Patents by Inventor Krishna Sayana
Krishna Sayana 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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Publication number: 20200028543Abstract: A subscriber station configured to communicate with one or more base stations or other transmission points (TPs) in a wireless communication network is configured to receive, from the network, information associated with one or more of the TPs that are candidates for coordinated multipoint (CoMP) transmission with the subscriber station, to measure a plurality of channel quality values for each of the one or more TPs, and to report the measured channel quality values to the network.Type: ApplicationFiled: September 27, 2019Publication date: January 23, 2020Inventors: Boon Loong Ng, Gerardus Johannes Petrus van Lieshout, Young-Han Nam, Himke van der Velde, Jianzhong Zhang, Ying Li, Younsun Kim, Krishna Sayana
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Patent number: 10498404Abstract: A subscriber station configured to communicate with one or more base stations or other transmission points (TPs) in a wireless communication network is configured to receive, from the network, information associated with one or more of the TPs that are candidates for coordinated multipoint (CoMP) transmission with the subscriber station, to measure a plurality of channel quality values for each of the one or more TPs, and to report the measured channel quality values to the network.Type: GrantFiled: January 25, 2016Date of Patent: December 3, 2019Assignee: Samsung Electronics Co., Ltd.Inventors: Boon Loong Ng, Gerardus Johannes Petrus van Lieshout, Young-Han Nam, Himke van der Velde, Jianzhong Zhang, Ying Li, Younsun Kim, Krishna Sayana
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Patent number: 10361827Abstract: Coordinate multi-point (CoMP) transmission is facilitated by resolving collisions between feedback reporting. Based upon the conditions within the network, collision resolution may be by dropping a channel report during a subframe, multiplexing channel reports from a plurality of user equipment, compressing channel reports from a plurality of user equipment, and combined reporting, either through joint reports or by using carrier aggregation, for conditions between a user equipment and a plurality of transmission points. New signaling and reporting formats facilitate selection of a collision resolution suitable for current network conditions.Type: GrantFiled: December 15, 2014Date of Patent: July 23, 2019Assignee: Samsung Electronics Co., Ltd.Inventors: Krishna Sayana, Boon Loong Ng, Young-Han Nam, Thomas David Novlan, Jinkyu Han, Jianzhong Zhang, Hyojin Lee, Youn-Sun Kim
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Publication number: 20190123882Abstract: Arrangements disclosed here provide an LTE E-RAN employing a hierarchical architecture with a central controller controlling multiple LTE radio nodes (RNs). The RNs may be clustered within the small cell network. A fractional frequency reuse (“FFR”) scheme is provided that dynamically computes the FFR allocations at individual RNs and configures the corresponding schedulers within each RN to improve cell-edge users' experience. Once an FFR pattern has been generated and frequencies allocated, UE throughput can be emulated to predict the resulting bit rates for each UE. Using the prediction, a scheduler emulation may be run to predict the behavior of the system. The results of each cell may then be collected to generate the performance of the entire system, which may in turn be used to generate a new or modified FFR pattern, or new or modified clustering. Optimization of the performance results in an optimized FFR pattern.Type: ApplicationFiled: July 16, 2018Publication date: April 25, 2019Inventors: Han-Ting Chiang, Brian Dunn, Hithesh Nama, Krishna Sayana, Peter J. Worters
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Publication number: 20190098562Abstract: Methods and apparatuses indicate and identify quasi co-located reference signal ports. A method of identifying by a UE includes identifying, from downlink control information, a CSI-RS port that is quasi co-located with a DM-RS port assigned to the UE. The method includes identifying large scale properties for the assigned DM-RS port based on large scale properties for the CSI-RS port. The method includes performing channel estimation and/or time/frequency synchronization using the identified large scale properties for the DM-RS port. Another method for identifying by a UE includes identifying, from downlink control information, a CRS port that is quasi co-located with a CSI-RS port configured for the UE. The method includes identifying large scale properties for the configured CSI-RS port based on large scale properties for the CRS port. The method includes performing channel estimation and/or time/frequency synchronization using the identified large scale properties for the CSI-RS port.Type: ApplicationFiled: September 24, 2018Publication date: March 28, 2019Inventors: Boon Loong Ng, Krishna Sayana, Young-Han Nam, Jianzhong Zhang
