公开(公告)号：US08874126B2

公开(公告)日：2014-10-28

申请号：US13415730

申请日：2012-03-08

Applicant: Su-Ryong Jeong ,  Sung-Eun Park ,  Hyun-Kyu Yu ,  Chi-Woo Lim ,  Shuangfeng Han

Inventor： Su-Ryong Jeong ,  Sung-Eun Park ,  Hyun-Kyu Yu ,  Chi-Woo Lim ,  Shuangfeng Han

IPC: H04W72/00 ,  H04W48/12 ,  H04W48/20 ,  H04W72/08 ,  H04W72/04

CPC classification number: H04W48/12 ,  H04W48/20 ,  H04W72/042 ,  H04W72/082

Abstract: An apparatus and method for initial ranging in a wireless communication system including a heterogeneous network. An operation of a terminal includes selecting a serving cell considering a biased value of a base station applying range expansion. The operation also includes receiving ranging code classification information and threshold information associated with the serving cell. The operation further includes, if a channel quality with the serving cell is less than the threshold, selecting one a plurality of poor-expected-ranging codes indicated by the ranging code classification information, and performing initial ranging using the selected poor-expected-ranging code.

Abstract translation: 一种用于包括异构网络的无线通信系统中的初始测距的装置和方法。 终端的操作包括考虑基站施加范围扩展的偏置值来选择服务小区。 该操作还包括接收测距码分类信息和与服务小区相关联的阈值信息。 该操作还包括：如果与服务小区的信道质量小于阈值，则选择由测距码分类信息指示的多个不良预期测距码中的一个，并且使用所选择的预期不合格范围进行初始测距 码。

公开(公告)号：US08626071B2

公开(公告)日：2014-01-07

申请号：US13358386

申请日：2012-01-25

Applicant: Shuangfeng Han ,  Chi-Woo Lim

Inventor： Shuangfeng Han ,  Chi-Woo Lim

IPC: H04B1/00

CPC classification number: H04W72/082 ,  H04B7/0639 ,  H04W16/28 ,  H04W28/04 ,  H04W52/244 ,  H04W72/0413 ,  H04W72/0453 ,  H04W84/045

Abstract: A method and apparatus provide interference mitigation in a heterogeneous network using beamforming. In the method, a macro Mobile Station (MS) receives a broadcast message including a Precoding Matrix Index (PMI) set restricted in a macro cell, measures a Signal-to-Interference plus Noise Ratio (SINR) and a channel power from an adjacent femto Base Station (BS) and calculates a PMI, determines whether to request a dedicated frequency resource for a macro MS on the basis of the measured SINR, the channel power from the adjacent femto BS, and the calculated PMI, and requests the dedicated frequency resource for the macro MS from a macro BS.

Abstract translation: 一种方法和装置使用波束形成在异构网络中提供干扰减轻。 在该方法中，宏移动站（MS）接收包括在宏小区中限制的集合的预编码矩阵索引（PMI）的广播消息，测量来自相邻的信元干扰加噪声比（SINR）和信道功率 毫微微基站（BS）并且计算PMI，基于测量的SINR，来自相邻毫微微BS的信道功率和所计算的PMI，确定是否请求用于宏MS的专用频率资源，并请求专用频率 来自宏BS的宏MS的资源。

公开(公告)号：US08615198B2

公开(公告)日：2013-12-24

申请号：US12807117

申请日：2010-08-27

Applicant: Shuangfeng Han ,  David Mazzarese ,  Sang-Woo Lee

Inventor： Shuangfeng Han ,  David Mazzarese ,  Sang-Woo Lee

IPC: H04B1/00

CPC classification number: H04B7/024 ,  H04B7/0619 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/0643 ,  H04B17/345

Abstract: A method for triggering multicell MIMO schemes in a multiple antenna system includes transmitting, at a Mobile Station (MS), a first feedback information for single-cell closed-loop MIMO to a Base Station (BS); requesting, at the BS, Normalized Interference Power (NIP) feedback from the MS based on the first feedback information; feeding, at the MS, the NIP back to the BS; selecting, at the BS, a first NIP threshold and a second NIP threshold based on the NIP fed back from the MS; and requesting, at the MS, one of a first MIMO scheme and a second MIMO scheme by comparing the calculated first and second NIPs with the first NIP threshold and the second NIP threshold.

