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公开(公告)号：US20140140428A1
公开(公告)日：2014-05-22
申请号：US14082695
申请日：2013-11-18
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad A. Khojastepour , Sampath Rangarajan
CPC classification number: H04L25/03955 , H04B7/0417 , H04B7/0639 , H04L25/03898
Abstract: There is provided a method performed by a transmitter in a multi-user communication system. The method includes transmitting a first part of a codeword to a plurality of receivers over a communication channel in a transmission. The method further includes receiving feedback on the transmission of the first part of the codeword. The method also includes providing an artificial channel having channel parameters adjustable responsive to the received feedback. The method additionally includes virtually feeding the artificial channel with the first part of the codeword to generate artificial channel output data. The method further includes encoding a second part of the codeword for transmission to the plurality of receivers over the communication channel responsive to the artificial channel output data. The method also includes transmitting the encoded signals to the plurality of receivers over the communication channel.
Abstract translation: 提供了一种由多用户通信系统中的发射机执行的方法。 该方法包括通过传输中的通信信道将码字的第一部分发送到多个接收机。 该方法还包括接收关于码字的第一部分的传输的反馈。 该方法还包括提供具有响应于所接收的反馈可调节的信道参数的人造通道。 该方法还包括虚拟地将人造通道与码字的第一部分进行馈送以产生人造通道输出数据。 该方法还包括响应于人造渠道输出数据，通过通信通道对码字的第二部分进行编码以传输到多个接收机。 该方法还包括通过通信信道将编码信号发送到多个接收机。
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公开(公告)号：US08874125B2
公开(公告)日：2014-10-28
申请号：US13787985
申请日：2013-03-07
Applicant: NEC Laboratories America, Inc.
Inventor： Rajesh Mahindra , Mohammad A. Khojastepour , Sampath Rangarajan , Honghai Zhang
Abstract: A method implemented in an apparatus used in a radio access network (RAN) sharing system including a plurality of basestations is disclosed. The method includes estimating resource requirement or demand of one or more entities in each base station according to feedback from the plurality of basestations, computing resource allocation for said one or more entities, and enforcing the computed resource allocation using basestation-level virtualization. Other methods, apparatuses, and systems also are disclosed.
Abstract translation: 公开了一种在包括多个基站的无线电接入网络（RAN）共享系统中使用的装置中实现的方法。 该方法包括根据来自多个基站的反馈估计每个基站中的一个或多个实体的资源需求或需求，计算所述一个或多个实体的资源分配，以及使用基站级虚拟化来执行所计算的资源分配。 还公开了其它方法，装置和系统。
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公开(公告)号：US08767665B2
公开(公告)日：2014-07-01
申请号：US13967582
申请日：2013-08-15
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad A. Khojastepour , Narayan Prasad , Sampath Rangarajan
CPC classification number: H04B7/0452 , H04B7/0632 , H04B7/0639 , H04B7/0665 , H04L5/0023 , H04L5/0094
Abstract: A method implemented in a base station used in a wireless communications system is disclosed. The method comprises transmitting an index indicating data stream parameters, and transmitting an indication of the number of transmit antennas at the base station, wherein the data stream parameters for 8 transmit antennas are indicated by the index according to a first table, and wherein the data stream parameters for 4 transmit antennas are indicated by the index according to a second table. Other methods, apparatuses, and systems also are disclosed.
Abstract translation: 公开了一种在无线通信系统中使用的基站中实现的方法。 该方法包括发送指示数据流参数的索引，以及发送在基站处的发射天线数量的指示，其中根据第一表由索引指示8个发射天线的数据流参数，并且其中数据 4个发射天线的流参数由第二个表的索引表示。 还公开了其它方法，装置和系统。
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公开(公告)号：US09124319B2
公开(公告)日：2015-09-01
申请号：US14258378
申请日：2014-04-22
Applicant: NEC Laboratories America, Inc.
