Patents by Inventor Christopher G. Lott

Christopher G. Lott 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: 9094979
    Abstract: Techniques for selecting a serving sector for a terminal based on server selection information in order to balance the load of sectors in a wireless communication system are described. The server selection information for each sector may be set based on the load of the sector and may be used to rank the sector for selection as a serving sector. In one design, a terminal may receive server selection information for multiple sectors. The server selection information for each sector may include an offset used to adjust a measurement made by the terminal for the sector, a priority of the sector for selection as a serving sector, a DRCLock set based on the load of the sector, etc. The terminal may determine received signal qualities of the sectors. The terminal may then select one of the sectors as a serving sector based on the server selection information and the received signal qualities of the sectors.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: July 28, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Ramin Rezaiifar, Rashid Ahmed A. Attar, Christopher G. Lott
  • Patent number: 9055545
    Abstract: Techniques for improving the capacity of a wireless communications system using interference cancellation (IC). In an early decoding and IC aspect, a frame transmitted from a user to a base station may be decoded prior to the entire frame being received by the base station. The remaining portion of the frame may then be re-constructed at the base station prior to its reception, and cancelled from the receive signal to reduce the interference to frames received from other users. In a power control aspect for early decoding and IC, the power control target level at a local base station may be adjusted in response to successfully early decoding a frame, without affecting the overall outer loop power control operation. Further aspects include late decoding techniques for utilizing the IC of other users' signals to improve the probability of decoding a given user's frames, as well as techniques for traffic channel demodulation using channel re-estimation.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: June 9, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Peter J. Black, Christopher G. Lott, Rashid A. Attar, Yu-Cheun Jou, Jun Ma
  • Patent number: 8797911
    Abstract: A wireless communications power saving method and apparatus is provided. The method includes establishing a circular buffer configured to maintain a number of most recently encountered frame delay times and waiting a frame delay time after receiving a further frame before the station enters a power save state. Frame delay time is a period equal to a largest most recently encountered frame delay period in the circular buffer. The method further determines, at a station, a dormancy time based on a number of data frames received since the station transitioned from an inactive mode to an active mode, a packet transmission rate, and a data frame time interval representing time between data frames received at the station, and causes the station to switch to a further inactive mode if a next packet is not received within the dormancy time after receipt of a previous packet.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: August 5, 2014
    Assignee: Qualcomm Incorporated
    Inventors: Linhai He, Rashid A. Attar, Christopher G. Lott, Donna Ghosh, Chaitanya Mannemala, Sunit Bhatia, Sudheer Konda, Gopal Chillariga
  • Patent number: 8792407
    Abstract: A wireless communications power saving method and apparatus is provided. The method includes, when no reverse link traffic exists and no forward link traffic has been received for a predetermined amount of time, establishing, at a terminal, a reverse link transmission pilot signal duty cycle, and boosting overhead channel signal transmission power during ON slots and gating overhead channel and pilot signal transmission power during OFF slots. The design further includes estimating, at the terminal, an available data transmission rate, determining an actual data transmission rate, setting a terminal transmission duty cycle for a next period based on the estimated available data transmission rate, the actual data transmission rate, and a margin of error, and transmitting data from the terminal according to the terminal transmission duty cycle.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: July 29, 2014
    Assignee: Qualcomm Incorporated
    Inventors: Jun Hu, Donna Ghosh, Christopher G. Lott, Rashid A. Attar, Linhai He
  • Publication number: 20140187248
    Abstract: Techniques for improving the capacity of a wireless communications system using interference cancellation (IC). In an early decoding and IC aspect, a frame transmitted from a user to a base station may be decoded prior to the entire frame being received by the base station. The remaining portion of the frame may then be re-constructed at the base station prior to its reception, and cancelled from the receive signal to reduce the interference to frames received from other users. In a power control aspect for early decoding and IC, the power control target level at a local base station may be adjusted in response to successfully early decoding a frame, without affecting the overall outer loop power control operation. Further aspects include late decoding techniques for utilizing the IC of other users' signals to improve the probability of decoding a given user's frames, as well as techniques for traffic channel demodulation using channel re-estimation.
