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公开(公告)号：US09888469B2
公开(公告)日：2018-02-06
申请号：US14661036
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: H04W72/0433 , H04B7/024 , H04B7/0626 , H04B7/063 , H04B7/0632 , H04L5/0007 , H04L5/0032 , H04L5/0035 , H04L5/0073 , H04L5/0096 , H04W72/0426 , H04W72/082
Abstract: In a wireless communications system including a first transmission point and a second transmission point, a wireless communications method implemented in the first transmission point supporting coordinated multi-point transmission and reception (CoMP) is disclosed. The wireless communications method comprises transmitting to the second transmission point one or more CoMP hypothesis sets, and transmitting to the second transmission point a benefit metric corresponding to each CoMP hypothesis set, wherein the benefit metric can be a negative value. Other methods, systems, and apparatuses also are disclosed.
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公开(公告)号：US09813995B2
公开(公告)日：2017-11-07
申请号：US14818447
申请日：2015-08-05
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Karthikeyan Sundaresan , Eugene Chai , Sampath Rangarajan
IPC: H04W52/14 , H04B7/0413 , H04B7/0456 , H04B15/00 , H04L5/16 , H04W72/04 , H04W72/08 , H04B7/04 , H04L5/00 , H04W52/24 , H04B17/345 , H04B7/022 , H04B7/06
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) used in a wireless communications system including a first uplink (UL) client device, a second UL client device, and a first downlink (DL) client device is disclosed. The method comprises: receiving, from the first DL client device, first composite channel matrix M1 comprising a first channel matrix and a second channel matrix, wherein the first DL client device estimates the first channel matrix and the second channel matrix. Other methods, systems, and apparatuses also are disclosed.
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73.发明授权Multi-user multiple input multiple output (MIMO) communication with distributed antenna systems in wireless networks 有权与无线网络中的分布式天线系统的多用户多输入多输出（MIMO）通信公开(公告)号：US09450654B2
公开(公告)日：2016-09-20
申请号：US14333245
申请日：2014-07-16
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Mohammad Khojastepour , Sampath Rangarajan , Jie Xiong
CPC classification number: H04B7/0452 , H04B7/024 , H04B7/0443 , H04B7/0456 , H04B7/0617 , H04B7/0691 , H04L5/006 , H04W64/00
Abstract: A system and a method are provided. The method includes deploying a plurality of antennas of an access point or a base station as a distributed antenna system. The method further includes configuring the distributed antenna system for multi-user wireless transmissions by applying medium access techniques and power-balanced pre-coding at the access point or the base station. The method also includes providing device localization for devices communicating with the distributed antenna system by applying time-difference-of-arrival techniques to antenna pairs from among the plurality of antennas at the access point or the base station.
Abstract translation: 提供了一种系统和方法。 该方法包括将接入点或基站的多个天线部署为分布式天线系统。 该方法还包括通过在接入点或基站处应用媒体接入技术和功率平衡预编码来配置用于多用户无线传输的分布式天线系统。 该方法还包括通过对接入点或基站处的多个天线中的天线对应用时差差技术来向与分布式天线系统通信的设备提供设备定位。
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74.发明申请公开(公告)号：US20150312903A1
公开(公告)日：2015-10-29
申请号：US14661036
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: H04W72/0433 , H04B7/024 , H04B7/0626 , H04B7/063 , H04B7/0632 , H04L5/0007 , H04L5/0032 , H04L5/0035 , H04L5/0073 , H04L5/0096 , H04W72/0426 , H04W72/082
Abstract: In a wireless communications system including a first transmission point and a second transmission point, a wireless communications method implemented in the first transmission point supporting coordinated multi-point transmission and reception (CoMP) is disclosed. The wireless communications method comprises transmitting to the second transmission point one or more CoMP hypothesis sets, and transmitting to the second transmission point a benefit metric corresponding to each CoMP hypothesis set, wherein the benefit metric can be a negative value. Other methods, systems, and apparatuses also are disclosed.
Abstract translation: 在包括第一传输点和第二传输点的无线通信系统中，公开了在支持协调多点传输和接收（CoMP）的第一传输点中实现的无线通信方法。 所述无线通信方法包括向所述第二传输点发送一个或多个CoMP假设集合，并向所述第二传输点发送对应于每个CoMP假设集合的优惠度量，其中所述益处度量可以是负值。 还公开了其它方法，系统和装置。
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75.发明申请DEGREES OF FREEDOM IN MULTICELL WIRELESS SYSTEMS WITH FULL-DUPLEX BASE STATIONS USING INTERFERENCE ALIGNMENT AND METHODS FOR ENABLING FULL-DUPLEX WITH HALF DUPLEX CLIENTS 有权使用干涉对准的全双工基站的MULTICELL无线系统中的自由度和使用半双工客户端启用全双工的方法公开(公告)号：US20150223173A1
公开(公告)日：2015-08-06
申请号：US14560723
申请日：2014-12-04
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: An interference alignment system for communication structures that includes a single cell channel comprising an access point node, and a full bipartite interference channel (FBIC) configuration of a plurality of receiving nodes and a plurality of transmitting nodes. Each receiving node sees an interfering signal from all transmitting nodes. The access point node of the single cell channel provides a single node having downlink channels to all receiving nodes in the FBIC, and all of the uplink channels from the FBIC are to the single access point node to the single cell channel.