Inventor： Narayan Prasad , Guosen Yue , Mohammad A. Khojastepour , Meilong Jiang , Sampath Rangarajan
CPC classification number: H04B7/0452 , H04J11/0046 , H04L5/0023 , H04L25/03331 , H04L27/0008 , H04L27/0012 , H04L27/34 , H04W72/042 , H04W72/12
Abstract: A method implemented in a user equipment used in a multi-user multiple input multiple output (MU-MIMO) wireless communications system is disclosed. The method includes receiving from a base station an indication of a first modulation type for the user equipment, receiving a first data signal for the user equipment, receiving a second data signal for a co-scheduled user equipment, where a second modulation type for the co-scheduled user equipment is unknown to the user equipment, and deciding the second modulation type. Other methods, systems, and apparatuses also are disclosed.
Abstract translation: 公开了一种在多用户多输入多输出（MU-MIMO）无线通信系统中使用的用户设备中实现的方法。 该方法包括从基站接收用户设备的第一调制类型的指示，接收用户设备的第一数据信号，为共同调度的用户设备接收第二数据信号，其中第二调制类型为 共同调度的用户设备对于用户设备是未知的，并且确定第二调制类型。 还公开了其它方法，系统和装置。
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公开(公告)号：US08923907B2
公开(公告)日：2014-12-30
申请号：US13755485
申请日：2013-01-31
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad A. Khojastepour , Xinyu Zhang , Karthikeyan Sundaresan , Sampath Rangarajan
IPC: H04W68/00 , H04W4/00 , H04W74/00 , H04W72/08 , H04L1/00 , H04L1/06 , H04B7/02 , H04W74/08 , H04B7/04
CPC classification number: H04W74/00 , H04B7/024 , H04B7/0452 , H04L1/0015 , H04L1/0026 , H04L1/06 , H04W72/082 , H04W74/08
Abstract: Systems and methods for system for channel access adaptation are disclosed. One system includes a plurality of remote antennas and a plurality of access points. The remote antennas transmit data to receivers and obtain channel state information. Additionally, each access point controls a different cluster of the remote antennas and receives the respective channel state information from the remote antennas of the cluster. Further, each access point is configured to, independently from other access points, adapt channel allocations to the remote antennas of the respective cluster based on a tracking of sums of collision loss probabilities. Each given sum is determined by the access point for a different given set of a plurality of sets of cooperating remote antennas in the respective cluster, where each constituent collision loss probability in the given sum is determined by the access point from a different interference clique to which the given set belongs.
Abstract translation: 公开了用于信道接入适配的系统和方法。 一个系统包括多个远程天线和多个接入点。 远程天线向接收机发送数据并获取信道状态信息。 此外，每个接入点控制远程天线的不同簇，并从群集的远程天线接收相应的信道状态信息。 此外，每个接入点被配置为独立于其他接入点，基于对碰撞丢失概率的和的跟踪来将信道分配调整到相应群集的远程天线。 每个给定的和由相应集群中的多组协作远程天线的不同给定集合的接入点确定，其中给定和中的每个组成冲突丢失概率由接入点由不同的干扰集团确定 给定集合属于哪个。
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Patent Agency Ranking
公开(公告)号：US20140023005A1
公开(公告)日：2014-01-23
申请号：US13946499
申请日：2013-07-19
Applicant: NEC Laboratories America, Inc.
Inventor： Karthikeyan Sundaresan , Mohammad A. Khojastepour , Sampath Rangarajan
IPC: H04W72/04
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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公开(公告)号：US20130237265A1
公开(公告)日：2013-09-12
申请号：US13755485
申请日：2013-01-31
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： Mohammad A. Khojastepour , Xinyu Zhang , Karthikeyan Sundaresan , Sampath Rangarajan
IPC: H04W74/00
CPC classification number: H04W74/00 , H04B7/024 , H04B7/0452 , H04L1/0015 , H04L1/0026 , H04L1/06 , H04W72/082 , H04W74/08
Abstract: Systems and methods for system for channel access adaptation are disclosed. One system includes a plurality of remote antennas and a plurality of access points. The remote antennas transmit data to receivers and obtain channel state information. Additionally, each access point controls a different cluster of the remote antennas and receives the respective channel state information from the remote antennas of the cluster. Further, each access point is configured to, independently from other access points, adapt channel allocations to the remote antennas of the respective cluster based on a tracking of sums of collision loss probabilities. Each given sum is determined by the access point for a different given set of a plurality of sets of cooperating remote antennas in the respective cluster, where each constituent collision loss probability in the given sum is determined by the access point from a different interference clique to which the given set belongs.
