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41.发明申请公开(公告)号：US20160037535A1
公开(公告)日：2016-02-04
申请号：US14839614
申请日：2015-08-28
Applicant: NEC Laboratories America, Inc.
Inventor： Narayan Prasad , Vaibhav Singh , Sampath Rangarajan , Mustafa Arslan
IPC: H04W72/04
CPC classification number: H04L1/00 , H04L47/10 , H04W28/02 , H04W28/08 , H04W72/0446
Abstract: A system and method for resource management in a heterogeneous wireless network that is performed via distributed implementation wherein the resources of the mobile communications system are managed on a coarse time-scale and a fine time-scale. The coarse time-scale management comprises a first stage of determining the user association for each of the TPs followed by a second stage of determining activation fractions for all TPs. The determining of the user association is performed by utilizing a GLS procedure having a Greedy Stage and a Local Search Stage. In the Greedy Stage, new user, TP pairs are analyzed and the pair with the greatest improvement in system utility is selected. In the Local Search Stage, potential swaps are analyzed and a pair offering the greatest improvement that exceeds a threshold is selected. The determining of activation fractions for all TPs is performed by utilizing an auxiliary function method.
Abstract translation: 一种异构无线网络中资源管理的系统和方法，其通过分布式实现执行，其中移动通信系统的资源以粗略的时间尺度和精细的时间尺度进行管理。 粗略的时间尺度管理包括确定每个TP的用户关联的第一阶段，随后是确定所有TP的激活分数的第二阶段。 通过利用具有贪婪阶段和本地搜索阶段的GLS过程来执行用户关联的确定。 在贪婪阶段，对新用户TP对进行分析，选择系统效用最大的对。 在本地搜索阶段，分析潜在的交换，并选择一个提供超过阈值的最大改进的对。 通过利用辅助功能方法来确定所有TP的活化分数。
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42.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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43.发明授权Dynamic and configuration based fractional frequency reuse for uneven load distributions 有权基于动态和配置的分数频率复用用于不均匀的负载分布公开(公告)号：US08942712B2
公开(公告)日：2015-01-27
申请号：US13970878
申请日：2013-08-20
Applicant: NEC Laboratories America, Inc.
Inventor： Honghai Zhang , Narayan Prasad , Sampath Rangarajan
CPC classification number: H04W72/0453 , H04B17/0085 , H04B17/0087 , H04B17/345 , H04B17/382 , H04W16/02 , H04W16/10
Abstract: A fractional frequency reuse method for assigning physical resource units of a contiguous frequency band to sectors of cells is disclosed. Each cell includes at least one base station, for transmission of data to users in the sectors The method comprises, for each cell, segmenting the frequency band such that each separate segment includes a first contiguous portion of physical resource units dedicated to all sectors of the cell in vicinities of the center of the cell and a second contiguous portion of physical resource units dedicated for use in only one of the sectors in the cell in an outer area of the cell, assigning each cell with a physical resource unit configuration such that the second contiguous portion of physical resource units of a sector of a given cell partially overlaps with the first contiguous portion of physical resource units in a segment including the second contiguous portion dedicated to the same sector of a cell neighboring the given cell, and transmitting the data to the users in the sectors in accordance with the assigned physical resource unit configurations. Other methods, apparatuses, and systems also are disclosed.
Abstract translation: 公开了一种用于将连续频带的物理资源单元分配给小区扇区的分数频率重用方法。 每个小区包括至少一个基站，用于向扇区中的用户传输数据。该方法包括：对于每个小区，对频带进行分段，使得每个分离的段包括专用于所述扇区的所有扇区的物理资源单元的第一连续部分 小区中心附近的小区以及专用于小区外区域中的小区中只有一个扇区的物理资源单元的第二连续部分，为每个小区分配物理资源单元配置，使得 给定小区的扇区的物理资源单元的第二连续部分部分地与包括专用于与所述给定小区相邻的小区的相同扇区的所述第二连续部分的段中的物理资源单元的第一连续部分重叠，并且发送所述数据 根据分配的物理资源单元配置向扇区中的用户发送。 还公开了其它方法，装置和系统。
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公开(公告)号：US20140362784A1
公开(公告)日：2014-12-11
申请号：US14295422
申请日：2014-06-04
Applicant: NEC Laboratories America, Inc.
