Patents by Inventor Chandra Sekhar Bontu

Chandra Sekhar Bontu 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: 10278202
    Abstract: Systems and methods related to scheduling for a cluster of cells controlled by a base station of a cellular communications network are disclosed. In some embodiments, a method of operation of a base station in a cellular communications network to provide scheduling for a cluster of cells controlled by the base station is provided. In some embodiments, the method of operation of the base station comprises identifying a first set of Radio Access Bearers (RABs) for cluster scheduling for a Transmit Time Interval (TTI) and a second set of RABs for individual cell scheduling for the TTI, where the first set of RABs and the second set of RABs are non-overlapping sets. The method further includes performing cluster scheduling for the first set of RABs for the TTI and performing individual cell scheduling for the second set of RABs for the TTI.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: April 30, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Chandra Sekhar Bontu, Peter Hazy, Patrick Lie Chin Cheong
  • Publication number: 20190116558
    Abstract: A method and network entity for extending communication coverage in a network between a network entity and a wireless device. The method includes determining that the wireless device qualifies for coverage extension, the determining including that deriving appropriate transmission parameters for the wireless devices results in one of a lowest possible or most robust modulation and coding scheme (MCS), and determining achievable transmission performance parameters for the wireless device. If the determined achievable transmission performance parameters do not meet a set of pre-established transmission criteria, the downlink transmission power to the wireless device is increased.
    Type: Application
    Filed: June 27, 2016
    Publication date: April 18, 2019
    Inventors: Chandra Sekhar BONTU, Peter HAZY, Michael MCKENNA
  • Publication number: 20190028233
    Abstract: A method and network node for performing link adaption are disclosed. In one embodiment, a channel state information, CSI, measurement is received from a wireless device. An information carrying capacity, ICC, over a number of scheduling blocks, SBs, for a plurality of modulation formats for a target criteria is determined based at least in part on the CSI measurement from the wireless device. A modulation format of the plurality of modulation formats with a maximum ICC is selected. A transport block size, TBS, is determined for the selected modulation format. Link adaptation is performed based on the determined TBS.
    Type: Application
    Filed: May 18, 2016
    Publication date: January 24, 2019
    Inventors: Chandra Sekhar BONTU, Michel CHAUVIN, Peter HAZY, Michael MCKENNA
  • Patent number: 10178596
    Abstract: A method at a user equipment for handover from a serving cell to a target cell, the method sending a measurement report to the serving cell; and transmitting a reconfiguration complete message to the target cell; wherein the measurement report includes downlink timing measurements for the target cell. Further, a method at a source network element for handover of a user equipment from the source network element to a target network element, the method receiving a measurement report from the user equipment; sending a handover request to the target network element; receiving a handover request acknowledgement from the target network element, the handover request acknowledgement including a reconfiguration message and at least one downlink subframe in which an uplink grant is expected at the target network element for the user equipment; and forwarding the reconfiguration message and at least one downlink subframe to the user equipment.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: January 8, 2019
    Assignee: BlackBerry Limited
    Inventors: Chandra Sekhar Bontu, Yi Song, Zhijun Cai
  • Publication number: 20180376475
    Abstract: A method is provided for communication in a wireless telecommunication system. The method comprises adaptively designating, by a network element following a frame-based communication protocol, for use as a secondary component carrier in a carrier aggregation scheme, at least a portion of radio resources on an unlicensed band.
    Type: Application
    Filed: May 25, 2018
    Publication date: December 27, 2018
    Inventors: Chandra Sekhar Bontu, Shalini Suresh Periyalwar
  • Patent number: 10159109
    Abstract: A node and method for extending a wake up time of a wireless user equipment (UE) are provided. The node includes a memory. The memory is configured to store data to be transmitted to the UE. The node includes a processor configured to determine if the memory is storing data to be transmitted to the UE, determine if the wake up time of the UE coincides with a periodic subframe, the periodic subframe occurring with a periodicity and cause transmission of a message for a grant to the UE if the determination is made that the memory is storing data to be transmitted to the UE and the wake up time of the UE coincides with the periodic subframe.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: December 18, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Prabaharan Kanesalingam, Chandra Sekhar Bontu, Alexander Langereis, Patrick Lie Chin Cheong
  • Patent number: 10154467
    Abstract: Systems and methods for user equipment (UE) transmit power adjustment for inter-device communication in wireless communication systems are provided. A UE may communicate directly with another UE over a direct inter-device communication link when they are located in proximity. The UE may adjust its transmit power for the inter-device communication during a device handshake/discovery procedure. For example, the UE may adjust its transmit power for the inter-device communication based on a data exchange between the UE and the other UE over the inter-device communication link. Long term evolution (LTE) downlink or uplink radio resources may be used for the data exchange over the inter-device communication link.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: December 11, 2018
    Assignee: BlackBerry Limited
    Inventors: Chandra Sekhar Bontu, Yi Song, Zhijun Cai
  • Publication number: 20180343630
    Abstract: Described herein is a system with a first network element and a second network element. The first network element contains a processor configured to synchronize with the second network element; and maintain synchronization with the second network element. The first network element is a small cell eNB and the second network element is one of the following: a macro cell enhanced node-B (eNB); or a small cell eNB.
