Patents by Inventor Kenneth A. Stewart

Kenneth A. Stewart 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: 8934417
    Abstract: A wireless communication terminal including a controller coupled to a transceiver, configured to receive a first and second control messages on an anchor carrier is disclosed. The first control message includes a resource assignment for the anchor carrier and the second control message is associated with a set of component carriers that are distinct from the anchor carrier. The controller determines a resource assignment for at least one component carrier in the set of component carriers using both the first and the second control messages.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: January 13, 2015
    Assignee: Google Technology Holdings LLC
    Inventors: Ravikiran Nory, Ravi Kuchibhotla, Robert T. Love, Vijay Nangia, Ajit Nimbalker, Kenneth A. Stewart, Xiangyang Zhuang
  • Patent number: 8934500
    Abstract: In a method for scheduling resources, the method includes receiving a first control channel in a first subframe (426) as a part of wireless communication between a user equipment (102) and a network equipment (110) using a first type of radio access technology wherein the first control channel (408) includes a first scheduling grant for scheduling resources in a second subframe (424) using a second type of radio access technology. The method also includes receiving a second control channel in the first subframe using the first type of radio access technology wherein the second control channel includes a second scheduling grant for the scheduling resources in the first subframe using the first type of radio access technology.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: January 13, 2015
    Assignee: Motorola Mobility LLC
    Inventors: Robert T. Love, Ajit Nimbalker, Ravikiran Nory, Kenneth A. Stewart
  • Patent number: 8873650
    Abstract: A method for configurable spatial channel information feedback in wireless communication systems is disclosed including receiving, at the wireless communication device, transmission from a plurality of antennas, receiving an indication of a feedback mode for feeding back spatial channel information that is based on correlations among at least some of the plurality of antennas, decomposing a correlation matrix representative of the correlations among at least some of the plurality of antennas into at least two Kronecker components, and feeding back parameters representative of the Kronecker components according to the feedback mode indicated.
    Type: Grant
    Filed: October 12, 2009
    Date of Patent: October 28, 2014
    Assignee: Motorola Mobility LLC
    Inventors: Xiangyang Zhuang, Krishna Kamal Sayana, Kenneth A Stewart
  • Patent number: 8787510
    Abstract: A method, a mobile system, and a user device for determining a delay spread are disclosed. A memory 306 may store a compound test value based on a multiburst history. The multiburst history may be a set of power delay profile decisions. A processor 304 may create a short power delay profile channel estimate and a long power delay profile channel estimate. The processor 304 may select a chosen power delay profile channel estimate based on the compound test value.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: July 22, 2014
    Assignee: Motorola Mobility LLC
    Inventors: Sandeep Krishnamurthy, Colin Frank, Kenneth Stewart
  • Publication number: 20140198765
    Abstract: Various methods for controlling an aggressor user equipment (UE) can use two transmission power control loops to mitigate UE-to-UE adjacent carrier frequency band interference to a geographically proximal victim UE. The aggressor UE can select between different transmission power parameters based on two (or more) power values. The usage of any particular power value depends on the time period of the transmission. For example, if a proximal victim UE is scheduled to receive when the aggressor UE is scheduled to transmit, a lower power value may be selected as instructed by a co-scheduler or determined by the aggressor UE. The aggressor UE can also send dual power headroom reports to its serving base station based on the two power values.
    Type: Application
    Filed: March 14, 2014
    Publication date: July 17, 2014
    Applicant: Motorola Mobility LLC
    Inventors: Sandeep H. Krishnamurthy, Robert T. Love, Ajit Nimbalker, Ravikiran Nory, Kenneth A. Stewart
  • Patent number: 8780779
    Abstract: Various methods and apparatuses provide unicast channel data acquisition, such as antenna information, from MBMS subframes. A method of operating a wireless communications network infrastructure entity is disclosed comprising transmitting a subframe (300) comprising a unicast symbol (301) in a first predetermined symbol position within said subframe (300), said unicast symbol (301) comprising a first antenna reference information; defining said first antenna reference information as a second antenna reference information; and transmitting a second subframe comprising a second unicast symbol in a second predetermined symbol position within said second subframe, said second unicast symbol comprising said second antenna reference information.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: July 15, 2014
    Assignee: Motorola Mobility LLC
    Inventors: Michael E. Buckley, Brian K. Classon, Kenneth A. Stewart
  • Patent number: 8780937
    Abstract: During operation radio frames are divided into a plurality of subframes. A frame duration is selected from two or more possible frame durations. Further, a subframe type is selected from two or more types of subframes. Data is placed within the plurality of subframes and is transmitted over the radio frames.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: July 15, 2014
    Assignee: Motorola Mobility LLC