    Type: Application
    Filed: November 8, 2013
    Publication date: July 3, 2014
    Applicant: Qualcomm Incorporated
    Inventors: Peter J. Black, Christopher G. Lott, Rashid A. Attar, Yu-Cheun Jou, Jun Ma
  • Patent number: 8645501
    Abstract: Methods and apparatus for obtaining web content are disclosed. The method includes identifying resources identified by domain name references that a user may request, obtaining a status of at least one operating condition that affects operations of the communication device, fetching, in advance of the user requesting the content, network addresses of the resources so as to resolve the domain name references, and adapting a level of the fetching based upon the at least one operating condition. The network addresses of the resources are cached so as to generate cached network addresses, and if the user requests the content, the cached network addresses are utilized to access the resources associated with the content.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: February 4, 2014
    Assignee: Qualcomm Innovation Center, Inc.
    Inventors: Donna Ghosh, Mark Bapst, Christopher G. Lott, Rashid A. Attar, George Cherian, Linhai He, Dinesh K. Garg
  • Patent number: 8611305
    Abstract: Techniques for improving the capacity of a wireless communications system using interference cancellation (IC). In an early decoding and IC aspect, a frame transmitted from a user to a base station may be decoded prior to the entire frame being received by the base station. The remaining portion of the frame may then be re-constructed at the base station prior to its reception, and cancelled from the receive signal to reduce the interference to frames received from other users. In a power control aspect for early decoding and IC, the power control target level at a local base station may be adjusted in response to successfully early decoding a frame, without affecting the overall outer loop power control operation. Further aspects include late decoding techniques for utilizing the IC of other users' signals to improve the probability of decoding a given user's frames, as well as techniques for traffic channel demodulation using channel re-estimation.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: December 17, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Peter J. Black, Christopher G. Lott, Rashid A. Attar, Yu-Cheun Jou, Jun Ma
  • Patent number: 8605801
    Abstract: In a wireless communication system where different frequency bands are deployed to generate various communication zones, pilot signal set management for a plurality of pilot signals generated from an additional coverage zone is based on identifying a preselected signal set from the plurality of pilot signals and determining whether a predetermined criterion is met.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: December 10, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Ramin Rezaiifar, Christopher G. Lott, Donna Ghosh, Peter J. Black, Rashid Ahmed A. Attar
  • Patent number: 8594252
    Abstract: Techniques for improving the capacity of a wireless communications system using interference cancellation (IC). In an early decoding and IC aspect, a frame transmitted from a user to a base station may be decoded prior to the entire frame being received by the base station. The remaining portion of the frame may then be re-constructed at the base station prior to its reception, and cancelled from the receive signal to reduce the interference to frames received from other users. In a power control aspect for early decoding and IC, the power control target level at a local base station may be adjusted in response to successfully early decoding a frame, without affecting the overall outer loop power control operation. Further aspects include late decoding techniques for utilizing the IC of other users' signals to improve the probability of decoding a given user's frames, as well as techniques for traffic channel demodulation using channel re-estimation.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: November 26, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Peter J. Black, Christopher G. Lott, Rashid A. Attar, Yu-Cheun Jou, Jun Ma
  • Patent number: 8559359
    Abstract: Systems and methodologies are described that facilitate quality of service (QoS) differentiation and/or prioritization across a plurality of base stations included in wireless communication systems. The system can include components and/or devices that obtain resource allocations for cells controlled by a local base station, ascertains whether or not the resource allocations satisfy quality of service targets associated with data flows traversing through cells controlled by the local base station, and dispatches inter cell interference coordination indicators to remote base stations that have a proximate relationship defined by an X2 channel between the local base station and the remote base stations.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: October 15, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Christopher G. Lott, Amir Farajidana
  • Publication number: 20130215812
    Abstract: A wireless communications power saving method and apparatus is provided. The method includes, when no reverse link traffic exists and no forward link traffic has been received for a predetermined amount of time, establishing, at a terminal, a reverse link transmission pilot signal duty cycle, and boosting overhead channel signal transmission power during ON slots and gating overhead channel and pilot signal transmission power during OFF slots. The design further includes estimating, at the terminal, an available data transmission rate, determining an actual data transmission rate, setting a terminal transmission duty cycle for a next period based on the estimated available data transmission rate, the actual data transmission rate, and a margin of error, and transmitting data from the terminal according to the terminal transmission duty cycle.
