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公开(公告)号：US10852414B2
公开(公告)日：2020-12-01
申请号：US16582314
申请日：2019-09-25
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Eugene Chai , Sampath Rangarajan
Abstract: An in-home inventory 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 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 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 hosting the at least one RF backscatter transmitter and the other device hosting the at least one RF backscatter receiver is configured to maintain an inventory and location of the products in the given area.
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公开(公告)号：US20180270849A1
公开(公告)日：2018-09-20
申请号：US15915491
申请日：2018-03-08
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Eugene Chai , Mohammad Khojastepour , Sampath Rangarajan
Abstract: A system is provided for speculative scheduling that includes a base station having a processor. The processor computes an overall schedule for a set of clients. The overall schedule is formed from a set of speculative schedules, is configured to maximize unlicensed spectrum usage, and is computed by (a) determining a speculative schedule for each resource block from a set of resource blocks in a given sub-frame based on statistics determined for the clients individually and jointly, and (b) selecting, for formation into the overall schedule, (i) a particular resource block and (ii) the speculative schedule for the particular resource block, that yield the maximum incremental utility relative to already determined speculative schedules for other resource blocks in the set, based on criteria including uplink access statistics. The processor executes the overall schedule responsive to a completion of the speculative schedule determination for each resource block in the given sub-frame.
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公开(公告)号：US09936414B2
公开(公告)日：2018-04-03
申请号：US15270864
申请日：2016-09-20
Applicant: NEC Laboratories America, Inc.
Inventor： Eugene Chai , Mohammad Khojastepour , Sampath Rangarajan , Karthikeyan Sundaresan , Krishna Garikipati
IPC: H04W24/10 , H04W48/18 , H04W72/04 , H04W72/08 , H04W16/14 , H04W74/08 , H04W84/04 , H04W84/12 , H04W72/12
CPC classification number: H04W24/10 , H04W16/14 , H04W48/18 , H04W72/0446 , H04W72/082 , H04W72/1215 , H04W74/0816 , H04W84/042 , H04W84/12 , H04W88/10
Abstract: Systems and methods for improving Long Term Evolution (LTE)-WiFi coexistence in a network, including configuring one or more LTE nodes for asynchronous access and synchronous transmission to bridge LTE and WiFi access modes. A channel is reserved for LTE transmission in the one or more LTE nodes, and a supplementary WiFi module is provided in the one or more LTE nodes for sensing the channel for occupancy and for broadcasting a reservation signal on the channel prior to the LTE transmission. Contention window sizes are scaled linearly by increasing the contention window sizes proportionally to a subframe collision rate to maintain throughput fairness to the WiFi, and synchronous transmission from the one or more LTE nodes to one or more User Devices (UEs) is performed by activating the unlicensed carrier for a reserved time period.
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公开(公告)号：US09722720B2
公开(公告)日：2017-08-01
申请号：US14811268
申请日：2015-07-28
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Karthikeyan Sundaresan , Sampath Rangarajan
CPC classification number: H04J11/005 , H04B7/024
Abstract: A method, system, and computer program product for minimizing intra-cell and inter-cell interference in a multi-cell full duplex communication system in a wireless network. The method includes selecting, by a client selector, a plurality of clients, wherein the plurality of clients includes a plurality of uplink clients configured to transmit signals and a plurality of downlink clients configured to receive signals over a plurality of data streams in each cell of the multi-cell full duplex communication system, and performing, by a spatial interference aligner, spatial interference alignment on interfering data streams to align the interfering data streams of uplink clients towards downlink clients in its own cell and downlink clients in a neighboring cell.
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公开(公告)号：US20170161109A1
公开(公告)日：2017-06-08
申请号：US15362439
申请日：2016-11-28
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Rajesh Mahindra , Sampath Rangarajan , Karthikeyan Sundaresan
CPC classification number: G06F9/505 , G06F9/5061 , H04L67/10 , H04L67/1031
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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Patent Agency Ranking
6.发明申请SCALING WIRELESS FULL DUPLEX IN MULTI-CELL NETWORKS WITH SPATIAL INTERFERENCE ALIGNMENT 有权在具有空间干扰对齐的多个细胞网络中对无线全双工进行分级公开(公告)号：US20160036504A1
公开(公告)日：2016-02-04
申请号：US14811268
申请日：2015-07-28
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Karthikeyan Sundaresan , Sampath Rangarajan
CPC classification number: H04J11/005 , H04B7/024
Abstract: A method, system, and computer program product for minimizing intra-cell and inter-cell interference in a multi-cell full duplex communication system in a wireless network. The method includes selecting, by a clint selector, a plurality of clients, wherein the plurality of clients includes a plurality of uplink clients configured to transmit signals and a plurality of downlink clients configured to receive signals over a plurality of data streams in each cell of the multi-cell full duplex communication system, and performing, by a spatial interference aligner, spatial interference alignment on interfering data streams to align the interfering data streams of uplink clients towards downlink clients in its own cell and downlink clients in a neighboring cell.
