Patents by Inventor Terence A. Douglas

Terence A. Douglas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7944869
    Abstract: A mesh node of an infrastructure wireless local area network ‘WLAN’ is coupled to a battery which is coupled to a device that is able to harness energy from a source of renewable energy. Energy management of the mesh node includes conducting simulations of a system comprising the mesh node, the device, and the battery in its current state of charge, determining an admissible load for the mesh node from the simulations, and withholding communication services by the mesh node for one or more periods of time a cumulative duration of which is related to power consumption of the mesh node when handling the admissible load. The simulations involve meteorological data related to the source of renewable energy in the vicinity of the mesh node.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: May 17, 2011
    Assignee: McMaster University
    Inventors: Terence Douglas Todd, Amin Farbod, Amir Antoun Renne Sayegh
  • Publication number: 20110085533
    Abstract: A wireless access point supports data rates and advertises an indication of a minimum data rate for advertisement. Those of the supported data rates that are less than the minimum data rate for advertisement are reserved for limited use. A mobile station that requests to communicate with the wireless access point at one of the one or more supported data rates that are reserved for limited use is informed by the wireless access point how much time communications with the wireless access point at one or more of the one or more supported data rates reserved for limited use will be permitted.
    Type: Application
    Filed: December 15, 2010
    Publication date: April 14, 2011
    Applicants: RESEARCH IN MOTION LIMITED, MCMASTER UNIVERSITY
    Inventors: Terence Douglas Todd, Vytautas Kezys, Mohammed N.A. Smadi
  • Publication number: 20110034205
    Abstract: A mobile communication device is able to communicate with wireless local area network and with a cellular network. A communication system is able to route a communication session between the mobile communication device and another communication device either by way of the wireless local area network or the cellular network. The communication system is able to trigger the mobile communication device via the cellular network to search for and attempt to connect to the wireless local area network. The mobile communication device, in response to reception of signaling via the cellular network, is able to activate a wireless local area network interface of the mobile communication device and to establish a connection to the wireless local area network.
    Type: Application
    Filed: October 22, 2010
    Publication date: February 10, 2011
    Applicants: Research in Motion Limited, McMaster University
    Inventors: Terence Douglas Todd, Vytas Kezys
  • Patent number: 7873017
    Abstract: A wireless access point advertises data rates that it supports. A mobile station is permitted to communicate with the access point at one or more of the lower data rates only if the mobile station satisfies one or more conditions.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: January 18, 2011
    Assignees: Research In Motion Limited, McMaster University
    Inventors: Terence Douglas Todd, Vytas Kezys, Mohammed N. A. Smadi
  • Patent number: 7830844
    Abstract: A mobile communication device is able to communicate with wireless local area network and with a cellular network. A communication system is able to route a communication session between the mobile communication device and another communication device either by way of the wireless local area network or the cellular network. The communication system is able to trigger the mobile communication device via the cellular network to search for and attempt to connect to the wireless local area network. The mobile communication device, in response to reception of signaling via the cellular network, is able to activate a wireless local area network interface of the mobile communication device and to establish a connection to the wireless local area network.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: November 9, 2010
    Assignees: Research In Motion Limited, McMaster University
    Inventors: Terence Douglas Todd, Vytas Kezys
  • Publication number: 20100260051
    Abstract: A method is presented for adapting the packet size for VoIP communications, determined on-the-fly by the total network delay inherent at the time of packet transmission. If network delays are small relative to the maximum permissible latency for VoIP communications, the payload size per packet may be increased to maximize efficiency for the transmitted call. Alternatively, if network delays are large, the payload size per packet may be decreased in order to assure that the perceived quality of the transmitted call is acceptable.
    Type: Application
    Filed: June 14, 2010
    Publication date: October 14, 2010
    Applicant: MCMASTER UNIVERSITY
    Inventors: Terence Douglas Todd, Ahmad Mohammad Mohammad Kholaif
  • Publication number: 20100246460
    Abstract: Methods and apparatus for controlling a wireless access point (AP) (e.g. a battery-powered wireless AP) for reduced power consumption are provided. In one illustrative example, the AP is adapted to provide communication access for end stations in one or more activated service intervals of each superframe. During operation, the AP changes the number of activated service intervals that are available to end stations for the communication access, as well as the durations of their active subinterval durations, in accordance with a change in traffic requirements. The AP regularly broadcasts data which indicates the activated service intervals that are made available to the mobile devices. A wireless transceiver of the AP is enabled during each activated service interval made available to the mobile devices, but the AP is placed in a power conservation mode during each deactivated service interval provided in between the activated service intervals.