    Type: Application
    Filed: May 24, 2018
    Publication date: November 29, 2018
    Inventors: Hua Xu, Shiwei Gao, Zhijun Cai, Chandra Sekhar Bontu, Yi Song, Yajun Zhu
  • Publication number: 20180337725
    Abstract: Systems and methods relating to adjusting uplink coverage in a cellular communications network are disclosed. In some embodiments, a method of operation of a network node to adjust uplink coverage for one or more cells in a cellular communications network comprises determining that there is a need to adjust uplink beam transformations for one or more cells of a plurality of cells in a cellular communications network. For each cell of the one or more cells, the uplink beam transformation for the cell is a transformation of received uplink signals for the cell from an antenna domain to a beam domain. The method further comprises, upon determining that there is a need to adjust the uplink beam transformations for the one or more cells, determining new uplink beam transformations for the one or more cells and applying the new uplink beam transformations for the one or more cells.
    Type: Application
    Filed: April 13, 2017
    Publication date: November 22, 2018
    Inventors: Alex Stephenne, Chandra Sekhar Bontu
  • Patent number: 10129812
    Abstract: A method for providing user agent data. The method includes an access node receiving an indicator sent from a relay node as an indication that the relay node has received data from the user agent.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: November 13, 2018
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, Chandra Sekhar Bontu, Yi Yu, Mo-Han Fong, Sophie Vrzic, James Earl Womack, Andrew Mark Earnshaw, Yi Song
  • Publication number: 20180254864
    Abstract: A node including processing circuitry including a processor, and a memory, the memory containing instructions that, when executed by the processor, configure the processor to: determine a cluster of a plurality of cells, assign at least one ZP CSI-RS configuration to each of the plurality of cells of the cluster, assign to each cell in the plurality of cells of the cluster a respective NZP CSI-RS configuration in which each of the NZP CSI-RS configurations assigned to respective cells in the cluster partially overlapping the at least one ZP CSI-RS configuration, and cause a first cell of the plurality of cells of the cluster to transmit, within a subframe, based on the at least one ZP CSI-RS configuration and the NZP CSI-RS configuration assigned to the first cell.
    Type: Application
    Filed: August 31, 2015
    Publication date: September 6, 2018
    Inventors: Chandra Sekhar BONTU, Girum Alebachew FANTAYE, Mercy GEORGE, Jianguo LONG, Hua XU
  • Publication number: 20180241521
    Abstract: A node for managing cell coordination is provided. The node includes processing circuitry including a processor, and a memory. The memory contains instructions that, when executed by the processor, configure the processor to determine a cluster of a plurality of cells including a first cell, the cluster of the plurality of cells having a plurality of antennas and determine a channel state information reference signal, CSI-RS, configuration corresponding to a total number of the plurality of antennas. The memory further includes instructions that, when executed by the processor, configure the processor to partition radio resources corresponding to the CSI-RS configuration into a plurality of partitioned radio resources, and cause the first cell to transmit at least one CSI-RS signal according to a first partition of the plurality of partitioned radio resources while muting the radio resources of the remaining plurality of partitioned resources.
    Type: Application
    Filed: August 11, 2015
    Publication date: August 23, 2018
    Inventors: Chandra Sekhar BONTU, Girum Alebachew FANTAYE, Mercy GEORGE, Jianguo LONG, Hua XU
  • Publication number: 20180242117
    Abstract: In some implementations, a method in a user equipment (UE) for supporting group communication service includes receiving, from a base station, a group communication on a Physical Downlink Shared Channel (PDSCH). The UE determines a first Hybrid Automatic Repeat reQuest (HARQ) information that corresponds to the group communication on the PDSCH. The UE transmits the first HARQ information. In some implementations, the UE determines a group Channel State Information (CSI) for a group communication that is transmitted by a base station on a PDSCH. The UE determines a unicast CSI for a unicast communication that is transmitted by the base station on the PDSCH. The UE transmits the group CSI. The UE transmits the unicast CSI.