    Inventors: Brian K. Classon, Kevin L. Baum, Amitava Ghosh, Robert T. Love, Vijay Nangia, Kenneth A. Stewart
  • Patent number: 8780690
    Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted including a plurality of sequence elements interleaved in time and frequency. The synchronization channel signal sequence elements enable an initial acquisition and cell search method with low computational load by providing predetermined time domain symmetry for common sequence elements in OFDMA symbol periods for OFDMA symbol timing detection and frequency error detection in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: July 15, 2014
    Assignee: Motorola Mobility LLC
    Inventors: Hidenori Akita, Masaya Fukuta, Hiroshi Hayashi, Kevin L. Baum, Brian K. Classon, Vijay Nangia, Robert T. Love, Kenneth A. Stewart
  • Patent number: 8767525
    Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted within a localized portion of a bandwidth of the OFDMA signal, the synchronization channel signal having predetermined time domain symmetry within the localized portion of the bandwidth and including information for providing at least partial cell identification information. The synchronization channel signal enables an initial acquisition and cell search method with low computational load which provides OFDMA symbol timing detection and frequency error detection and frame boundary detection and cell specific information detection in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: July 1, 2014
    Assignee: Motorola Mobility LLC
    Inventors: Hidenori Akita, Kevin L. Baum, Brian K. Classon, Massaya Fukuta, Hiroshi Hayashi, Vijay Nangia, Robert T. Love, Kenneth A. Stewart
  • Patent number: 8750190
    Abstract: A method and apparatus for interrupting a transmission of a multicast signal includes a common channel selector (106) coupled to a receiver (102) to receive common channel information (116) therefrom. A repetition value calculator (108) receives measurement occasion information (118) from the common channel selector (106) to calculate a repetition factor (120). A system frame number comparator (110) determines if a channel measurement occasion (128) should be performed based on the repetition factor (120), a common identifier (124) and a largest common channel transmission time interval (122). The method and apparatus further includes a measurement occasion generator (112) coupled to the system frame number comparator (110), wherein if a measurement occasion is to be performed, a measurement occasion command signal (126) is provided to the measurement occasion generator (112) and the measurement occasion generator generates the channel measurement occasion (128).
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: June 10, 2014
    Assignee: Motorola Mobility LLC
    Inventors: Richard C. Burbidge, Ravi Kuchibhotla, Padmaja Putcha, Kenneth A. Stewart
  • Patent number: 8730925
    Abstract: A base station communicates a positioning reference signal (PRS) to wireless communication devices over a downlink in a wireless communication system by encoding a PRS into a first set of transmission resources, encoding other information into a second set of transmission resources, multiplexing the two sets of resources into a subframe such that the first set of resources is multiplexed into at least a portion of a first set of orthogonal frequency division multiplexed (OFDM) symbols based on an identifier associated with the base station and the second set of resources is multiplexed into a second set of OFDM symbols. Upon receiving the subframe, a wireless communication device determines which set of transmission resources contains the PRS based on the identifier associated with the base station that transmitted the subframe and processes the set of resources containing the PRS to estimate timing (e.g., time of arrival) information.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: May 20, 2014
    Assignee: Motorola Mobility LLC
    Inventors: Colin D. Frank, Sandeep H. Krishnamurthy, Kenneth A. Stewart, Xiangyang Zhuang, Robert T. Love
  • Patent number: 8724492
    Abstract: A method and apparatus for a co-scheduler can mitigate UE-to-UE adjacent carrier frequency band interference by allocating three sets to a first user equipment uplink. Each set has at least one sub-carrier in a first frequency band, at least one uplink time period, and at least one transmission power parameter. The co-scheduler initially allocates the first set. The co-scheduler allocates the second set in response to detecting a second user equipment operating proximal to the first user equipment, and the second set differs from the first set in either at least one sub-carrier or at least one transmission power parameter. The co-scheduler allocates the third set in response to detecting that the second user equipment is no longer operating proximal to the first user equipment, and the third set differs from the second set in either at least one sub-carrier or at least one transmission power parameter.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: May 13, 2014
    Assignee: Motorola Mobility LLC
    Inventors: Colin D Frank, Sandeep H Krishnamurthy, Robert T Love, Ajit Nimbalker, Ravikiran Nory, Kenneth A Stewart
  • Publication number: 20140044064
    Abstract: A method in a wireless communication terminal (103), including receiving a radio resource allocation comprising a plurality of sub-carriers that is a subset of available sub-carriers, wherein the available sub-carriers include a DC sub-carrier, wherein the DC sub-carrier and all but one edge-most sub-carrier of the plurality of sub-carriers are designated for transmission if the DC sub-carrier is between any two sub-carriers of the allocation, and all of the sub-carriers except the DC sub-carrier from the plurality of sub-carriers are designated for transmission if the DC sub-carrier is not between any two sub-carriers of the allocation.
