Patents by Inventor Krishna GOMADAM
Krishna GOMADAM 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).
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Patent number: 10187125Abstract: Apparatuses, methods, and systems of a hybrid node are disclosed. One embodiment of the hybrid node includes a first sector and a second sector. The first sector is operative to transmit a signal through a predetermined transmission channel at each of a first plurality of transmit beam forming settings. The second sector is operative to receive the signal through the predetermined channel at a second plurality of receive beam forming settings for each of more than one of the first plurality of transmit beam forming settings. Further, the node is operative to measure a received signal quality of the received signal at each of the second plurality of receive beam forming settings of the second plurality of antenna elements, for each of the more than one of the first plurality of transmit beam forming settings of the first plurality of antenna elements.Type: GrantFiled: September 6, 2017Date of Patent: January 22, 2019Assignee: Facebook, Inc.Inventors: Sanjai Kohli, Djordje Tujkovic, Krishna Gomadam
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Patent number: 10177870Abstract: Apparatuses, methods, and systems of assigning codes are disclosed. One method includes selecting a plurality of available codes, grouping links of a wireless network into a plurality of groups based on connectivity of the links between sectors of the wireless network, characterizing interference between at least one link of a first group of the plurality of groups and at least one link of a second group of the plurality of groups, and assigning at least one code of the plurality of available codes to the first group and at least one other code of the plurality of available codes to the second group based on the characterizing of the interference.Type: GrantFiled: August 26, 2016Date of Patent: January 8, 2019Assignee: Facebook, Inc.Inventors: Vish Ponnampalam, Krishna Gomadam, Djordje Tujkovic
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Patent number: 10149337Abstract: Methods, apparatuses, and systems for transmitting information between nodes in a point-to-point wireless communication network is disclosed. One method includes constructing, by a sector of a transmitting node, a packet including data that is to be transmitted to a receiving node in the wireless network, wherein the constructed packet includes a short training field, a channel estimation field, a header field, and a data payload, and transmitting by the sector of the transmitting node, a jamming code before the short training field of the constructed packet, thereby reducing a likelihood that the receiving node will decode a different short training field of an interfering packet before the receiving node decodes the short training field of the constructed packet.Type: GrantFiled: December 18, 2016Date of Patent: December 4, 2018Assignee: Facebook, Inc.Inventors: Djordje Tujkovic, Krishna Gomadam, Vish Ponnampalam
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Patent number: 10148557Abstract: A wireless communication network includes a transmitting node and a receiving node configured to transmit and receive packets between the transmitting node and the receiving node through one or more of a plurality of predetermined micro-routes is disclosed. For an embodiment, the transmitting node is configured to retrieve a first micro-route, transmit packets in a first transmit beamforming direction associated with the first micro-route, transmit packets including one or more training signals in a second transmit beamforming direction associated with a second micro-route of the plurality of predetermined micro-routes that is different than the first transmit beamforming direction associated with the first micro-route, and receive feedback from the receiving node indicating that the second micro-route provides a better communication link than the first micro-route.Type: GrantFiled: December 18, 2016Date of Patent: December 4, 2018Assignee: Facebook, Inc.Inventors: Krishna Gomadam, Djordje Tujkovic, Sanjai Kohli
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Patent number: 10116375Abstract: A procedure to establish a link in a directional wireless system where two nodes cannot listen to each other unless optimized beamforming pair is used and timing and framing synchronization is acquired. The procedure determines a set of beamforming pairs that the nodes can use for communication in addition to acquiring the framing and timing synchronization. Training packets are periodically transmitted by a transmitter while a receiver listens in each of a number of receive directions. Training packets are sent N times in N directions while a receiver listens in each of M receive directions until all N×M possible transmit and receive direction pair possibilities are tried. The receiver informs the transmitter which transmit and receive direction pairs were successful in creating communication links between the nodes.Type: GrantFiled: May 25, 2017Date of Patent: October 30, 2018Assignee: Facebook, Inc.Inventors: Sanjai Kohli, Djordje Tujkovic, Krishna Gomadam
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Publication number: 20180007718Abstract: Apparatuses, methods, and systems of a node that supports a simultaneous bidirectional wireless link with a second node are disclosed. One embodiment of the node includes a first sector that includes a first transceiver and a first plurality of antennas operative to form a beam directed to a first sector of a second node. The node further includes a second sector that includes a second transceiver and a second plurality of antennas operative to form a beam directed to a second sector of the second node. For at least one time slot of a plurality of time slots, one of the first transceiver or the second transceiver is operative to transmit a first communication signal to the second node while the other of the first transceiver or the second transceiver is operative to receive a second communication signal from the second node.Type: ApplicationFiled: June 29, 2016Publication date: January 4, 2018Inventors: Djordje Tujkovic, Krishna Gomadam, Sanjai Kohli