Abstract translation: 一种用于通信结构的干扰对准系统，其包括包括接入点节点的单个小区信道以及多个接收节点和多个发射节点的完全二分干扰信道（FBIC）配置。 每个接收节点看到来自所有发射节点的干扰信号。 单个小区信道的接入点节点向FBIC中的所有接收节点提供具有下行链路信道的单个节点，并且来自FBIC的所有上行链路信道都到单个小区信道的单个接入点节点。
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Patent Agency Ranking
76.发明申请Coordinated Multi-Point Transmission and Reception (CoMP) with Non-Ideal Backhaul (NIB) 审中-公开具有非理想回程（NIB）的协调多点传输和接收（CoMP）公开(公告)号：US20150117562A1
公开(公告)日：2015-04-30
申请号：US14527800
申请日：2014-10-30
Applicant: NEC Laboratories America, Inc.
Inventor： Narayan Prasad, I , Mohammad Khojastepour , Mustafa Arslan , Karthikeyan Sundaresan , Sampath Rangarajan
CPC classification number: H04B7/0626 , H04B7/024 , H04L5/0035 , H04L5/0053 , H04L5/0057
Abstract: A wireless communications method implemented in a transmission point (TP) used in a mobile communications system is disclosed. The wireless communications method includes receiving, from another TP, short-term channel state information (short-term CSI), and processing the short-term CSI. Other methods, systems, and apparatuses also are disclosed.
Abstract translation: 公开了一种在移动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接收短期信道状态信息（短期CSI）和处理短期CSI。 还公开了其它方法，系统和装置。
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公开(公告)号：US20150029904A1
公开(公告)日：2015-01-29
申请号：US14334129
申请日：2014-07-17
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Karthikeyan Sundaresan , Sampath Rangarajan
IPC: H04L5/16
CPC classification number: H04L5/16
Abstract: Methods are provided for converting from half-duplex communication to full-duplex communication in a legacy wireless cellular system having a base station. A method includes providing in the base station separate transmit and receive paths for transmit signals and receive signals, respectively. The method further includes converting an uplink frequency band and a downlink frequency band for the base station to a same frequency band. The method also includes applying analog signal cancellation techniques at the base station to isolate a full-duplex wireless reception signal from a full-duplex wireless transmission signal.
Abstract translation: 提供了用于在具有基站的传统无线蜂窝系统中从半双工通信转换为全双工通信的方法。 一种方法包括在基站中分别提供用于发送信号和接收信号的发送和接收路径。 该方法还包括将基站的上行链路频带和下行链路频带转换为相同的频带。 该方法还包括在基站处应用模拟信号消除技术以将全双工无线接收信号与全双工无线传输信号隔离开来。
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78.发明申请MULTI-USER MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) COMMUNICATION WITH DISTRIBUTED ANTENNA SYSTEMS IN WIRELESS NETWORKS 有权在无线网络中分布式天线系统的多用户多输入多输出（MIMO）通信公开(公告)号：US20150023248A1
公开(公告)日：2015-01-22
申请号：US14333245
申请日：2014-07-16
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Mohammad Khojastepour , Sampath Rangarajan , Jie Xiong
CPC classification number: H04B7/0452 , H04B7/024 , H04B7/0443 , H04B7/0456 , H04B7/0617 , H04B7/0691 , H04L5/006 , H04W64/00
Abstract: A system and a method are provided. The method includes deploying a plurality of antennas of an access point or a base station as a distributed antenna system. The method further includes configuring the distributed antenna system for multi-user wireless transmissions by applying medium access techniques and power-balanced pre-coding at the access point or the base station. The method also includes providing device localization for devices communicating with the distributed antenna system by applying time-difference-of-arrival techniques to antenna pairs from among the plurality of antennas at the access point or the base station.
Abstract translation: 提供了一种系统和方法。 该方法包括将接入点或基站的多个天线部署为分布式天线系统。 该方法还包括通过在接入点或基站处应用媒体接入技术和功率平衡预编码来配置用于多用户无线传输的分布式天线系统。 该方法还包括通过对接入点或基站处的多个天线中的天线对应用时差差技术来向与分布式天线系统通信的设备提供设备定位。
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公开(公告)号：US12245258B2
公开(公告)日：2025-03-04
申请号：US17714505
申请日：2022-04-06
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour
IPC: H04W72/54
Abstract: A method for implementing opportunistic user scheduling under long-term and short-term resource fairness constraints is presented. The method includes enabling a base station to communicate with a plurality mobile devices handled by a plurality of users within a single-cell wireless communication network, deriving a feasible region of resource block (RB) fairness vectors by enabling an opportunistic scheduler to select active users from the plurality of users at each RB, implementing an optimal user scheduling strategy to maximize system utility by optimizing, via the opportunistic scheduler, transmit power and user mode selection, wherein the optimal user scheduling strategy includes a threshold-based strategy (TBS) phase and a compensation phase, and employing a short-term resource fair scheduling strategy satisfying user resource demands over a finite window-length.
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公开(公告)号：US12009891B2
公开(公告)日：2024-06-11
申请号：US17948624
申请日：2022-09-20
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Nariman Torkzaban
CPC classification number: H04B7/0617 , H01Q3/2605 , H04B7/0639
Abstract: A method of communicating between a transmitter and a receiver in a wireless communication system is provided. The method includes selecting a beamformer from a beamforming codebook. The method further includes transmitting a signal from antenna elements using the selected beamformer by adjusting a gain and a phase of the signal. The antenna elements correspond to an absolute value and an angle of a respective complex beamforming coefficient from the selected beamformer. The beamformer is a composite beam including a plurality of disjoint beam lobes, and each of the plurality of disjoint beam lobes covers a desired angular interval.
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