    Type: Application
    Filed: March 27, 2009
    Publication date: September 30, 2010
    Applicant: MCMASTER UNIVERSITY
    Inventors: Ahmad Mohammad Kholaif, Mohammed N. Smadi, Polychronis Koutsakis, Terence Douglas Todd
  • Patent number: 7796516
    Abstract: A method is presented for adapting the packet size for VoIP communications, determined on-the-fly by the total network delay inherent at the time of packet transmission. If network delays are small relative to the maximum permissible latency for VoIP communications, the payload size per packet may be increased to maximize efficiency for the transmitted call. Alternatively, if network delays are large, the payload size per packet may be decreased in order to assure that the perceived quality of the transmitted call is acceptable.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: September 14, 2010
    Assignee: McMaster University
    Inventors: Terence Douglas Todd, Ahmad Mohammad Mohammad Kholaif
  • Patent number: 7702303
    Abstract: A wireless local area network includes multiple access points with overlapping coverage, and modes of different power consumption are available to the access points. It is assessed whether the traffic load of the network may be adequately supported using fewer access points in an active mode. If so, the traffic load is redistributed from certain active access points among the remaining access points in the active mode. The certain access points are switched into a mode of lower power consumption than the active mode. Similarly, it is assessed whether the traffic load of the network is adequately supported by the current number of access points in an active mode. If not, certain access points which are in a mode of lower power consumption are switched to the active mode. The traffic load is redistributed among the access points in the active mode including the certain access points.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: April 20, 2010
    Assignee: McMaster University
    Inventors: Terence Douglas Todd, Amir Antoun Renne Sayegh, Enrique J. Vargas
  • Publication number: 20090154384
    Abstract: A mesh node of an infrastructure wireless local area network ‘WLAN’ is coupled to a battery which is coupled to a device that is able to harness energy from a source of renewable energy. Energy management of the mesh node includes conducting simulations of a system comprising the mesh node, the device, and the battery in its current state of charge, determining an admissible load for the mesh node from the simulations, and withholding communication services by the mesh node for one or more periods of time a cumulative duration of which is related to power consumption of the mesh node when handling the admissible load. The simulations involve meteorological data related to the source of renewable energy in the vicinity of the mesh node.
    Type: Application
    Filed: December 12, 2007
    Publication date: June 18, 2009
    Applicant: MCMASTER UNIVERSITY
    Inventors: Terence Douglas Todd, Amin Farbod, Amir Antoun Renne Sayegh
  • Publication number: 20080002605
    Abstract: A mobile communication device is able to communicate with wireless local area network and with a cellular network. A communication system is able to route a communication session between the mobile communication device and another communication device either by way of the wireless local area network or the cellular network. The communication system is able to trigger the mobile communication device via the cellular network to search for and attempt to connect to the wireless local area network. The mobile communication device, in response to reception of signaling via the cellular network, is able to activate a wireless local area network interface of the mobile communication device and to establish a connection to the wireless local area network.
    Type: Application
    Filed: June 28, 2006
    Publication date: January 3, 2008
    Applicants: RESEARCH IN MOTION LIMITED, MCMASTER UNIVERSITY
    Inventors: Terence Douglas Todd, Vytas Kezys
  • Publication number: 20070297357
    Abstract: A wireless access point advertises data rates that it supports. A mobile station is permitted to communicate with the access point at one or more of the lower data rates only if the mobile station satisfies one or more conditions.
    Type: Application
    Filed: June 26, 2006
    Publication date: December 27, 2007
    Applicants: RESEARCH IN MOTION LIMITED, MCMASTER UNIVERSITY
    Inventors: Terence Douglas Todd, Vytas Kezys, Mohammed N.A. Smadi
  • Publication number: 20070291732
    Abstract: A wireless local area network includes multiple access points with overlapping coverage, and modes of different power consumption are available to the access points. It is assessed whether the traffic load of the network may be adequately supported using fewer access points in an active mode. If so, the traffic load is redistributed from certain active access points among the remaining access points in the active mode. The certain access points are switched into a mode of lower power consumption than the active mode. Similarly, it is assessed whether the traffic load of the network is adequately supported by the current number of access points in an active mode. If not, certain access points which are in a mode of lower power consumption are switched to the active mode. The traffic load is redistributed among the access points in the active mode including the certain access points.
    Type: Application
    Filed: June 19, 2006
    Publication date: December 20, 2007
    Applicant: McMaster University
    Inventors: Terence Douglas Todd, Amir Antoun Renne Sayegh, Enrique J. Vargas
  • Publication number: 20070274259
    Abstract: A mobile station is assisted to perform a handoff from a current access point in a current extended service set (ESS) to a new access point in a target ESS. A HandOver Mediator, possibly in conjunction with a handover server, performs an authentication process and an association process with an access point in the target ESS while masquerading as the mobile station. Parameters resulting from the authentication process and the association process are then passed to the mobile station and the mobile station can perform a handoff to the new access point.