Inventor： Guosen Yue , Narayan Prasad , Sampath Rangarajan
CPC classification number: H04B7/0478 , H04B7/0456 , H04B7/0486 , H04B7/0617 , H04B7/0626 , H04B7/063 , H04B7/0639 , H04B7/0658 , H04B7/066 , H04B7/0697 , H04L5/0023 , H04L5/0057
Abstract: A method implemented in a base station used in a wireless communications system is disclosed. The method comprises receiving, from a user equipment, rank indication (RI), a first precoding matrix indicator (PMI), and a second PMI (codebook index i2), wherein values 0-15 are assigned to the second PMI IPMI2 for RI=1 and values 0-3 are assigned to the second PMI IPMI2 for each of RI=2, RI=3, and RI=4, and wherein codebook index i2 comprises IPMI2 for RI=1. 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。 该方法包括从用户设备接收秩指示（RI），第一预编码矩阵指示符（PMI）和第二PMI（码本索引i2），其中值0-15被分配给第二PMI IPMI2用于RI = 1和值0-3被分配给RI = 2，RI = 3和RI = 4中的每一个的第二PMI IPMI2，并且其中码本索引i2包括RI = 1的IPMI2。 还公开了其它方法，装置和系统。
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公开(公告)号：US08897725B2
公开(公告)日：2014-11-25
申请号：US13864355
申请日：2013-04-17
Applicant: NEC Laboratories America, Inc.
Inventor： Narayan Prasad , Kishore Ramachandran , Sampath Rangarajan
CPC classification number: H04B7/0408 , H04B1/1027 , H04B7/063 , H04B7/0695 , H04B7/088
Abstract: A method implemented in a wireless communications system is disclosed. The method includes: transmitting, from a wireless transmitter having a transmit antenna array, a first signal on each of a plurality of different transmit beams in transmitter (TX) sector level sweep (SLS), receiving, at a wireless receiver having a receive antenna array, the first signal, and determining, at the wireless receiver, quality of the first signal. Other methods, systems, and apparatuses also are disclosed.
Abstract translation: 公开了一种在无线通信系统中实现的方法。 该方法包括：在具有发射天线阵列的无线发射机中，在发射机（TX）扇区电平扫描（SLS）中的多个不同发射波束的每一个上发射第一信号，在具有接收天线 阵列，第一信号，以及在无线接收机处确定第一信号的质量。 还公开了其它方法，系统和装置。
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Patent Agency Ranking
公开(公告)号：US20140087783A1
公开(公告)日：2014-03-27
申请号：US14093565
申请日：2013-12-02
Applicant: NEC Laboratories America, Inc.
Inventor： Honghai Zhang , Narayan Prasad , Sampath Rangarajan
IPC: H04W52/14
CPC classification number: H04W52/146 , H04W52/08 , H04W52/10 , H04W52/242 , H04W52/243
Abstract: A method for uplink power control implemented in a wireless communications system including one or more user equipment, a serving base station, and at least one neighboring base station is disclosed. The method comprises measuring, at each user equipment, pathloss, sending, from each user equipment to the serving base station, the pathloss, and determining, at the serving base station, uplink transmit power based on the pathloss. Other methods, systems, and apparatuses also are disclosed.
Abstract translation: 公开了一种在包括一个或多个用户设备，服务基站和至少一个相邻基站的无线通信系统中实现的上行链路功率控制的方法。 该方法包括在每个用户设备处测量路径损耗，从每个用户设备向服务基站发送路径损耗，以及基于路径损耗在服务基站确定上行链路发射功率。 还公开了其它方法，系统和装置。
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公开(公告)号：US20140044061A1
公开(公告)日：2014-02-13
申请号：US13948409
申请日：2013-07-23
Applicant: NEC Laboratories America, Inc.