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Patent number: 10097329Abstract: Arrangements disclosed here provide an LTE E-RAN employing a hierarchical architecture with a central controller controlling multiple LTE radio nodes (RNs). The RNs may be clustered within the small cell network. A fractional frequency reuse (“FFR”) scheme is provided that dynamically computes the FFR allocations at individual RNs and configures the corresponding schedulers within each RN to improve cell-edge users' experience. Once an FFR pattern has been generated and frequencies allocated, UE throughput can be emulated to predict the resulting bit rates for each UE. Using the prediction, a scheduler emulation may be run to predict the behavior of the system. The results of each cell may then be collected to generate the performance of the entire system, which may in turn be used to generate a new or modified FFR pattern, or new or modified clustering. Optimization of the performance results in an optimized FFR pattern.Type: GrantFiled: November 8, 2013Date of Patent: October 9, 2018Assignee: Spidercloud Wireless, Inc.Inventors: Han-Ting Chiang, Krishna Sayana, Brian Dunn, Hithesh Nama, Peter J. Worters
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Patent number: 10085202Abstract: Methods and apparatuses indicate and identify quasi co-located reference signal ports. A method of identifying by a UE includes identifying, from downlink control information, a CSI-RS port that is quasi co-located with a DM-RS port assigned to the UE. The method includes identifying large scale properties for the assigned DM-RS port based on large scale properties for the CSI-RS port. The method includes performing channel estimation and/or time/frequency synchronization using the identified large scale properties for the DM-RS port. Another method for identifying by a UE includes identifying, from downlink control information, a CRS port that is quasi co-located with a CSI-RS port configured for the UE. The method includes identifying large scale properties for the configured CSI-RS port based on large scale properties for the CRS port. The method includes performing channel estimation and/or time/frequency synchronization using the identified large scale properties for the CSI-RS port.Type: GrantFiled: April 19, 2013Date of Patent: September 25, 2018Assignee: Samsung Electronics Co., Ltd.Inventors: Boon Loong Ng, Krishna Sayana, Young-Han Nam, Jianzhong Zhang
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Patent number: 9912430Abstract: A method for transmitting a CSI feedback report to a serving cell comprises for time division duplex, configuring at least one periodic CSI process with a CSI reference source defined by a single downlink subframe n?nCQI_ref, wherein nCQI_ref is a smallest value greater than or equal to a positive integer nCQI_ref_min, such that it corresponds to a valid downlink subframe, wherein nCQI_ref_min varies based on a number of at least one periodic CSI process. A method for CSI feedback reporting to a base station comprises configuring not to accommodate, by a user equipment, the one or more aperiodic CSI requests arrived from a serving cell except a CSI request of CSI processes with lower indexes for each serving cell, wherein a number of the one or more CSI processes with a lower index (es) is determined based on a number of pending CSI reports.Type: GrantFiled: July 5, 2013Date of Patent: March 6, 2018Assignee: Samsung Electronics Co. Ltd.Inventors: Krishna Sayana, Younsun Kim, Hyojin Lee, Young-Han Nam, Jin-Kyu Han
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Patent number: 9867120Abstract: Methods and apparatuses indicate and identify quasi co-located reference signal ports. A method of identifying by a UE includes identifying, from downlink control information, a CSI-RS port that is quasi co-located with a DM-RS port assigned to the UE. The method includes identifying large scale properties for the assigned DM-RS port based on large scale properties for the CSI-RS port. The method includes performing channel estimation and/or time/frequency synchronization using the identified large scale properties for the DM-RS port. Another method for identifying by a UE includes identifying, from downlink control information, a CRS port that is quasi co-located with a CSI-RS port configured for the UE. The method includes identifying large scale properties for the configured CSI-RS port based on large scale properties for the CRS port. The method includes performing channel estimation and/or time/frequency synchronization using the identified large scale properties for the CSI-RS port.Type: GrantFiled: December 15, 2014Date of Patent: January 9, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Boon Loong Ng, Krishna Sayana, Young-Han Nam, Jianzhong Zhang
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Patent number: 9554281Abstract: Methods and systems are provided for allocating frequencies in a radio access network (RAN) that includes a plurality of radio nodes each associated with a cell and a services node operatively coupled to the radio nodes. In accordance with the method, the radio nodes (RNs) in the RAN are divided into a plurality of clusters of RNs. A fractional frequency reuse (FFR) pattern is generated for each cluster. Transmission resources are allocated to the radio nodes in each cluster in accordance with the respective FFR pattern that is generated for each cluster.Type: GrantFiled: November 8, 2013Date of Patent: January 24, 2017Assignee: SPIDERCLOUD WIRELESS, INC.Inventors: Han-Ting Chiang, Krishna Sayana, Brian Dunn, Hithesh Nama, Peter J. Worters
