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).
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Patent number: 12219512Abstract: 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: GrantFiled: October 23, 2023Date of Patent: February 4, 2025Assignee: Malikie Innovations LimitedInventors: Hua Xu, Shiwei Gao, Yajun Zhu, Zhijun Cai, Chandra Sekhar Bontu, Yi Song
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Publication number: 20240056998Abstract: 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: ApplicationFiled: October 23, 2023Publication date: February 15, 2024Inventors: Hua Xu, Shiwei Gao, Yajun Zhu, Zhijun Cai, Chandra Sekhar Bontu, Yi Song
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Patent number: 11902957Abstract: A network node is provided. The network node includes processing circuitry configured to estimate spatial transmission information, STI, for each of a plurality of wireless devices, and determine spatial separability among the plurality of wireless devices based at least in part on the estimated STI for each of the plurality of wireless devices. The processing circuitry is further configured to cause scheduling of the plurality of wireless devices on the same communication resources based at least in part on the determined spatial separability.Type: GrantFiled: February 13, 2019Date of Patent: February 13, 2024Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Chandra Sekhar Bontu, Amr El-Keyi, Jagadish Ghimire, Hong Ren
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Patent number: 11871401Abstract: A network node is provided. The network node includes processing circuitry configured to estimate spatial transmission information, STI, for each of a plurality of wireless devices, and determine spatial separability among the plurality of wireless devices based at least in part on the estimated STI for each of the plurality of wireless devices. The processing circuitry is further configured to cause scheduling of the plurality of wireless devices on the same communication resources based at least in part on the determined spatial separability.Type: GrantFiled: February 13, 2019Date of Patent: January 9, 2024Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Chandra Sekhar Bontu, Amr El-Keyi, Jagadish Ghimire, Hong Ren
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Patent number: 11832201Abstract: 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: GrantFiled: June 13, 2022Date of Patent: November 28, 2023Assignee: MALIKIE INNOVATIONS LIMITEDInventors: Hua Xu, Shiwei Gao, Yajun Zhu, Zhijun Cai, Chandra Sekhar Bontu, Yi Song
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Publication number: 20220312356Abstract: 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: ApplicationFiled: June 13, 2022Publication date: September 29, 2022Inventors: Hua Xu, Shiwei Gao, Yajun Zhu, Zhijun Cai, Chandra Sekhar Bontu, Yi Song
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Patent number: 11457453Abstract: A method and system for performing link adaptation are disclosed. According to one aspect, a method in a wireless communication system for performing link adaptation is provided. The method includes, when a first measure of channel quality is higher than a first predetermined amount, using a first outer loop adjustment process directed to determining link adaptation for a first data transmission transmitted to a wireless device. The method also includes, when the first measure of channel quality is lower than a second predetermined amount, using a second outer loop adjustment process different from the first outer loop adjustment process directed to determining link adaptation for a second data transmission transmitted to the wireless device.Type: GrantFiled: June 7, 2016Date of Patent: September 27, 2022Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Xixian Chen, Chandra Sekhar Bontu, Jianguo Long, James Jianfeng Weng
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Patent number: 11411632Abstract: Systems and methods for estimating Signal-to-Noise Ratio (SNR) for Multi-User Multiple-Input and Multiple-Output (MU-MIMO) based on channel orthogonality. In some embodiments, a method performed by a radio access node includes obtaining a SU-MIMO signal quality measurement for at least a first user and an additional user; obtaining an indication of orthogonality between a channel of the first user and a channel of the additional user; and estimating a MU-MIMO signal quality measurement for the first user as if the first user and the additional user are paired with each other for a potential MU-MIMO transmission based on the SU-MIMO signal quality measurements and the indication of orthogonality. In this way, a computational complexity for the SINR estimation of MU-MIMO users can be greatly reduced. This may enable a large number of user pairing alternatives to be evaluated in practical wireless systems to achieve improved MU-MIMO performance.Type: GrantFiled: February 28, 2019Date of Patent: August 9, 2022Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Jianguo Long, Mats Åhlander, Chandra Sekhar Bontu, Yongquan Qiang, Hong Ren
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Patent number: 11395248Abstract: 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: GrantFiled: June 16, 2020Date of Patent: July 19, 2022Assignee: BlackBerry LimitedInventors: Hua Xu, Shiwei Gao, Yajun Zhu, Zhijun Cai, Chandra Sekhar Bontu, Yi Song
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Publication number: 20220124731Abstract: A network node is provided. The network node includes processing circuitry configured to estimate spatial transmission information, STI, for each of a plurality of wireless devices, and determine spatial separability among the plurality of wireless devices based at least in part on the estimated STI for each of the plurality of wireless devices. The processing circuitry is further configured to cause scheduling of the plurality of wireless devices on the same communication resources based at least in part on the determined spatial separability.Type: ApplicationFiled: February 13, 2019Publication date: April 21, 2022Inventors: Chandra Sekhar BONTU, Amr EL-KEYI, Jagadish GHIMIRE, Hong REN