    Type: Application
    Filed: February 21, 2012
    Publication date: August 22, 2013
    Inventors: Jun Hu, Donna Ghosh, Christopher G. Lott, Rashid A. Attar, Linhai He
  • Publication number: 20130215788
    Abstract: A wireless communications power saving method and apparatus is provided. The method includes establishing a circular buffer configured to maintain a number of most recently encountered frame delay times and waiting a frame delay time after receiving a further frame before the station enters a power save state. Frame delay time is a period equal to a largest most recently encountered frame delay period in the circular buffer. The method further determines, at a station, a dormancy time based on a number of data frames received since the station transitioned from an inactive mode to an active mode, a packet transmission rate, and a data frame time interval representing time between data frames received at the station, and causes the station to switch to a further inactive mode if a next packet is not received within the dormancy time after receipt of a previous packet.
    Type: Application
    Filed: February 21, 2012
    Publication date: August 22, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Linhai He, Rashid A. Attar, Christopher G. Lott, Donna Ghosh, Chaitanya Mannemala, Sunit Bhatia, Sudheer Konda, Gopal Chillariga
  • Publication number: 20120284372
    Abstract: Methods and apparatus for obtaining web content are disclosed. The method includes identifying resources identified by domain name references that a user may request, obtaining a status of at least one operating condition that affects operations of the communication device, fetching, in advance of the user requesting the content, network addresses of the resources so as to resolve the domain name references, and adapting a level of the fetching based upon the at least one operating condition. The network addresses of the resources are cached so as to generate cached network addresses, and if the user requests the content, the cached network addresses are utilized to access the resources associated with the content.
    Type: Application
    Filed: May 5, 2011
    Publication date: November 8, 2012
    Applicant: QUALCOMM INNOVATION CENTER, INC.
    Inventors: Donna Ghosh, Mark Bapst, Christopher G. Lott, Rashid A. Attar, George Cherian, Linhai He, Dinesh K. Garg
  • Patent number: 8116283
    Abstract: An Access Network (AN) can send an acknowledge message (ACK) to an Access Terminal (AT) to indicate that the AN has successfully decoded the data received in the first set of slots of the first data packet. The AN can send a negative acknowledge message (NAK) to the AT to indicate that the AN has not successfully decoded the data received in the first set of slots of a first data packet. Based upon receipt of the NAK, the AT can resend the data by sending a second set of slots of the first data packet containing redundant data. Based upon receipt of the ACK, the AT can send a first set of slots of another packet. The AT can gate off for a predetermined period of time after sending the first set of slots of a first packet and before sending a next set of slots.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: February 14, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Peter J. Black, Jun Ma, Eduardo S. Esteves, Christopher G. Lott
  • Patent number: 8000284
    Abstract: An access terminal (206) configured for wireless communication with an access network (204) within a sector (1032). The access terminal (206) includes a transmitter (2608) for transmitting a reverse traffic channel to the access network (204), an antenna (2614) for receiving signals from the access network (204), a processor (2602) and memory (2604) in electronic communication with the processor (2602). Instructions stored in the memory (2604) implement a method of determining whether a current power allocation grant (1374) for a flow (1216) on the access terminal (206) has been received from the access network (204). If the current power allocation grant (1374) is still active, a current power allocation (1338a) for the flow is set equal to the current power allocation grant (1374). If the current power allocation grant (1374) has not been received, the current power allocation (1338a) for the flow is determined.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: August 16, 2011
    Assignee: QUALCOMM Incorporated
    Inventors: Christopher G. Lott, Naga Bhushan, Rashid A. Attar, Jilei Hou
  • Patent number: 7933235
    Abstract: An access terminal (206) configured for wireless communication with an access network (204) within a sector (1032). The access terminal includes a transmitter (2608) for transmitting a reverse traffic channel to the access network (204), an antenna (2614) for receiving signals from the access network (204), a processor (2602) and memory (2604) in electronic communication with the processor (2602). Instructions stored in the memory (2604) implement, for each flow (1216) of a plurality of flows on the access terminal (206), determining the flow's total available power (1238). The access terminal's total available power (1234) is determined by summing each flow's total available power (1238). A packet is transmitted to the access network (204) at a power level that does not exceed the access terminal's total available power (1234).