    Type: Application
    Filed: May 26, 2006
    Publication date: November 29, 2007
    Applicant: McMaster University
    Inventors: Amir Antoun Renne Sayegh, Terence Douglas Todd, Dongmei Zhao
  • Patent number: 6751691
    Abstract: An arrangement for data transfer between a desk top personal computer (1) and a peripheral or other data processing device (7) comprises a transfer pad (5) which comprises two conductive plates (8, 9) which is connected to the personal computer (1) via a lead (6). The peripheral or other data processing device (7) has a transfer pad (11) which comprises two conductive pads (12, 13) attached to or forming part of the lower wall of its housing. For data transfer to occur the two transfer pads are brought into close proximity so that they provide a capacitative coupling between the personal computer (1) and the peripheral or other data processing device (7).
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: June 15, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Terence A. Douglas
  • Patent number: 5434628
    Abstract: The apparatus includes first, second and third connectors, a control signal generator (5.11) and first and second switches (5.9, 5.10). The first and second connectors each have a signal input terminal, a signal output terminal and a control signal terminal. The third connector has a signal input terminal (5.7) and eventually a control signal terminal (5.8). The first and second switching means each have first (a), second (b) and third (c) terminals, the first terminal (a) of the first switches (5.9) being coupled to the signal output terminal (5.5) of the second connector, the second terminal (b) of the first switches (5.9) being coupled to the signal input terminal (5.1) of the first connector, the first terminal (a) of the second switching means (5.10) being coupled to the signal output terminal (5.2) of the first connector, the second terminal (b) of the second switching means (5.10) being coupled to the signal input terminal (5.4) of the second connector. The first and second switches (5.9, 5.
    Type: Grant
    Filed: June 28, 1994
    Date of Patent: July 18, 1995
    Assignee: U.S. Philips Corporation
    Inventors: Richard C. Spiero, Terence A. Douglas, Marnix C. Vlot
  • Patent number: 5349391
    Abstract: The apparatus includes first, second and third connectors, a control signal generator (5.11) and first and second switches (5.9, 5.10). The first and second connector each have a signal input terminal, a signal output terminal and a control signal terminal. The third connector has a signal input terminal (5.7) and eventually a control signal terminal (5.8). The first and second switches each have first (a), second (b) and third (c) terminals, the first terminal (a) of the first switches (5.9) being coupled to the signal output terminal (5.5) of the second connector, the second terminal (b) of the first switches (5.9) being coupled to the signal input terminal (5.1) of the first connector, the first terminal (a) of the second switches (5.10) being coupled to the signal output terminal (5.2) of the first connector, the second terminal (b) of the second switches (5.10) being coupled to the signal input terminal (5.4) of the second connector. The first and second switches (5.9, 5.
    Type: Grant
    Filed: March 4, 1993
    Date of Patent: September 20, 1994
    Assignee: U.S. Philips Corporation
    Inventors: Richard C. Spiero, Terence A. Douglas, Marnix C. Vlot
  • Patent number: 4570154
    Abstract: A data entry keyboard apparatus comprises a key-switch array (900) and associated electronic logic circuits (941). The key switches (901) of the array are so interconnected with each other and with connection terminals (902) to (905) of the logic circuits (941) that any one of these connection terminals can be interconnected with any other one by the actuation of an appropriate key-switch. The logic circuits (941) have a first set of coincidence gates (912) one for each key-switch (901). One input of each of these gates is connected to receive a particular one of a plurality of pulse signals of different phases produced by a pulse sequencer (906). A second input of each of these gates is connected to receive the same pulse signal via the key-switch array when the appertaining key-switch (901) is actuated. The coincidence or detection at an AND-gate of the same pulse signal at both inputs produces an output signal signifying actuation of the appertaining key-switch. The apparatus has n/2.times.
    Type: Grant
    Filed: May 4, 1983
    Date of Patent: February 11, 1986
    Assignee: U.S. Philips Corporation
    Inventors: John R. Kinghorn, Raymond J. Fisher, Terence A. Douglas
  • Patent number: 4231031
    Abstract: A remote control system for TV receiver control. The system uses infra-red transmission to trasmit an infra-red data pulse on each edge of a pulse duration signal comprising a coded pattern of binary 0 and 1 bits which are formed by pulses of respective different lengths. The original pulse duration signal can be reconstituted at a receiver by a bistable element which is responsive to the infra-red data pulses. Since the regenerated modulating waveform could be in anti-phase with the original modulating waveform, the sequence of data pulses is transmitted twice and an additional data pulse is transmitted between successive transmissions, so that one or the other of the two regenerated modulating waveforms must be in phase with the original modulating waveform.
    Type: Grant
    Filed: April 7, 1978
    Date of Patent: October 28, 1980
    Assignee: U.S. Philips Corporation
    Inventors: Gerald O. Crowther, Terence A. Douglas, Howard M. Farmer