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Publication number: 20180006686Abstract: Apparatuses, methods, and systems of a hybrid node are disclosed. One embodiment of the hybrid node includes a first sector and a second sector. The first sector is operative to transmit a signal through a predetermined transmission channel at each of a first plurality of transmit beam forming settings. The second sector is operative to receive the signal through the predetermined channel at a second plurality of receive beam forming settings for each of more than one of the first plurality of transmit beam forming settings. Further, the node is operative to measure a received signal quality of the received signal at each of the second plurality of receive beam forming settings of the second plurality of antenna elements, for each of the more than one of the first plurality of transmit beam forming settings of the first plurality of antenna elements.Type: ApplicationFiled: September 6, 2017Publication date: January 4, 2018Inventors: Sanjai Kohli, Djordje Tujkovic, Krishna Gomadam
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Patent number: 9787382Abstract: A system for transmitting information between nodes in a point-to-point wireless communication system. The system includes a node with an antenna array and a beamformer that is controllable to orient a main lobe of the antenna array in a desired direction. A spacing of the plurality of antenna elements in the array is adjustable to control a direction of a grating lobe of the antenna array to complete a communication link with a node in the network. Signals are simultaneously transmitted in the direction of the main lobe and the grating lobe to different nodes in the network.Type: GrantFiled: April 4, 2017Date of Patent: October 10, 2017Assignee: Facebook, Inc.Inventors: Djordje Tujkovic, Krishna Gomadam
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Patent number: 9787373Abstract: Apparatuses, methods, and systems of a hybrid node are disclosed. One embodiment of the hybrid node includes a first sector and a second sector. The first sector is operative to transmit a signal through a predetermined transmission channel at each of a first plurality of transmit beam forming settings. The second sector is operative to receive the signal through the predetermined channel at a second plurality of receive beam forming settings for each of more than one of the first plurality of transmit beam forming settings. Further, the node is operative to measure a received signal quality of the received signal at each of the second plurality of receive beam forming settings of the second plurality of antenna elements, for each of the more than one of the first plurality of transmit beam forming settings of the first plurality of antenna elements.Type: GrantFiled: June 29, 2016Date of Patent: October 10, 2017Assignee: Facebook, Inc.Inventors: Sanjai Kohli, Djordje Tujkovic, Krishna Gomadam
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Publication number: 20170264352Abstract: A procedure to establish a link in a directional wireless system where two nodes cannot listen to each other unless optimized beamforming pair is used and timing and framing synchronization is acquired. The procedure determines a set of beamforming pairs that the nodes can use for communication in addition to acquiring the framing and timing synchronization. Training packets are periodically transmitted by a transmitter while a receiver listens in each of a number of receive directions. Training packets are sent N times in N directions while a receiver listens in each of M receive directions until all N×M possible transmit and receive direction pair possibilities are tried. The receiver informs the transmitter which transmit and receive direction pairs were successful in creating communication links between the nodes.Type: ApplicationFiled: May 25, 2017Publication date: September 14, 2017Inventors: Sanjai Kohli, Djordje Tujkovic, Krishna Gomadam
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Publication number: 20170195913Abstract: Apparatuses, methods, and systems of mitigating packet interference are disclosed. One method includes receiving, by a sector, data to be transmitted over a specific wireless link of a wireless network, configuring a packet for transmission over the specific wireless link, wherein the packet includes a preamble, and the data, and transmitting, by the sector, the configured packet over the specific wireless link. Configuring the packet includes identifying a reference sequence based on the specific wireless link, and inserting the reference sequence into at least a portion of the preamble.Type: ApplicationFiled: August 26, 2016Publication date: July 6, 2017Inventors: Krishna Gomadam, Djordje Tujkovic, Vish Ponnampalam
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Publication number: 20170195025Abstract: A procedure to establish a link in a directional wireless system where two nodes cannot listen to each other unless optimized beamforming pair is used and timing and framing synchronization is acquired. The procedure determines a set of beamforming pairs that the nodes can use for communication in addition to acquiring the framing and timing synchronization. Training packets are periodically transmitted by a transmitter while a receiver listens in each of a number of receive directions. Training packets are sent N times in N directions while a receiver listens in each of M receive directions until all N×M possible transmit and receive direction pair possibilities are tried. The receiver informs the transmitter which transmit and receive direction pairs were successful in creating communication links between the nodes.Type: ApplicationFiled: December 31, 2015Publication date: July 6, 2017Inventors: Sanjai Kohli, Djordje Tujkovic, Krishna Gomadam
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Publication number: 20170195916Abstract: Methods, apparatuses, and systems for transmitting information between nodes in a point-to-point wireless communication network is disclosed. One method includes constructing, by a sector of a transmitting node, a packet including data that is to be transmitted to a receiving node in the wireless network, wherein the constructed packet includes a short training field, a channel estimation field, a header field, and a data payload, and transmitting by the sector of the transmitting node, a jamming code before the short training field of the constructed packet, thereby reducing a likelihood that the receiving node will decode a different short training field of an interfering packet before the receiving node decodes the short training field of the constructed packet.Type: ApplicationFiled: December 18, 2016Publication date: July 6, 2017Inventors: Djordje Tujkovic, Krishna Gomadam, Vish Ponnampalam