Abstract translation: 一种用于在多天线系统中触发多单元MIMO方案的方法包括在移动站（MS）向基站（BS）发送用于单小区闭环MIMO的第一反馈信息; 基于第一反馈信息，从BS请求从MS获得的归一化干扰功率（NIP）反馈; 在MS上将NIP送回BS; 基于从MS反馈的NIP，在BS处选择第一NIP阈值和第二NIP阈值; 以及通过将计算的第一和第二NIP与第一NIP阈值和第二NIP阈值进行比较，在MS处请求第一MIMO方案和第二MIMO方案之一。

公开(公告)号：US08605800B2

公开(公告)日：2013-12-10

申请号：US13196295

申请日：2011-08-02

Applicant: Shuangfeng Han

Inventor： Shuangfeng Han

IPC: H04L27/00

CPC classification number: H04W48/14 ,  H04B7/024 ,  H04B7/0417 ,  H04B7/0639

Abstract: An apparatus and a method for operating a Mobile Station (MS) in a wireless communication system are provided. The method includes receiving a threshold for a gap of an average Receive (Rx) power between a neighboring Base Station (BS) and a serving BS, transmitting to the serving BS, identification information of a BS having the average power greater than a first value, receiving information of a BS involving joint processing generated using information of the BS having the average power greater than the first value, feeding Precoding Matrix Index (PMI) information of the BS involving the joint processing, back to the serving BS, receiving information indicating a PMI operation mode of the MS, from the serving BS, and determining a PMI operation mode according to the information indicating the PMI operation mode of the MS.

Abstract translation: 提供了一种在无线通信系统中操作移动台（MS）的装置和方法。 该方法包括：接收相邻基站（BS）和服务BS之间的平均接收（Rx）功率的间隙的阈值，向服务BS发送平均功率大于第一值的BS的识别信息 接收涉及使用平均功率大于第一值的BS的信息产生的联合处理的BS的信息，将涉及联合处理的BS的预编码矩阵索引（PMI）信息提供给服务BS，接收信息指示 来自服务BS的MS的PMI操作模式，以及根据指示MS的PMI操作模式的信息来确定PMI操作模式。

公开(公告)号：US20130051485A1

公开(公告)日：2013-02-28

申请号：US13594370

申请日：2012-08-24

Applicant: Rakesh TAORI ,  Shuangfeng Han

Inventor： Rakesh TAORI ,  Shuangfeng Han

IPC: H04J11/00

CPC classification number: H04L27/2634 ,  H04L27/2601 ,  H04L27/2626 ,  H04L27/2646 ,  H04W72/04

Abstract: A communication apparatus and method in a wireless communication system that support multiple Orthogonal Frequency Division Multiplexing (OFDM) parameter sets. A method includes determining a respective OFDM parameter set for each of multiple Radio Frequency (RF) chains; and processing an OFDM signal in each of the multiple RF chains based on a parameter value defined in the respective OFDM parameter set.

Abstract translation: 一种支持多个正交频分复用（OFDM）参数集的无线通信系统中的通信装置和方法。 一种方法包括为多个射频（RF）链中的每一个确定相应的OFDM参数集合; 以及基于在各个OFDM参数集中定义的参数值来处理所述多个RF链中的每一个中的OFDM信号。

公开(公告)号：US20110032872A1

公开(公告)日：2011-02-10

申请号：US12806150

申请日：2010-08-06

Applicant: Shuangfeng Han ,  Zhen Wang ,  Ho-Kyu Choi ,  Cheng Shan

Inventor： Shuangfeng Han ,  Zhen Wang ,  Ho-Kyu Choi ,  Cheng Shan

IPC: H04W40/00

CPC classification number: H04B7/065 ,  H04B7/0639

Abstract: A method and apparatus reduce overhead of feedback in a closed loop Multiple Input Multiple Output (MIMO) system. A controller feeds back the long-term Precoder Matrix Index (PMI) to a serving base station under direction of the serving base station when the long term PMI feedback transmission is required, generates a new codebook using the long term PMI, and determines a short term PMI from the new codebook. A feedback transmitter feeds back the short-term PMI to the serving base station.

Abstract translation: 一种方法和装置降低了闭环多输入多输出（MIMO）系统中反馈的开销。 当需要长期PMI反馈传输时，控制器在服务基站的指示下向服务基站反馈长期预编码矩阵索引（PMI），使用长期PMI生成新的码本，并且确定短 来自新码本的PMI。 反馈发射机将短期PMI反馈给服务基站。

公开(公告)号：US20100002643A1

公开(公告)日：2010-01-07

申请号：US12498585

申请日：2009-07-07

Applicant: Shuangfeng Han ,  Eun-Yong Kim ,  Hyeon-Woo Lee ,  Ho-Kyu Choi ,  Joon-Ho Park ,  David Mazzarese ,  Bruno Clerckx ,  Song-Nam Hong

Inventor： Shuangfeng Han ,  Eun-Yong Kim ,  Hyeon-Woo Lee ,  Ho-Kyu Choi ,  Joon-Ho Park ,  David Mazzarese ,  Bruno Clerckx ,  Song-Nam Hong

IPC: H04B15/00 ,  H04B7/02 ,  H04W28/00

CPC classification number: H04B7/0417 ,  H04B7/024 ,  H04B7/0486 ,  H04B7/063 ,  H04B7/0639 ,  H04J11/0056

Abstract: A method for operating a Mobile Station (MS) in a Multiple Input Multiple Output (MIMO) wireless communication system is provided. The method includes measuring channel quality for a serving Base Station (BS), if the channel quality is less than a threshold, measuring interference power from one or more neighbor BSs, determining a Precoding Matrix Index (PMI) and a priority metric for each neighbor BS, and feeding back at least one of the PMI, a PMI type indicator, the priority metric, and the channel quality to the serving BS.