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Patent number: 9438321Abstract: A user equipment (UE) in a wireless network having two-dimensional antenna systems performs a method of codebook sampling. The method includes receiving from an eNodeB (eNB) an indication of a restricted subset M of vertical precoding matrices, wherein M is less than a total number of vertical precoding matrices N in a codebook, the codebook comprising a plurality of vertical precoding matrices and horizontal precoding matrices. The method also includes feeding back vertical precoding matrix indicators (V-PMI) to the eNB based on the restricted subset of vertical precoding matrices.Type: GrantFiled: July 11, 2013Date of Patent: September 6, 2016Assignee: Samsung Electronics Co., Ltd.Inventors: Thomas David Novlan, Krishna Sayana, Young-Han Nam, Jin-Kyu Han
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Patent number: 9408201Abstract: A method for CSI report transmission includes detecting a collision in a subframe, between a first PUCCH CSI report of one serving cell with which a UE is configured in one of transmission modes 1 to 9, and a second PUCCH CSI report of another serving cell with which the UE is configured in transmission mode 10. Upon the reporting types of the collided PUCCH CSI reports having a same priority, the method transmits the first PUCCH CSI report if the CSI process index of the second PUCCH CSI report has a positive value other than 1. A method for CSI report transmission includes configuring, via a higher layer, a UE configured in transmission mode 10 whether to create a respective CSI report(s) for each aperiodic CSI process or not, using an information element including at least three one-bit variables.Type: GrantFiled: June 5, 2015Date of Patent: August 2, 2016Assignee: Samsung Electronics Co., Ltd.Inventors: Young-Han Nam, Boon Loong Ng, Hyojin Lee, Krishna Sayana, Himke van der Velde, Jianzhong Zhang
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Publication number: 20160218778Abstract: A subscriber station configured to communicate with one or more base stations or other transmission points (TPs) in a wireless communication network is configured to receive, from the network, information associated with one or more of the TPs that are candidates for coordinated multipoint (CoMP) transmission with the subscriber station, to measure a plurality of channel quality values for each of the one or more TPs, and to report the measured channel quality values to the network.Type: ApplicationFiled: January 25, 2016Publication date: July 28, 2016Inventors: Boon Loong Ng, Gerardus Johannes Petrus van Lieshout, Young-Han Nam, Himke van der Velde, Jianzhong Zhang, Ying Li, Younsun Kim, Krishna Sayana
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Patent number: 9307521Abstract: Methods and apparatuses determine and indicate QCL behavior for or to a UE. A method for determining QCL behavior for the UE method includes, when configured in TM10 for a serving cell, determining whether a CRC for a PDSCH transmission scheduled by DCI format 1A is scrambled using a C-RNTI. The method also includes, in response to determining C-RNTI scrambling, determining whether a transmission scheme of the PDSCH transmission uses a non-MBSFN subframe configuration and whether the PDSCH transmission is transmitted on antenna port 0 or a TxD scheme is used. The method further includes, in response to determining the non-MBSFN subframe configuration and antenna port 0 or the TxD scheme being used, determining to use QCL behavior 1 for PDSCH reception. Additionally, the method includes, in response to determining a MBSFN subframe configuration and antenna port 7 being used, determining to use QCL behavior 2 for PDSCH reception.Type: GrantFiled: July 15, 2013Date of Patent: April 5, 2016Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Boon Loong Ng, Younsun Kim, Young-Han Nam, Hyojin Lee, Krishna Sayana
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Patent number: 9301175Abstract: Apparatuses and methods for indicating and performing interference measurements. A method for performing interference measurements includes identifying a CSI-IM configuration for the UE to perform interference measurement. The method includes determining whether the CSI-IM configuration includes a subset of a total number of frequency resources configured for CSI-IM in the wireless communication system. The method includes measuring interference based on the identified CSI-IM configuration. Additionally, the method includes sending feedback based on the measured interference. The method for performing interference measurements may also include determining whether to perform interference measurements based on all downlink subframes or only a portion of the downlink subframes. Additionally, the method may include performing interference measurement based on the subframe determination.Type: GrantFiled: October 30, 2013Date of Patent: March 29, 2016Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Young-Han Nam, Krishna Sayana, Boon Loong Ng, Younsun Kim, Yan Xin
