David B Copeland

US Patent:

6782209, Aug 24, 2004

Filed:

Mar 2, 2001

Appl. No.:

09/798010

Inventors:

David J. Copeland - Kensington MD
Thomas D. Stephens - Columbia MD
Dean M. Smith - Morningside MD
Mark A. Laliberte - Columbia MD

Assignee:

Corvis Corporation - Columbia MD

International Classification:

H04J 1402

US Classification:

398157, 398162, 398196, 385 24

Abstract:

Optical transmission systems of the present invention include at least one optical amplifier generally including an optical signal amplifying medium supplied with pump power in the form of optical energy in via an optical pump source. The pump source includes multiple optical sources, at least two of which provide optical energy in first and second wavelength ranges separated by a frequency difference. The amplifier includes a wavelength controller configured to adjust the wavelength range of at least one of the optical sources to vary the frequency difference in a manner sufficient to vary optical intensity noise produced when the optical energy from the multiple optical sources is combined.

US Patent:

7010229, Mar 7, 2006

Filed:

Jul 16, 2004

Appl. No.:

10/893049

Inventors:

David J. Copeland - Silver Spring MD, US
Thomas D. Stephens - Brighton, AU
Dean M. Smith - Catonsville MD, US
Mark A. Laliberte - Columbia MD, US

Assignee:

Corvis Corporation - Columbia MD

International Classification:

H04J 14/02

US Classification:

398 92, 398141, 398 95, 35933712, 35933713

Abstract:

Optical transmission systems of the present invention include at least one optical amplifier generally including an optical signal amplifying medium supplied with pump power in the form of optical energy in via an optical pump source. The pump source includes multiple optical sources, at least two of which provide optical energy in first and second wavelength ranges separated by a frequency difference. The amplifier includes a wavelength controller configured to adjust the wavelength range of at least one of the optical sources to vary the frequency difference in a manner sufficient to vary optical intensity noise produced when the optical energy from the multiple optical sources is combined.

US Patent:

7826752, Nov 2, 2010

Filed:

Jun 2, 2006

Appl. No.:

11/446392

Inventors:

Raymond Zanoni - Columbia MD, US
David J. Copeland - Silver Spring MD, US
Alistair J. Price - Ellicott City MD, US

Assignee:

Level 3 Communications, LLC - Broomfield CO

International Classification:

H04B 10/00

US Classification:

398205, 398212, 398214, 398202, 398186, 398207

Abstract:

Apparatuses, systems, and methods are disclosed that provide for an agile coherent optical modem that can generate agile RF waveforms and data rates on a generic opto-electronic hardware platform. An “agile coherent optical modem” [ACOM] approach to optical communications by employing a software configurable and adaptive technologies to the transport system. The ACOM generate agile RF waveforms and data rates on a generic opto-electronic hardware platform. By employing advanced communication techniques to the optical domain such as wavelength agility, waveform agility, and symbol rate agility, it is possible to enable robust optical communications. The ACOM allows for the transport capacity of a communications link to be varied, thereby accommodating variations in transport conditions, range, opacity, etc.

US Patent:

20100080553, Apr 1, 2010

Filed:

Sep 29, 2008

Appl. No.:

12/239857

Inventors:

David Kerr - Ellicott City MD, US
Mark Laliberte - Columbia MD, US
Avery Van Gieson - Laurel MD, US
John Lai - Fulton MD, US
Kim Jepsen - Ellicott City MD, US
Wei Lu - Drive Bear, DE
Yan Han - Laurel MD, US
Marc Placidet - Columbia MD, US
Ulrik Gliese - Columbia MD, US
David Copeland - Silver Spring MD, US
Guangning Yang - Clarksville MD, US

International Classification:

H04B 10/00

US Classification:

398 5

Abstract:

A communication system may include a first control circuit to detect a break on a first optical link; a first optical source to supply a first optical signal on a second optical link in response to detecting the break on the first optical link, the first optical signal propagating in a first direction on the second optical link; a second control circuit to detect a presence of the first optical signal on the second optical link, and output a control signal in response to detecting the presence of the first optical signal; and a second optical source to supply a second optical signal on the second optical link, the second optical signal propagating in a second direction opposite the first direction, where the Raman pump is disabled in response to the control signal.