Abstract translation: 一种用于最小化无线网络中的多小区全双工通信系统中的小区内和小区间干扰的方法，系统和计算机程序产品。 该方法包括通过选择器选择多个客户端，其中多个客户端包括被配置为发送信号的多个上行链路客户端和被配置成通过多个数据流中的每个小区中的多个数据流接收信号的多个下行链路客户端 多小区全双工通信系统，并且通过空间干扰对准器执行干扰数据流上的空间干扰对准，以将上行链路客户端的干扰数据流对准相邻小区中其自己的小区和下行链路客户端中的下行链路客户端。
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公开(公告)号：US20150381248A1
公开(公告)日：2015-12-31
申请号：US14818451
申请日：2015-08-05
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Karthikeyan Sundaresan , Eugene Chai , Sampath Rangarajan
CPC classification number: H04W52/14 , H04B7/022 , H04B7/0413 , H04B7/0421 , H04B7/0456 , H04B7/0619 , H04B15/00 , H04B17/345 , H04L5/0048 , H04L5/16 , H04W52/241 , H04W72/0406 , H04W72/082
Abstract: A method implemented in an access point (AP) having N antennas used in a wireless communications system including two first client devices each of which has M antennas and two second client devices each of which has N antennas, where M and N are even is disclosed. The method comprises: performing interference alignment (IA) in common vector spaces; and delivering M+N streams. Other methods, systems, and apparatuses also are disclosed.
Abstract translation: 公开了一种在具有N个天线的接入点（AP）中实现的方法，该无线通信系统包括具有M个天线的两个第一客户端设备和每个具有N个天线的两个第二客户端设备，其中M和N是偶数的无线通信系统 。 该方法包括：在公共矢量空间中执行干涉对准（IA）; 并提供M + N个流。 还公开了其它方法，系统和装置。
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8.发明申请公开(公告)号：US20150312893A1
公开(公告)日：2015-10-29
申请号：US14661236
申请日：2015-03-18
Applicant: NEC Laboratories America, Inc.
Inventor： Narayan Prasad , Mohammad Khojastepour , Mustafa Arslan , Karthikeyan Sundaresan , Sampath Rangarajan
CPC classification number: H04W72/0406 , H04B7/024 , H04B7/0417 , H04B7/0626 , H04B17/318 , H04L5/0053
Abstract: A wireless communications method implemented in a transmission point (TP) used in a wireless communications system is disclosed. The wireless communications method comprises receiving, from another TP, channel state information (CSI) for a user equipment (UE), and receiving, from said another TP, user identification for the user equipment, wherein the signaling of the CSI for the user equipment enables user identification for the user equipment. Other methods, systems, and apparatuses also are disclosed.
Abstract translation: 公开了一种在无线通信系统中使用的传输点（TP）中实现的无线通信方法。 无线通信方法包括从另一个TP接收用于用户设备（UE）的信道状态信息（CSI），以及从所述另一个TP接收用户设备的用户标识，其中用于所述用户设备的CSI的信令 使用户能够识别用户设备。 还公开了其它方法，系统和装置。
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公开(公告)号：US09125047B2
公开(公告)日：2015-09-01
申请号：US13951396
申请日：2013-07-25
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Cheng Liu , Mustafa Arslan , Meilong Jiang , Sampath Rangarajan
CPC classification number: H04W16/02 , H04W16/32 , H04W24/02 , H04W84/042 , H04W88/085
Abstract: A wireless communications system is disclosed. The system comprises a baseband processing unit (BBU) pool including one or more baseband processing units (BBUs), and a plurality of remote radio heads (RRHs) connected to the BBU pool through a front-haul network, wherein the wireless communications system has a plurality of sectors, each of which includes one or more small cells, each of which is deployed by one of the plurality of RRHs, wherein a BBUs is mapped to two or more RRHs in a sector in a one-to-many configuration, and a BBU is mapped to a single RRH in a sector in a one-to-one configuration, and wherein a combination of the one-to-one configuration and the one-to-many configuration is applied to each sector. Other systems, apparatuses, and methods also are disclosed.
Abstract translation: 公开了一种无线通信系统。 该系统包括一个包括一个或多个基带处理单元（BBU）的基带处理单元（BBU）池以及通过前端网络连接到BBU池的多个远程无线电头（RRH），其中该无线通信系统具有 多个扇区，每个扇区包括一个或多个小小区，每个小小区由多个RRH中的一个部署，其中BBU被映射到一对多配置中扇区中的两个或更多个RRH， 并且BBU以一对一配置映射到扇区中的单个RRH，并且其中将一对一配置和一对多配置的组合应用于每个扇区。 还公开了其它系统，装置和方法。
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公开(公告)号：US09066351B2
公开(公告)日：2015-06-23
申请号：US13946499
申请日：2013-07-19
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Mohammad A. Khojastepour , Sampath Rangarajan
CPC classification number: H04W72/048 , H04W4/00 , H04W4/50
Abstract: Systems and methods for data transmission include categorizing users into one of a plurality of profiles using a processor based on device and channel characteristics. Each of the plurality of profiles is mapped to one of a plurality of transmission schemes. Data is combined for a plurality of users categorized with different profiles for data transmission.
Abstract translation: 用于数据传输的系统和方法包括使用基于设备和信道特性的处理器将用户分类为多个简档之一。 多个简档中的每个被映射到多个传输方案中的一个。 数据被组合用于被分类用于数据传输的不同简档的多个用户。
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