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Publication number: 20220103248Abstract: 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: ApplicationFiled: December 14, 2021Publication date: March 31, 2022Inventors: Alex Stephenne, Chandra Sekhar Bontu
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Publication number: 20220085929Abstract: According to one aspect, a network node is provided. The network node includes processing circuitry configured to allocate resources for a reference signal signaling for a first wireless device, the allocated resources configured to separate, in a slot, at least one transmission layer of the first wireless device from at least one transmission layers of a second wireless device by at least one of scheduling the first wireless device and second wireless device different reference signal ports that are separated by using the same resource elements and different CDM codes, scheduling the first wireless device and second wireless device at least one shared reference signal port using the same resource elements and CDM code, and scheduling the first wireless device and second wireless device on different reference signal ports that are separated by FDM using different resource elements and the same CDM codes.Type: ApplicationFiled: December 26, 2018Publication date: March 17, 2022Inventors: Hong REN, Chandra Sekhar BONTU, Mattias FRENNE, Jagadish GHIMIRE
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Patent number: 11228364Abstract: 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: GrantFiled: April 13, 2017Date of Patent: January 18, 2022Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Alex Stephenne, Chandra Sekhar Bontu
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Patent number: 10979119Abstract: Embodiments of a method in a base station for precoding a downlink transmission are disclosed. In some embodiments, the method comprises obtaining, for a time instant k, an estimate of a channel matrix for a wireless channel for a downlink from the base station to a wireless device and projecting the estimate of the channel matrix onto one or more sets of spatial orthonormal functions, thereby obtaining respective sets of coefficients. The method further comprises, for each set of spatial orthonormal functions, filtering the set of coefficients for the time instant k based on a filtering parameter that is specific to a downlink channel to be transmitted. The method further comprises generating beamforming weights using the filtered set of coefficients for at least one of the sets of spatial orthonormal functions, and precoding the downlink channel using the beamforming weights.Type: GrantFiled: April 18, 2018Date of Patent: April 13, 2021Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Chandra Sekhar Bontu, Mats Åhlander, Magnus Hurd, Anders Johansson, Hong Ren
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Patent number: 10904877Abstract: 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: GrantFiled: May 25, 2018Date of Patent: January 26, 2021Assignee: BlackBerry LimitedInventors: Chandra Sekhar Bontu, Shalini Suresh Periyalwar
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Patent number: 10904713Abstract: 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: GrantFiled: April 20, 2018Date of Patent: January 26, 2021Assignee: BlackBerry LimitedInventors: Zhijun Cai, Chandra Sekhar Bontu, Yi Song
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Patent number: 10897334Abstract: 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: GrantFiled: August 31, 2015Date of Patent: January 19, 2021Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)Inventors: Chandra Sekhar Bontu, Girum Alebachew Fantaye, Mercy George, Jianguo Long, Hua Xu
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Publication number: 20210006316Abstract: Systems and methods for estimating Signal-to-Noise Ratio (SNR) for Multi-User Multiple-Input and Multiple-Output (MU-MIMO) based on channel orthogonality. In some embodiments, a method performed by a radio access node includes obtaining a SU-MIMO signal quality measurement for at least a first user and an additional user; obtaining an indication of orthogonality between a channel of the first user and a channel of the additional user; and estimating a MU-MIMO signal quality measurement for the first user as if the first user and the additional user are paired with each other for a potential MU-MIMO transmission based on the SU-MIMO signal quality measurements and the indication of orthogonality. In this way, a computational complexity for the SINR estimation of MU-MIMO users can be greatly reduced. This may enable a large number of user pairing alternatives to be evaluated in practical wireless systems to achieve improved MU-MIMO performance.Type: ApplicationFiled: February 28, 2019Publication date: January 7, 2021Inventors: Jianguo Long, Mats Åhlander, Chandra Sekhar Bontu, Yongquan Qiang, Hong Ren
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Publication number: 20200403673Abstract: Embodiments of a method in a base station for precoding a downlink transmission are disclosed. In some embodiments, the method comprises obtaining, for a time instant k, an estimate of a channel matrix for a wireless channel for a downlink from the base station to a wireless device and projecting the estimate of the channel matrix onto one or more sets of spatial orthonormal functions, thereby obtaining respective sets of coefficients. The method further comprises, for each set of spatial orthonormal functions, filtering the set of coefficients for the time instant k based on a filtering parameter that is specific to a downlink channel to be transmitted. The method further comprises generating beamforming weights using the filtered set of coefficients for at least one of the sets of spatial orthonormal functions, and precoding the downlink channel using the beamforming weights.Type: ApplicationFiled: April 18, 2018Publication date: December 24, 2020Inventors: Chandra Sekhar BONTU, Mats ÅHLANDER, Magnus HURD, Anders JOHANSSON, Hong REN
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Patent number: 10856233Abstract: 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: GrantFiled: June 27, 2016Date of Patent: December 1, 2020Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Chandra Sekhar Bontu, Peter Hazy, Michael McKenna