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Patent number: 9246558Abstract: According to one embodiment, a subscriber station configured to communicate with one or more base stations in a wireless communication network. The subscriber station is configured to receive, from the network, information associated with one or more of the TPs that are candidates for coordinated multipoint (CoMP) transmission with the subscriber station, measure a plurality of channel quality values for each of the one or more TPs, and report to the network, the measured channel quality values.Type: GrantFiled: September 21, 2012Date of Patent: January 26, 2016Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Boon Loong Ng, Gerardus Johannes Petrus van Lieshout, Young-Han Nam, Himke van der Velde, Jianzhong Zhang, Ying Li, Younsun Kim, Krishna Sayana
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Patent number: 9185705Abstract: An apparatus includes a baseband signal processing block, processing circuitry, and at least one radio frequency (RF) communication module communicably coupled to the baseband signal processing block and configured to communicate using a selected mode of communication in a channel. The processing circuitry is configured to detect a sub-channel band of unavailable spectrum within the channel, the band of unavailable spectrum being less than a whole of the channel. The channel includes one contiguous band of frequencies divisible into at least two non-overlapping non-adjacent sub-channels. The processing circuitry is configured to select one mode of communication selected from a plurality of modes including: a carrier aggregation (CA) only mode, a multiple input multiple output (MIMO) only mode, and a carrier aggregation multiple input multiple output (CA-MIMO) hybrid mode.Type: GrantFiled: May 21, 2013Date of Patent: November 10, 2015Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sridhar Rajagopal, Richard Stirling-Gallacher, Krishna Sayana, Jianzhong Zhang, Farooq Khan
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Patent number: 9167585Abstract: A base station is configured to support communications with at least one user equipment (UE) configured for machine type communications (MTC). The base station includes processing circuitry configured to determine a transmission scheme based on a category of the at least one UE. The base station also includes a transmitter configured to transmit, using a determined transmission scheme, a physical downlink shared channel (PDSCH) in a reduced bandwidth to the at least one UE. The UE includes a receiver configured to receive a physical downlink shared channel (PDSCH) in a reduced bandwidth from at least one base station. The UE also includes processing circuitry configured to determine a transmission scheme utilized by at least one base station.Type: GrantFiled: May 17, 2013Date of Patent: October 20, 2015Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Krishna Sayana, Young-Han Nam
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Patent number: 9167580Abstract: For use in a wireless network, a method for scheduling a Downlink Pilot Time Slot (DwPTS) subframe is provided. The method comprises expanding Physical Resource Blocks (PRBs) in a subframe prior to a DwPTS subframe to include resource elements (REs) of the DwPTS subframe, a number of OFDM symbols of the DwPTS subframe being less than or equal to a threshold OFDM symbol number. The method further comprises facilitating for a UE to demodulate REs in a DwPTS subframe based on DeModulation Reference Signals (DMRS) transmitted in a downlink subframe prior to the DwPTS subframe.Type: GrantFiled: March 15, 2013Date of Patent: October 20, 2015Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Young-Han Nam, Boon Loong Ng, Krishna Sayana
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Publication number: 20150271812Abstract: A method for CSI report transmission includes detecting a collision in a subframe, between a first PUCCH CSI report of one serving cell with which a UE is configured in one of transmission modes 1 to 9, and a second PUCCH CSI report of another serving cell with which the UE is configured in transmission mode 10. Upon the reporting types of the collided PUCCH CSI reports having a same priority, the method transmits the first PUCCH CSI report if the CSI process index of the second PUCCH CSI report has a positive value other than 1. A method for CSI report transmission includes configuring, via a higher layer, a UE configured in transmission mode 10 whether to create a respective CSI report(s) for each aperiodic CSI process or not, using an information element including at least three one-bit variables.Type: ApplicationFiled: June 5, 2015Publication date: September 24, 2015Inventors: Young-Han Nam, Boon Loong Ng, Hyojin Lee, Krishna Sayana, Himke van der Velde, Jianzhong Zhang