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: April 26, 2011
    Assignee: Qualcomm Incorporated
    Inventors: Christopher G. Lott, Naga Bhushan, Donna Ghosh, Rashid A. Attar
  • Publication number: 20100142479
    Abstract: Techniques for improving the capacity of a wireless communications system using interference cancellation (IC). In an early decoding and IC aspect, a frame transmitted from a user to a base station may be decoded prior to the entire frame being received by the base station. The remaining portion of the frame may then be re-constructed at the base station prior to its reception, and cancelled from the receive signal to reduce the interference to frames received from other users. In a power control aspect for early decoding and IC, the power control target level at a local base station may be adjusted in response to successfully early decoding a frame, without affecting the overall outer loop power control operation. Further aspects include late decoding techniques for utilizing the IC of other users' signals to improve the probability of decoding a given user's frames, as well as techniques for traffic channel demodulation using channel re-estimation.
    Type: Application
    Filed: September 22, 2009
    Publication date: June 10, 2010
    Applicant: QUALCOMM Incorporated
    Inventors: Peter J. Black, Christopher G. Lott, Rashid A. Attar, Yu-Cheun Jou, Jun Ma
  • Publication number: 20100061496
    Abstract: Techniques for improving the capacity of a wireless communications system using interference cancellation (IC). In an early decoding and IC aspect, a frame transmitted from a user to a base station may be decoded prior to the entire frame being received by the base station. The remaining portion of the frame may then be re-constructed at the base station prior to its reception, and cancelled from the receive signal to reduce the interference to frames received from other users. In a power control aspect for early decoding and IC, the power control target level at a local base station may be adjusted in response to successfully early decoding a frame, without affecting the overall outer loop power control operation. Further aspects include late decoding techniques for utilizing the IC of other users' signals to improve the probability of decoding a given user's frames, as well as techniques for traffic channel demodulation using channel re-estimation.
    Type: Application
    Filed: September 22, 2009
    Publication date: March 11, 2010
    Applicant: QUALCOMM Incorporated
    Inventors: Peter J. Black, Christopher G. Lott, Rashid A. Attar, Yu-Cheun Jou, Jun Ma
  • Publication number: 20090300458
    Abstract: An Access Network (AN) can send an acknowledge message (ACK) to an Access Terminal (AT) to indicate that the AN has successfully decoded the data received in the first set of slots of the first data packet. The AN can send a negative acknowledge message (NAK) to the AT to indicate that the AN has not successfully decoded the data received in the first set of slots of a first data packet. Based upon receipt of the NAK, the AT can resend the data by sending a second set of slots of the first data packet containing redundant data. Based upon receipt of the ACK, the AT can send a first set of slots of another packet. The AT can gate off for a predetermined period of time after sending the first set of slots of a first packet and before sending a next set of slots.
    Type: Application
    Filed: June 12, 2009
    Publication date: December 3, 2009
    Applicant: QUALCOMM Incorporated
    Inventors: Peter J. Black, Jun Ma, Eduardo S. Esteves, Christopher G. Lott
  • Publication number: 20090290652
    Abstract: In a wireless communication system where different frequency bands are deployed to generate various communication zones, pilot signal set management for a plurality of pilot signals generated from an additional coverage zone is based on identifying a preselected signal set from the plurality of pilot signals and determining whether a predetermined criterion is met.
    Type: Application
    Filed: May 15, 2009
    Publication date: November 26, 2009
    Applicant: QUALCOMM Incorporated
    Inventors: Ramin Rezaiifar, Christopher G. Lott, Donna Ghosh, Peter J. Black, Rashid Ahmed A. Attar