    Type: Application
    Filed: August 7, 2013
    Publication date: February 13, 2014
    Inventors: VIJAY NANGIA, KEVIN L. BAUM, BRIAN K. CLASSON, HYEJUNG JUNG, ROBERT T. LOVE, KENNETH A. STEWART
  • Patent number: 8605615
    Abstract: A method (500) and apparatus for multi-radio coexistence has a victim user equipment (UE) that receives (515) a sequence of subframes at a first transceiver from a serving base station, measures (520) channel state on the subframes to obtain channel state measurements, determines (530) a high-low interference pattern based on the channel state measurements, and transmits (550) to the serving base station a report that includes an indicator related to the high-low interference pattern. The method can include the victim UE receiving (610) an aggressor reference waveform (ARW) from the second transceiver, determining (620) spatial characteristics of the second transceiver from the ARW, and configuring (630) its antenna system based on the spatial characteristics. The method can have the victim UE determining (640) second transceiver characteristics from the ARW and transmitting (650) information regarding the second transceiver characteristics to its serving base station.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: December 10, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Colin D Frank, Sandeep H Krishnamurthy, Robert T Love, Ajit Nimbalker, Ravikiran Nory, Kenneth A Stewart
  • Publication number: 20130315168
    Abstract: A base station communicates a positioning reference signal (PRS) to wireless communication devices over a downlink in a wireless communication system by encoding a PRS into a first set of transmission resources, encoding other information into a second set of transmission resources, multiplexing the two sets of resources into a subframe such that the first set of resources is multiplexed into at least a portion of a first set of orthogonal frequency division multiplexed (OFDM) symbols based on an identifier associated with the base station and the second set of resources is multiplexed into a second set of OFDM symbols. Upon receiving the subframe, a wireless communication device determines which set of transmission resources contains the PRS based on the identifier associated with the base station that transmitted the subframe and processes the set of resources containing the PRS to estimate timing (e.g., time of arrival) information.
    Type: Application
    Filed: July 30, 2013
    Publication date: November 28, 2013
    Inventors: Colin Frank, Sandeep H. Krishnamurthy, Kenneth A. Stewart, Ziangyang Zhuang, Robert T. Love
  • Patent number: 8582538
    Abstract: A wireless user terminal includes a controller communicably coupled to a transceiver. The controller is configured to determine scheduling grant information and additional scheduling grant information from a channel encoded scheduling grant received at the transceiver, wherein the channel encoded scheduling grant includes encoded parity bits combined with the scheduling grant information and the encoded parity bits include the additional scheduling grant information exclusive OR-ed with parity bits obtained from the scheduling grant information.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: November 12, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Robert T Love, Ravi Kuchibhotla, Vijay Nangia, Ajit Nimbalker, Kenneth A Stewart
  • Publication number: 20130294343
    Abstract: A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted within a localized portion of a bandwidth of the OFDMA signal, the synchronization channel signal having predetermined time domain symmetry within the localized portion of the bandwidth and including information for providing at least partial cell identification information. The synchronization channel signal enables an initial acquisition and cell search method with low computational load which provides OFDMA symbol timing detection and frequency error detection and frame boundary detection and cell specific information detection in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.
    Type: Application
    Filed: July 5, 2013
    Publication date: November 7, 2013
    Inventors: Hidenori Akita, Kevin L. Baum, Brian K. Classon, Massaya Fukuta, Hiroshi Hayashi, Vijay Nangia, Robert T. Love, Kenneth A. Stewart
  • Patent number: 8542619
    Abstract: A method and apparatus for performing mobility measurement in a communication network (100) is described. The method comprises of receiving a subframe sequence pattern from a node in the communication network (100). The subframe sequence pattern indicates types of subframes being transmitted by a neighboring cell node (104) in a neighboring cell (112). The method includes receiving a subframe from a sequence of subframes transmitted by the neighboring cell node (104) in the neighboring cell (112), and determining that the received subframe is a multicast subframe based on the subframe sequence pattern. The method then includes performing a single cell-specific reference symbol measurement in response to determining that the received subframe is the multicast subframe.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: September 24, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Kenneth A. Stewart, Jean-Aicard Fabien, Michael E. Buckley, Raja S. Bachu
  • Patent number: 8537724
    Abstract: A method in a relay node operating in a time division duplex system wherein the relay node transmits downlink pilot timeslot information to a user terminal in a first temporal region of a special sub-frame, communicates with a base station during a second temporal region of the special sub-frame, and configures a third temporal region of the special sub-frame, wherein the second temporal region is configured as a guard period for communications between the relay node and the user terminal.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: September 17, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Robert T. Love, Jialing Liu, Vijay Nangia, Ajit Nimbalker, Ravikiran Nory, Kenneth A. Stewart, Xiangyang Zhuang
  • Patent number: 8509323
    Abstract: A method in a wireless communication terminal includes receiving a radio resource allocation having a plurality of sub-carriers that are a subset of available sub-carriers. The available sub-carriers include a DC sub-carrier wherein the DC sub-carrier and all but one edge-most sub-carrier of the plurality of sub-carriers are designated for transmission if the DC sub-carrier is between any two sub-carriers of the allocation, and all of the sub-carriers except the DC sub-carrier are designated for transmission if the DC sub-carrier is not between any two sub-carriers of the allocation.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: August 13, 2013
    Assignee: Motorola Mobility LLC
    Inventors: Vijay Nangia, Kevin L. Baum, Brian K. Classon, Hyejung Jung, Robert T. Love, Kenneth A. Stewart