公开(公告)号：US11132596B2

公开(公告)日：2021-09-28

申请号：US16848235

申请日：2020-04-14

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour

IPC: H04Q5/22 ,  G06K19/077 ,  G06K7/10 ,  H01Q1/22 ,  H04W4/35 ,  G06K19/067

Abstract: A product tagging system is provided that includes at least one RF backscatter transmitter configured to emit a Radio Frequency (RF) signal on a frequency. The system includes a plurality of passive RF backscatter tags, each associated with a respective product and configured to backscatter a reply in response to a transmission from the transmitter. The system includes at least one RF backscatter receiver configured to read data for the respective product by detecting a distributed ambient backscatter signal generated by backscattering the RF signal by a corresponding one of the tags. The at least one RF backscatter receiver includes at least two antennas for performing Simultaneous Multi-Port reception (SMP) by receiving respective distributed ambient backscatter signals from a same one of the tags responsive to a same one of the RF signal being transmitted thereto. Each of the transmitter and receiver include a respective synchronized clock for the SMP.

公开(公告)号：US20200334655A1

公开(公告)日：2020-10-22

申请号：US16849691

申请日：2020-04-15

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour ,  Mustafa Arslan ,  Sampath Rangarajan

IPC: G06Q20/20 ,  G06K7/10

Abstract: A walk-through gate is provided. The walk-through gate includes at least a first semi-transparent side wall and a second semi-transparent side wall encapsulating a walk-through gate volume having an ingress portion and an egress portion. The walk-through gate further includes a plurality of antennas for wirelessly receiving product identifiers for wireless checkout. At least one of the plurality of antennas is made of a semi-transparent conductive material.

公开(公告)号：US20200334424A1

公开(公告)日：2020-10-22

申请号：US16848235

申请日：2020-04-14

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour

IPC: G06K7/10 ,  H04W4/35 ,  G06K19/067

Abstract: A product tagging system is provided that includes at least one RF backscatter transmitter configured to emit a Radio Frequency (RF) signal on a frequency. The system includes a plurality of passive RF backscatter tags, each associated with a respective product and configured to backscatter a reply in response to a transmission from the transmitter. The system includes at least one RF backscatter receiver configured to read data for the respective product by detecting a distributed ambient backscatter signal generated by backscattering the RF signal by a corresponding one of the tags. The at least one RF backscatter receiver includes at least two antennas for performing Simultaneous Multi-Port reception (SMP) by receiving respective distributed ambient backscatter signals from a same one of the tags responsive to a same one of the RF signal being transmitted thereto. Each of the transmitter and receiver include a respective synchronized clock for the SMP.

公开(公告)号：US20200293729A1

公开(公告)日：2020-09-17

申请号：US16817115

申请日：2020-03-12

Applicant: NEC Laboratories America, Inc.

Inventor： Mustafa Arslan ,  Mohammad Khojastepour ,  Shasha Li ,  Sampath Rangarajan

IPC: G06K7/10 ,  G06N3/04

Abstract: Systems and methods for determining radio-frequency identification (RFID) tag proximity groups are provided. The method includes receiving RFID tag readings from multiple RFID tags. The method includes determining signal strengths of the RFID tag readings. The method includes determining pairs of RFID tags based on the RFID tag readings. The method also includes implementing a twin recurrent neural network (RNN) to determine proximity groups of RFID tags based on distance similarity over time between each of the pairs of the RFID tags.

公开(公告)号：US20200265660A1

公开(公告)日：2020-08-20

申请号：US16689663

申请日：2019-11-20

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour ,  Mustafa Arslan ,  Sampath Rangarajan

IPC: G07C9/00 ,  G07C9/02 ,  E06B11/08 ,  E06B11/02 ,  G06K7/10 ,  H04W4/80 ,  H01Q1/12

Abstract: A walk-though gate (WTG) is presented. The WTG includes a WTG structure including a first wall and a second wall, the first and second walls defining a walk though pass way between an entrance and exit, at least one sensor located at the entrance and the exit of a cavity defined by the walk though pass way, at least one first antenna facing toward an inside region of the WTG structure, at least one second antenna facing away from the inside region of the WTG structure, an RFID reader connected to the at least one first and second antennas, and a judgement module to judge if an RFID tag is located inside or outside the walk though gate structure.

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

IPC: G06F9/48 ,  G06F9/50

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.

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.

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

IPC: G06F9/46 ,  G06F9/50 ,  H04L29/08

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.

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

IPC: H04W16/14 ,  H04W28/26 ,  H04W74/00 ,  H04W74/08 ,  H04L27/26 ,  H04W84/12 ,  H04W88/10 ,  H04W72/04

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.

公开(公告)号：US10091114B2

公开(公告)日：2018-10-02

申请号：US15057272

申请日：2016-03-01

Applicant: NEC Laboratories America, Inc.

Inventor： Eugene Chai ,  Karthikeyan Sundaresan ,  Mohammad Khojastepour ,  Sampath Rangarajan ,  Krishna Garikipati

IPC: H04W4/00 ,  H04L12/851 ,  H04W28/12 ,  H04L12/801 ,  H04W74/08 ,  H04W80/00 ,  H04L12/26 ,  H04W88/10

Abstract: Methods and systems of asynchronous access and synchronous transmission include transmitting an initial reservation packet using a first protocol to prevent other devices that use the first protocol from transmitting during a reserved duration. A carrier using a second protocol is activated. Information is transmitted using a second protocol during the reserved duration. During a last subframe of the reserved duration, an additional reservation packet is transmitted using the first protocol to extend the reserved duration. The transmission of the additional reservation packet takes place while the carrier using the second protocol is still active.