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11.发明申请Resource Management with Device-Device Communication in Next Generation Cellular Networks 有权资源管理与下一代蜂窝网络中的设备设备通信公开(公告)号：US20150029908A1
公开(公告)日：2015-01-29
申请号：US14340263
申请日：2014-07-24
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan
CPC classification number: H04L5/0073 , H04W16/10
Abstract: At the beginning of every epoch the invention estimates the average traffic demand from cellular and device-to-device traffic in each sector in either DL or UL directions based on history from previous epochs. It partitions the network into interfering sectors and employing device-to-device traffic to determine the dynamic fractional frequency reuse FFR patterns for each of these clusters. Then, in every frame, for the set of sectors co-located at the same base station and instantaneous traffic demands, the invention solves the problem of device-to-device traffic placement and scheduling of cellular and device-to-device traffic jointly.
Abstract translation: 在每个时期的开始，本发明基于来自先前历史的历史来估计在DL或UL方向上的每个扇区中的蜂窝和设备到设备业务的平均业务需求。 它将网络划分为干扰扇区并采用设备到设备流量来确定每个这些集群的动态分数频率重用FFR模式。 然后，在每个帧中，对于同一基站处的一组扇区和瞬时业务需求，本发明解决了设备到设备的业务布置和蜂窝和设备到设备流量的调度的问题。
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公开(公告)号：US11620462B2
公开(公告)日：2023-04-04
申请号：US17202854
申请日：2021-03-16
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Eugene Chai , Sampath Rangarajan , Mohammad Rostami
Abstract: A method for product tagging is presented including emitting, by at least one RF backscatter transmitter, a dual-tone Radio Frequency (RF) signal embedded within a standardized RF signal on a frequency channel, reflecting and frequency shifting, by a passive RF backscatter tag associated with a product, the dual-tone RF signal to a different frequency channel, and reading, by at least one RF backscatter receiver, the product on the different frequency channel by detecting a distributed ambient backscatter signal generated by a reflection and frequency shifting of the dual-tone RF signal by the passive RF backscatter tag.
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公开(公告)号：US10936927B2
公开(公告)日：2021-03-02
申请号：US16743737
申请日：2020-01-15
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Eugene Chai , Sampath Rangarajan , Mohammad Rostami
Abstract: A product tagging system is provided. The product tagging system includes at least one RF backscatter transmitter configured to emit (i) a main carrier RF signal, and (ii) Radio Frequency (RF) signals on two frequencies whose summation forms a twin carrier RF signal. The product tagging system further includes a passive RF backscatter tag associated with a product and configured to reflect and frequency shift the main carrier RF signal to a different frequency using the twin carrier RF signal. The product tagging system also includes at least one RF backscatter receiver configured to read the product on the different frequency by detecting a distributed ambient backscatter signal generated by a reflection and frequency shifting of the main carrier RF signal by the passive RF backscatter tag.
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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：US20200018847A1
公开(公告)日：2020-01-16
申请号：US16582416
申请日：2019-09-25
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Eugene Chai , Sampath Rangarajan
Abstract: An in-store interaction and location system is provided. At least one RF backscatter transmitter, hosted on a device, is configured to emit a RF signal on a frequency. A set of passive RF backscatter tags, each associated with a respective one of a plurality of products in a given store area, is configured to reflect and frequency shift the RF signal to a different frequency. At least one RF backscatter receiver, hosted on another device, is configured to read the plurality of products on the different frequency by detecting a distributed ambient backscatter signal generated by a reflection and frequency shifting of the RF signal by the passive RF backscatter tag. At least one of the device and the other device is configured to maintain an inventory and a location of the plurality of products in the given store area and provide the inventory and location to a user device.
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Patent Agency Ranking
公开(公告)号：US20190317206A1
公开(公告)日：2019-10-17
申请号：US16381294
申请日：2019-04-11
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Eugene Chai , Sampath Rangarajan
Abstract: A product tagging system is provided. The product tagging system includes at least one RF backscatter transmitter configured to emit a Radio Frequency (RF) signal on a frequency. The product tagging system further includes a passive RF backscatter tag associated with a product and configured to reflect and frequency shift the RF signal to a different frequency. The product tagging system also includes at least one RF backscatter receiver configured to read the product on the different frequency by detecting a distributed ambient backscatter signal generated by a reflection and frequency shifting of the RF signal by the passive RF backscatter tag.
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公开(公告)号：US10331493B2
公开(公告)日：2019-06-25
申请号：US15340712
申请日：2016-11-01
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Rajesh Mahindra , Karthikeyan Sundaresan , Sampath Rangarajan
Abstract: A system and method are provided. The method includes a base station receiving a plurality of tasks from a plurality of user devices, each of the plurality of tasks involving a respective one of multiple sets of jobs. The method further includes a load balancer generating task allocations for the plurality of tasks, responsive to receiving the plurality of tasks from the base station. A unique task ID is generated for and assigned to each task, from which a task allocation is generated by the load balancer. The task allocations for the plurality of tasks are generated such that all the jobs received from a respective same one of the plurality of user devices are assigned to a same one of the worker entities in the set. The method also includes a set of worker entities performing the plurality of tasks in accordance with the task allocations.
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公开(公告)号：US10298671B2
公开(公告)日：2019-05-21
申请号：US15340768
申请日：2016-11-01
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Rajesh Mahindra , Karthikeyan Sundaresan , Sampath Rangarajan
IPC: H04L29/08
Abstract: A load balancing device and method are provided. The load balancing device includes a processor. The processor is configured to receive a plurality of tasks from a plurality of user devices, each of the plurality of tasks involving a respective one of multiple sets of sessions. The processor is further configured to generate a task ID for each of the plurality tasks using a randomization function, at least one task ID for at least one of the plurality of tasks changing over time responsive to one or more criterion. The processor is additionally configured to allocate the plurality of tasks amongst a set of worker entities such that all the sessions involved in the plurality of tasks received from a respective same one of the plurality of user devices is assigned to a same one of the worker entities in the set.
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公开(公告)号：US10296394B2
公开(公告)日：2019-05-21
申请号：US15362439
申请日：2016-11-28
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Rajesh Mahindra , Sampath Rangarajan , Karthikeyan Sundaresan
Abstract: Computer-implemented methods and a system are provided for distributing tasks between a plurality of processes in a computer network. A method includes distributing, by a load balancer in the computer network, tasks between the plurality of processes. The method further includes maintaining, by the load balancer, a registry for each of the tasks. For a given task, the registry indicates which of the plurality of processes to which the given task is distributed based on a hash function. The method also includes forming, by the load balancer, a respective set of registries for each of the plurality of processes, based on a set of thresholds. The method additionally includes redefining, by the load balancer, the set of thresholds when one of the plurality of processes ceases or a new process, added to the plurality of processes, commences.
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公开(公告)号：US10292054B2
公开(公告)日：2019-05-14
申请号：US15422085
申请日：2017-02-01
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Eugene Chai , Karthikeyan Sundaresan , Sampath Rangarajan
Abstract: Methods and a system are provided for enabling coexistence of WIFI and Long Term Evolution (LTE) in a wireless communication system. A method includes embedding in a data sequence, by a base station capable of transmitting and receiving LTE frames, a channel reservation packet that (i) is detectable by a WIFI receiver and (ii) reserves a particular one of a plurality of available unlicensed communication channels for a transmission duration of the data sequence. The method further includes transmitting, by the base station, the data sequence including the embedded channel reservation packet.
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