Abstract translation: 公开了用于信道接入适配的系统和方法。 一个系统包括多个远程天线和多个接入点。 远程天线向接收机发送数据并获取信道状态信息。 此外，每个接入点控制远程天线的不同簇，并从群集的远程天线接收相应的信道状态信息。 此外，每个接入点被配置为独立于其他接入点，基于对碰撞丢失概率的和的跟踪来将信道分配调整到相应群集的远程天线。 每个给定的和由相应集群中的多组协作远程天线的不同给定集合的接入点确定，其中给定和中的每个组成冲突丢失概率由接入点由不同的干扰集团确定 给定集合属于哪个。
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公开(公告)号：US20130170533A1
公开(公告)日：2013-07-04
申请号：US13629034
申请日：2012-09-27
Applicant: Nec Laboratories America, Inc.
Inventor： Mohammad A. Khojastepour , Xinyu Zhang , Karthikeyan Sundaresan , Sampath Rangarajan
IPC: H04B7/04
CPC classification number: H04B7/0456 , H04B7/024
Abstract: In a multiple-input multiple-output (MIMO) wireless system supporting Coordinated Multi-Point (CoMP) transmission and having a first base station, a second base station, and a user equipment, a communications method implemented in the first base station is disclosed. In an aspect, the communications method includes exchanging, with the second base station through local information exchange, first information about a first channel between the first base station and the user equipment and second information about a second channel between the second base station and the user equipment, and computing at least one of a precoding matrix, a receiver filter, and a projection matrix, wherein the user equipment estimates the first information and the second information, and shares the first information and the second information with the first base station. Other apparatuses and some methods for wireless communications also are disclosed.
Abstract translation: 在支持协调多点（CoMP）传输并具有第一基站，第二基站和用户设备的多输入多输出（MIMO）无线系统中，公开了在第一基站中实现的通信方法 。 一方面，通信方法包括通过本地信息交换与第二基站交换关于第一基站和用户设备之间的第一信道的第一信息和关于第二基站与用户之间的第二信道的第二信息 设备，以及计算预编码矩阵，接收机过滤器和投影矩阵中的至少一个，其中用户设备估计第一信息和第二信息，并与第一基站共享第一信息和第二信息。 还公开了用于无线通信的其它装置和一些方法。
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公开(公告)号：US20150288434A1
公开(公告)日：2015-10-08
申请号：US14744496
申请日：2015-06-19
Applicant: NEC Laboratories America, Inc.
Inventor： Narayan Prasad , Guosen Yue , Mohammad A. Khojastepour , Meilong Jiang , Sampath Rangarajan
CPC classification number: H04B7/0452 , H04J11/0046 , H04L5/0023 , H04L25/03331 , H04L27/0008 , H04L27/0012 , H04L27/34 , H04W72/042 , H04W72/12
Abstract: A method implemented in a user equipment used in a wireless communications system is disclosed. The method comprises receiving from a base station an indication of a first modulation type for the user equipment, receiving from the base station a first data signal for the user equipment, receiving from the base station an indication of a minimum time-frequency unit that is assigned to another user equipment, receiving a second data signal for said another user equipment, where a second modulation type for said another user equipment is unknown to the user equipment, and cancelling and suppressing interference by using the minimum time-frequency unit. 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用户设备中实现的方法。 该方法包括从基站接收用户设备的第一调制类型的指示，从基站接收用户设备的第一数据信号，从基站接收最小时间频率单元的指示，该最小时间频率单位是 分配给另一用户设备，接收用于所述另一用户设备的第二数据信号，其中所述另一用户设备的第二调制类型对于用户设备是未知的，并且通过使用最小时间频率单元来消除和抑制干扰。 还公开了其它方法，系统和装置。
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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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