Abstract translation: 提供了一种用于在多输入多输出（MIMO）无线通信系统中操作移动台（MS）的方法。 该方法包括测量服务基站（BS）的信道质量，如果信道质量小于阈值，测量来自一个或多个相邻BS的干扰功率，确定每个邻居的预编码矩阵索引（PMI）和优先权度量 BS，并且向服务BS反馈PMI，PMI类型指示符，优先级度量和信道质量中的至少一个。

公开(公告)号：US10056957B2

公开(公告)日：2018-08-21

申请号：US13572438

申请日：2012-08-10

Applicant: Shuangfeng Han ,  Bruno Clerckx

Inventor： Shuangfeng Han ,  Bruno Clerckx

IPC: H04B7/06 ,  H04B7/0413 ,  H04L27/26 ,  H04L1/00

CPC classification number: H04B7/0617 ,  H04B7/0413 ,  H04L1/0025 ,  H04L27/2626

Abstract: A method provides mixed analog/digital beamforming by a transmitter in a mobile communication system. The method includes converting a modulation symbol into a parallel symbol stream, performing digital beamforming on the parallel symbol stream, performing an IFFT operation on the digital-beamformed parallel symbol stream to generate a time-domain symbol, converting the IFFT-operated time-domain symbol into a serial time-domain symbol, inserting a CP into the serial time-domain symbol, performing a DAC operation on the CP-inserted symbol to generate an analog signal, and performing analog beamforming by multiplying the analog signal by the analog beamforming precoder optimized for the first subcarrier transmitted through at least one RF channel.

公开(公告)号：US09432102B2

公开(公告)日：2016-08-30

申请号：US12907291

申请日：2010-10-19

Applicant: Sang-Woo Lee ,  Hee-Won Kang ,  Shuangfeng Han ,  David Mazzarese

Inventor： Sang-Woo Lee ,  Hee-Won Kang ,  Shuangfeng Han ,  David Mazzarese

IPC: H04B1/00 ,  H04B7/06 ,  H04B15/00 ,  H04B17/327 ,  H04B17/345

CPC classification number: H04B7/0639 ,  H04B17/327 ,  H04B17/345

Abstract: Provided is a device and a method for eliminating inter-cell interference in Multiple Input Multiple Output (MIMO) wireless communication system. The method for operating a user equipment for eliminating the inter-cell interference includes determining one or more optimum bands among bands not requested to be restricted from a neighboring cell, determining at least one of band and Precoding Matrix Index (PMI) to be requested to be restricted to the neighboring cell among the determined one or more optimum bands, and feeding back at least one of the band and PMI to be requested to be restricted to the neighboring cell to a serving base station.

Abstract translation: 提供了一种用于消除多输入多输出（MIMO）无线通信系统中的小区间干扰的装置和方法。 用于操作用于消除小区间干扰的用户设备的方法包括：确定从邻近小区未被请求的限制的频带中的一个或多个最佳频带，确定要请求的频带和预编码矩阵索引（PMI）中的至少一个 在所确定的一个或多个最佳频带中被限制到相邻小区，并将要被限制的要被限制的频带和PMI中的至少一个反馈给服务基站。

公开(公告)号：US09030949B2

公开(公告)日：2015-05-12

申请号：US12578353

申请日：2009-10-13

Applicant: Shuangfeng Han ,  Zhen Wang ,  Eunyong Kim ,  Clerckx Bruno

Inventor： Shuangfeng Han ,  Zhen Wang ,  Eunyong Kim ,  Clerckx Bruno

IPC: H04L12/26 ,  H04B7/06 ,  H04B7/04 ,  H04L25/03

CPC classification number: H04B7/0639 ,  H04B7/0478 ,  H04L2025/03426

Abstract: A Mobile Station (MS) apparatus and a Base Station (BS) apparatus, and methods for their operation in a wireless communication system, are provided. The method for operating the MS includes receiving Precoding Matrix Index (PMI) subset information from a BS, determining downlink channel quality of the BS, determining a PMI for the BS based on the PMI subset information and the determined downlink channel quality of the BS, and transmitting the determined PMI to the BS.

Abstract translation: 移动台（MS）装置和基站（BS）装置及其在无线通信系统中的操作方法。 用于操作MS的方法包括从BS接收预编码矩阵索引（PMI）子集信息，确定BS的下行链路信道质量，基于PMI子集信息和所确定的BS的下行链路信道质量来确定BS的PMI， 以及将确定的PMI发送到BS。