San Ramon CA, US
Ce Xu - San Ramon CA, US

International Classification:

H04W 4/22
H04W 76/02
H04M 15/00

Abstract:

A method, a device, and a non-transitory storage medium provide an emergency call support service in which a network device of a visited network obtains user profile data of a wireless device from a home network of the wireless device, and provides the user profile data to a location server of the visited network. The emergency call support service allows an emergency call, when initiated by a roaming subscriber of the wireless device via the visited network, to include the user profile data and be provided to a public safety access point.

US Patent:

20170156043, Jun 1, 2017

Filed:

Nov 30, 2015

Appl. No.:

14/953949

Inventors:

- Arlington VA, US
Priscilla Lau - Fremont CA, US
Xuming Chen - San Ramon CA, US
Ce Xu - San Ramon CA, US

International Classification:

H04W 4/22
H04W 76/02
H04M 15/00

Abstract:

A method, a device, and a non-transitory storage medium having instructions are provided to receive an attach request from a wireless device to attach to the device; obtain a mobile telephone number of the wireless device from another device of a home wireless network of the wireless device, based on the attach request; receive subsequent to an attachment of the wireless device, a request to establish an unauthenticated Voice over Long Term Evolution (VoLTE) emergency call, wherein the wireless device is not registered with a visited Internet Protocol Multimedia Subsystem and the visited IMS is not communicatively coupled to a home IMS of the wireless device; and provide during an establishment of the unauthenticated VoLTE emergency call, the mobile telephone number to a public access safety point.

US Patent:

20160374044, Dec 22, 2016

Filed:

Jun 22, 2015

Appl. No.:

14/745705

Inventors:

- Arlington VA, US
Ce Xu - San Ramon CA, US
Priscilla Lau - Fremont CA, US
Xuming Chen - San Ramon CA, US

International Classification:

H04W 60/04
H04W 12/06
H04L 29/08

Abstract:

A system may receive a registration request that identifies a first user device identifier. The system may determine that the first user device identifier is not registered. The system may transmit an authentication challenge. The authentication challenge may request one or more credentials associated with a subscriber profile. The first user device identifier may be associated with the subscriber profile. The system may cause the first user device identifier to be registered based on a challenge response. The first user device identifier may be registered based on a result of authenticating the registration request. The system may receive subscriber information that is associated with the first user device identifier, based on causing the first user device identifier to be registered. The system may determine that the subscriber information identifies a second user device that may be associated with the subscriber profile. The system may provide a notification.