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Publication number: 20170195145Abstract: Apparatuses, methods, and systems of assigning codes are disclosed. One method includes selecting a plurality of available codes, grouping links of a wireless network into a plurality of groups based on connectivity of the links between sectors of the wireless network, characterizing interference between at least one link of a first group of the plurality of groups and at least one link of a second group of the plurality of groups, and assigning at least one code of the plurality of available codes to the first group and at least one other code of the plurality of available codes to the second group based on the characterizing of the interference.Type: ApplicationFiled: August 26, 2016Publication date: July 6, 2017Inventors: Vish Ponnampalam, Krishna Gomadam, Djordje Tujkovic
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Publication number: 20170195215Abstract: A wireless communication network includes a transmitting node and a receiving node configured to transmit and receive packets between the transmitting node and the receiving node through one or more of a plurality of predetermined micro-routes is disclosed. For an embodiment, the transmitting node is configured to retrieve a first micro-route, transmit packets in a first transmit beamforming direction associated with the first micro-route, transmit packets including one or more training signals in a second transmit beamforming direction associated with a second micro-route of the plurality of predetermined micro-routes that is different than the first transmit beamforming direction associated with the first micro-route, and receive feedback from the receiving node indicating that the second micro-route provides a better communication link than the first micro-route.Type: ApplicationFiled: December 18, 2016Publication date: July 6, 2017Inventors: Krishna Gomadam, Djordje Tujkovic, Sanjai Kohli
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Publication number: 20170195938Abstract: Apparatuses, methods, and systems for charactering and selecting micro-routes between nodes of a wireless network are disclosed. One method includes wirelessly communicating between a first node and a second node through a wireless link formed by at least one micro-route, determining a condition of the at least one micro-route, and selecting at least one other micro-route for communication between the first node and the second node based on a level of correlation between the at least one micro-route and the at least one other micro-route, after determining the condition.Type: ApplicationFiled: December 18, 2016Publication date: July 6, 2017Inventors: Krishna Gomadam, Djordje Tujkovic, Sanjai Kohli
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Patent number: 9647335Abstract: A system for transmitting information between nodes in a point-to-point wireless communication system. The system includes a node with an antenna array and a beamformer that is controllable to orient a main lobe of the antenna array in a desired direction. A spacing of the plurality of antenna elements in the array is adjustable to control a direction of a grating lobe of the antenna array to complete a communication link with a node in the network. Signals are simultaneously transmitted in the direction of the main lobe and the grating lobe to different nodes in the network.Type: GrantFiled: December 31, 2015Date of Patent: May 9, 2017Inventors: Djordje Tujkovic, Krishna Gomadam
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Patent number: 9544117Abstract: Embodiments provide systems and methods for adaptive reference signal mapping in wireless multi-access communication networks, including LTE, WLAN, WiMAX, Bluetooth, etc. In an embodiment, the reference signal mapping configuration is user equipment (UE) specific and can be configured semi-statically or dynamically according to one or more communication related parameters of the UE. The one or more parameters can include, without limitation, a modulation scheme used for communication with the UE, a modulation and coding scheme (MCS) used for communication with the UE, a distance of the UE relative to the base station, an antenna configuration at the UE, interference management capability of the UE, and a rank of the UE.Type: GrantFiled: February 25, 2014Date of Patent: January 10, 2017Assignee: Broadcom CorporationInventor: Krishna Gomadam
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Patent number: 9344167Abstract: Embodiments provide approaches for sub-sampling a two-component precoder codebook to reduce the overhead associated with signaling the codebook in periodic Channel State Information (CSI) reports from a user equipment (UE) to a base station. In one embodiment, a first component of the codebook is sub-sampled to accommodate a payload capacity of a Physical Uplink Control Channel (PUCCH) CSI Report of Type 1. In another embodiment, both the first component and the second component of the codebook are sub-sampled to accommodate a maximum payload capacity associated with a PUCCH CSI report.Type: GrantFiled: June 6, 2014Date of Patent: May 17, 2016Assignee: Broadcom CorporationInventors: Krishna Gomadam, Djordje Tujkovic
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Publication number: 20140362941Abstract: Embodiments provide approaches for sub-sampling a two-component precoder codebook to reduce the overhead associated with signaling the codebook in periodic Channel Stale Information (CSI) reports from a user equipment (UE) to a base station. In one embodiment, a first component of the codebook is sub-sampled to accommodate a payload capacity of a Physical Uplink Control Channel (PUCCH) CSI Report of Type 1. In another embodiment, both the first component and the second component of the codebook are sub-sampled to accommodate a maximum payload capacity associated with a PUCCH CSI report.Type: ApplicationFiled: June 6, 2014Publication date: December 11, 2014Applicant: Broadcom CorporationInventors: Krishna GOMADAM, Djordje TUJKOVIC