US Patent:

20110106471, May 5, 2011

Filed:

Nov 5, 2010

Appl. No.:

12/940447

Inventors:

Richard T. Curtis - Arlington VA, US
David Copeland - Washington DC, US

Assignee:

OPOWER, INC. - Arlington VA

International Classification:

G01R 21/00
G06F 17/18
G06F 19/00

US Classification:

702 62

Abstract:

Illustrative embodiments of the present invention are directed to a method and system for disaggregating climate control energy use from non-climate control energy use for a building. The method includes receiving a series of building energy use values and corresponding outdoor temperature values for a time period. Each of the energy use values and outdoor temperature values is associated with a time interval. The method further includes determining a series of temperature difference values for the time period based on a difference in temperature between a predetermined baseline temperature and each of the outdoor temperature values. A regression analysis is used to determine a climate control coefficient and a non-climate control coefficient from the energy use values and temperature difference values. The climate control coefficient and/or the non-climate control coefficient is used to determine climate control energy use and/or non-climate control energy use for the building.

US Patent:

20110129230, Jun 2, 2011

Filed:

Nov 1, 2010

Appl. No.:

12/917395

Inventors:

Raymond Zanoni - Columbia MD, US
David J. Copeland - Silver Spring MD, US
Alistair J. Price - Ellicott City MD, US

International Classification:

H04B 10/00

US Classification:

398140

Abstract:

Apparatuses, systems, and methods are disclosed that provide for an agile coherent optical modem that can generate agile RF waveforms and data rates on a generic opto-electronic hardware platform. An “agile coherent optical modem” [ACOM] approach to optical communications by employing a software configurable and adaptive technologies to the transport system. The ACOM generate agile RF waveforms and data rates on a generic opto-electronic hardware platform. By employing advanced communication techniques to the optical domain such as wavelength agility, waveform agility, and symbol rate agility, it is possible to enable robust optical communications. The ACOM allows for the transport capacity of a communications link to be varied, thereby accommodating variations in transport conditions, range, opacity, etc.

US Patent:

20130216232, Aug 22, 2013

Filed:

Nov 12, 2012

Appl. No.:

13/674873

Inventors:

David J. Copeland - Silver Spring MD, US
Alistair J. Price - Ellicott City MD, US

Assignee:

Level 3 Communications, LLC - Broomfield CO

International Classification:

H04B 10/11

US Classification:

398 79, 398115

Abstract:

Apparatuses, systems, and methods are disclosed that provide for an agile coherent optical modem that can generate agile RF waveforms and data rates on a generic opto-electronic hardware platform. An “agile coherent optical modem” [ACOM] approach to optical communications by employing a software configurable and adaptive technologies to the transport system. The ACOM generate agile RF waveforms and data rates on a generic opto-electronic hardware platform. By employing advanced communication techniques to the optical domain such as wavelength agility, waveform agility, and symbol rate agility, it is possible to enable robust optical communications. The ACOM allows for the transport capacity of a communications link to be varied, thereby accommodating variations in transport conditions, range, opacity, etc.

US Patent:

20200204978, Jun 25, 2020

Filed:

Aug 30, 2019

Appl. No.:

16/556818

Inventors:

- Baltimore MD, US
David J. Copeland - Silver Spring MD, US
Brian K. Haberman - Sykesville MD, US
Philip F. Chimento - Rockville MD, US

International Classification:

H04W 8/14
H04W 80/02
H04W 36/00
H04W 36/32
H04W 76/27
H04W 88/16

Abstract:

A wireless communication system may include an SGW operably coupled to a PGW to setup a session responsive to a request from a terminal to establish the session between the terminal and the PGW. The system further includes an MME configured to authenticate the terminal and provide bearer management in response to the request. The MME is configured to provide bearer information to the SGW. The system also includes base stations operably coupled to the SGW via a data plane connection and operably coupled to the MME via a control plane connection. The base stations are configured to handover connection to the terminal between the base stations in response to movement of the terminal between coverage areas of the base stations. The MME is configured to assign a deferred bearer in response to a determination that suitability criteria for establishing an active bearer are not met, the deferred bearer reserving a future data bearer and signaling the terminal to store data locally until the future data bearer is established.