    Type: Application
    Filed: April 20, 2018
    Publication date: August 23, 2018
    Applicant: BlackBerry Limited
    Inventors: Zhijun Cai, Chandra Sekhar Bontu, Yi Song
  • Publication number: 20180227946
    Abstract: A network element in a first cell in a wireless telecommunication network is provided. The network element comprises a processor configured such that the network element provides uplink and downlink grants in the first cell, wherein the first cell is a low-power cell within the coverage area of a second, high-power cell, and wherein the first cell acts as a secondary cell and the second cell acts as a primary cell in a carrier aggregation mode, and wherein at least one uplink control signal is received by one of only the first cell or both the first cell and the second cell.
    Type: Application
    Filed: March 13, 2018
    Publication date: August 9, 2018
    Inventors: Yi Song, Chandra Sekhar Bontu, Zhijun Cai
  • Patent number: 10028185
    Abstract: A method and relay node for managing a relay node that is moving relative to a source network node, the method receiving parameters of a target network node from a source network node at the relay node; initiating a direct attachment of the relay node to the target network node; and detaching the relay node from the source network node. Also, a method and network node for managing a relay node that is moving relative to a source network node, the method sending a handover request of a relay node from the source network node to a target network node; performing handover of a plurality of user equipments (UEs) from the source network node to the target network node, wherein the plurality of UEs are attached to the relay node, and establishing an interface between the relay node and the target network node.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: July 17, 2018
    Assignee: BlackBerry Limited
    Inventors: Yi Yu, Zhijun Cai, Yi Song, Yufei Wu Blankenship, Chandra Sekhar Bontu
  • Patent number: 10021704
    Abstract: According to certain embodiments, methods and systems for toggling transmission parameters in a heterogeneous network to achieve a target block error rate by a network node may include obtaining a signal-to-noise ratio (SINR) estimate from channel quality information for a downlink between a network node and a wireless device. For each of a first code word and a second code word to be transmitted on the downlink, a block error rate estimate may be obtained based on the SINR estimate. The network node may then determine at least one expected SINR for the first code word and the second code word. The at least one expected SINR may be determined as a function of the SINR estimate and the block error rate estimate. Based on the at least one expected SINR for the first code word and the second code word, a modulation and coding scheme (MCS) for obtaining a target block error rate may be selected.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: July 10, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Chandra Sekhar Bontu, Jianguo Long, Xixian Chen
  • Publication number: 20180192366
    Abstract: A method and system for adaptively powering down cells within a cluster are disclosed. According to one aspect, a method includes detecting when a load on a first cell falls below a first predetermined threshold, the load being based at least in part on a number of wireless devices in communication with a first radio unit serving the first cell. Upon detecting when a load on the first cell falls below the first predetermined threshold, a transmitter of the first radio unit is powered down over a period of time to allow time for handoff of wireless devices in the first cell to a second radio unit serving an adjacent cell.
    Type: Application
    Filed: July 22, 2015
    Publication date: July 5, 2018
    Inventors: Chandra Sekhar BONTU, Mercy GEORGE, Karl David MANN
  • Patent number: 9986559
    Abstract: A method is provided for communication in a wireless telecommunication system. The method comprises adaptively designating, by a network element following a frame-based communication protocol, for use as a secondary component carrier in a carrier aggregation scheme, at least a portion of radio resources on an unlicensed band.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: May 29, 2018
    Assignee: BlackBerry Limited
    Inventors: Chandra Sekhar Bontu, Shalini Suresh Periyalwar
  • Patent number: 9986524
    Abstract: Described herein is a system with a first network element and a second network element. The first network element contains a processor configured to synchronize with the second network element; and maintain synchronization with the second network element. The first network element is a small cell eNB and the second network element is one of the following: a macro cell enhanced node-B (eNB); or a small cell eNB.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: May 29, 2018
    Assignee: BlackBerry Limited
    Inventors: Hua Xu, Shiwei Gao, Zhijun Cai, Chandra Sekhar Bontu, Yi Song, Yajun Zhu
  • Patent number: 9973901
    Abstract: In some implementations, a method in a user equipment (UE) for supporting group communication service includes receiving, from a base station, a group communication on a Physical Downlink Shared Channel (PDSCH). The UE determines a first Hybrid Automatic Repeat reQuest (HARQ) information that corresponds to the group communication on the PDSCH. The UE transmits the first HARQ information. In some implementations, the UE determines a group Channel State Information (CSI) for a group communication that is transmitted by a base station on a PDSCH. The UE determines a unicast CSI for a unicast communication that is transmitted by the base station on the PDSCH. The UE transmits the group CSI. The UE transmits the unicast CSI.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: May 15, 2018
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, Chandra Sekhar Bontu, Yi Song