Inventor： Guosen Yue , Narayan Prasad , Meilong Jiang , Sampath Rangarajan
IPC: H04W72/04
CPC classification number: H04J11/0053 , H04B7/024 , H04B7/0456 , H04B7/063 , H04B7/0632 , H04L1/0026 , H04L1/0068 , H04L1/0077 , H04L5/0035 , H04L5/0044 , H04L5/0048 , H04L5/005 , H04L5/0053 , H04L5/0057 , H04L5/0073 , H04L5/0091 , H04W24/10 , H04W72/042
Abstract: A communications method implemented in a transmission point (TP) used in a coordinated multipoint transmission and reception (CoMP) system is disclosed. The communications method comprises transmitting, to a user equipment (UE), attributers for up to four indicators indicating at least physical downlink shared channel (PDSCH) resource element (RE) mapping, and transmitting, to the UE, one of the four indicators, each of which is conveyed in 2 bits, wherein the four indicators comprises ‘00’, ‘01’, ‘10’, and ‘11’ corresponding to a first set, a second set, a third set, and a fourth set of parameters, respectively. Other methods, apparatuses, and systems are also disclosed.
Abstract translation: 公开了在协调多点发送和接收（CoMP）系统中使用的传输点（TP）中实现的通信方法。 所述通信方法包括：向用户设备（UE）发送最多指示至少物理下行链路共享信道（PDSCH）资源元素（RE）映射的四个指示符的属性，并向所述UE发送所述四个指示符之一， 其中每一个以2位传送，其中四个指示符包括对应于第一组，第二组，第三组和第四组参数的“00”，“01”，“10”和“11” ， 分别。 还公开了其它方法，装置和系统。
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48.发明授权公开(公告)号：US08520763B2
公开(公告)日：2013-08-27
申请号：US13650477
申请日：2012-10-12
Applicant: NEC Laboratories America, Inc.
Inventor： Ali Tajer , Narayan Prasad , Xiaodong Wang , Sampath Rangarajan
CPC classification number: H04B7/0626 , H04B7/022
Abstract: Methods and systems for optimizing the utilities of receiver devices in a wireless communication network are disclosed. Precoder design formulations that maximize a minimum worst-case rate or a worst-case sum rate are described for both full base station cooperation and limited base station cooperation scenarios. In addition, optimal equalizers are also selected to optimize the worst-case sum rate.
Abstract translation: 公开了用于优化无线通信网络中的接收机设备的实用性的方法和系统。 对于完整的基站合作和有限的基站合作情况，都会描述使最小最坏情况速率或最差情况下的总速率最大化的预编码器设计公式。 此外，还选择最佳均衡器来优化最差情况下的和速率。
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49.发明申请公开(公告)号：US20130034176A1
公开(公告)日：2013-02-07
申请号：US13650477
申请日：2012-10-12
Applicant: NEC Laboratories America, Inc.
Inventor： Ali Tajer , Narayan Prasad , Xiaodong Wang , Sampath Rangarajan
IPC: H04W4/00
CPC classification number: H04B7/0626 , H04B7/022
Abstract: Methods and systems for optimizing the utilities of receiver devices in a wireless communication network are disclosed. Precoder design formulations that maximize a minimum worst-case rate or a worst-case sum rate are described for both full base station cooperation and limited base station cooperation scenarios. In addition, optimal equalizers are also selected to optimize the worst-case sum rate.
Abstract translation: 公开了用于优化无线通信网络中的接收机设备的实用性的方法和系统。 对于完整的基站合作和有限的基站合作情况，都会描述使最小最坏情况速率或最差情况下的总速率最大化的预编码器设计公式。 此外，还选择最佳均衡器来优化最差情况下的和速率。
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公开(公告)号：US10291370B2
公开(公告)日：2019-05-14
申请号：US15867074
申请日：2018-01-10
Applicant: NEC Laboratories America, Inc.
Inventor： Narayan Prasad , Mohammad Khojastepour , Sampath Rangarajan
Abstract: Methods and systems for assigning users to nodes include assigning user devices to respective macro nodes in a wireless network. Each of the user devices is assigned to a respective pico node in the wireless network. Each respective pico node is associated with the same macro node that the respective user device is assigned to. Resource allocation fractions are assigned to all pico nodes and all macro nodes in the wireless network based on the assignment of each of the plurality of user devices respective macro nodes and pico nodes.
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