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公开(公告)号：US20200293040A1
公开(公告)日：2020-09-17
申请号：US16855179
申请日：2020-04-22
Applicant: NEC Laboratories America, Inc.
Inventor： Ayon Chakraborty , Karthikeyan Sundaresan , Sampath Rangarajan , Ashutosh Dhekne
Abstract: Systems and methods for localizing and tracking mobile objects are provided. A method includes determining an initial location of a node in a multi-hop network based on multi-lateration from an unmanned aerial vehicle. The method also includes applying an adaptive aperture to address a non-uniform velocity of the node based on the turn and a velocity vector. A determination whether localization for the node can be implemented using first hop nodes in the multi-hop network is made. In response to a determination that localization cannot be implemented using the first hop nodes, inertial sensor measurements associated with the node are accessed and the inertial sensor measurements are integrated with the adaptive aperture to improve localization accuracy.
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公开(公告)号：US11595934B2
公开(公告)日：2023-02-28
申请号：US17214188
申请日：2021-03-26
Applicant: NEC Laboratories America, Inc.
Inventor： Ayon Chakraborty , Karthikeyan Sundaresan , Sampath Rangarajan , Md. Shaifur Rahman
Abstract: Methods and systems for localization within an environment include determining a topology estimate of nodes located in a dynamic indoor environment, based on distances measured between the nodes. Rigid k-core sub-graphs of the topology estimate are generated to determine relative localizations of the nodes. Relative localizations are transformed into absolute localizations to generate a map of positions of the nodes within the environment. A feature of the map is deployed to a device in the environment.
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公开(公告)号：US11089432B2
公开(公告)日：2021-08-10
申请号：US16568747
申请日：2019-09-12
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Ayon Chakraborty , Sampath Rangarajan , Ashutosh Dhekne
Abstract: Systems and methods for localizing and tracking mobile objects are provided. The method includes determining an initial location of a node based on multi-lateration from an unmanned aerial vehicle and determining a velocity vector associated with the node based on multi-lateration. The method also includes detecting when the node turns. An adaptive aperture is applied to address a non-uniform velocity of the node based on the turn and the velocity vector.
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公开(公告)号：US10470243B2
公开(公告)日：2019-11-05
申请号：US16037536
申请日：2018-07-17
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Eugene Chai , Ayon Chakraborty , Sampath Rangarajan
IPC: H04W84/18 , B64C39/02 , H04B7/185 , H04W64/00 , H04W72/08 , H04W84/22 , H04W92/02 , H04W24/02 , H04W36/08 , H04W84/06
Abstract: A system for implementing a wireless communication network is provided. The system includes a plurality of unmanned aerial vehicles (UAVs) forming a wireless multi-hop mesh network constituting a backhaul. A given one of the UAVs includes a radio access network (RAN) agent configured to determine at least one UAV configuration for optimized coverage of one or more user equipment (UE) devices in a terrestrial zone, a haul agent configured to coordinate an optimization of the backhaul based at least in part on the at least one UAV configuration determined by the RAN agent, and a core agent configured to implement a distributed core architecture among the plurality of UAVs. The system further includes a controller configured to control the plurality of UAVs based on information received from at least one of the agents.
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公开(公告)号：US11388564B2
公开(公告)日：2022-07-12
申请号：US17000251
申请日：2020-08-21
Applicant: NEC Laboratories America, Inc.
Abstract: Aspects of the present disclosure describe systems, methods, and structures infrastructure-free RF tracking in dynamic indoor environments.
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Patent Agency Ranking
公开(公告)号：US11169518B2
公开(公告)日：2021-11-09
申请号：US16855179
申请日：2020-04-22
Applicant: NEC Laboratories America, Inc.
Inventor： Ayon Chakraborty , Karthikeyan Sundaresan , Sampath Rangarajan , Ashutosh Dhekne
Abstract: Systems and methods for localizing and tracking mobile objects are provided. A method includes determining an initial location of a node in a multi-hop network based on multi-lateration from an unmanned aerial vehicle. The method also includes applying an adaptive aperture to address a non-uniform velocity of the node based on the turn and a velocity vector. A determination whether localization for the node can be implemented using first hop nodes in the multi-hop network is made. In response to a determination that localization cannot be implemented using the first hop nodes, inertial sensor measurements associated with the node are accessed and the inertial sensor measurements are integrated with the adaptive aperture to improve localization accuracy.
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公开(公告)号：US20210306977A1
公开(公告)日：2021-09-30
申请号：US17214188
申请日：2021-03-26
Applicant: NEC Laboratories America, Inc.
Inventor： Ayon Chakraborty , Karthikeyan Sundaresan , Sampath Rangarajan , Md. Shaifur Rahman
Abstract: Methods and systems for localization within an environment include determining a topology estimate of nodes located in a dynamic indoor environment, based on distances measured between the nodes. Rigid k-core sub-graphs of the topology estimate are generated to determine relative localizations of the nodes. Relative localizations are transformed into absolute localizations to generate a map of positions of the nodes within the environment. A feature of the map is deployed to a device in the environment.
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8.发明授权公开(公告)号：US11054843B2
公开(公告)日：2021-07-06
申请号：US16289847
申请日：2019-03-01
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Eugene Chai , Sampath Rangarajan , Mohammad Khojastepour , Ayon Chakraborty
Abstract: A computer-implemented method, system, and computer program product are provided for positioning an unmanned autonomous vehicle (UAV) in a long term evolution radio access network. The method includes acquiring, by a processor-device, a position of the UAV with a global position system. The method also includes determining, by the processor-device, physical distances from the UAV to each of a plurality of user equipment (UE) responsive to a time-of-flight from the UAV to each of the plurality of UE. The method additionally includes generating, by the processor-device, radio environment maps for each of the plurality of UE with signal-to-noise ratios (SNR) from each of the plurality of UEs to the UAV. The method further includes selecting, by the processor-device, a determined position for the UAV as a position with a minimum SNR in the REMs. The method also includes commanding the UAV to move to the determined position.
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公开(公告)号：US20210067899A1
公开(公告)日：2021-03-04
申请号：US16568747
申请日：2019-09-12
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Ayon Chakraborty , Sampath Rangarajan , Ashutosh Dhekne
Abstract: Systems and methods for localizing and tracking mobile objects are provided. The method includes determining an initial location of a node based on multi-lateration from an unmanned aerial vehicle and determining a velocity vector associated with the node based on multi-lateration. The method also includes detecting when the node turns. An adaptive aperture is applied to address a non-uniform velocity of the node based on the turn and the velocity vector.
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10.发明申请公开(公告)号：US20190278302A1
公开(公告)日：2019-09-12
申请号：US16289847
申请日：2019-03-01
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Eugene Chai , Sampath Rangarajan , Mohammad Khojastepour , Ayon Chakraborty
Abstract: A computer-implemented method, system, and computer program product are provided for positioning an unmanned autonomous vehicle (UAV) in a long term evolution radio access network. The method includes acquiring, by a processor-device, a position of the UAV with a global position system. The method also includes determining, by the processor-device, physical distances from the UAV to each of a plurality of user equipment (UE) responsive to a time-of-flight from the UAV to each of the plurality of UE. The method additionally includes generating, by the processor-device, radio environment maps for each of the plurality of UE with signal-to-noise ratios (SNR) from each of the plurality of UEs to the UAV. The method further includes selecting, by the processor-device, a determined position for the UAV as a position with a minimum SNR in the REMs. The method also includes commanding the UAV to move to the determined position.
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