公开(公告)号：US20120190378A1

公开(公告)日：2012-07-26

申请号：US13358386

申请日：2012-01-25

Applicant: Shuangfeng Han ,  Chi-Woo Lim

Inventor： Shuangfeng Han ,  Chi-Woo Lim

IPC: H04W24/00 ,  H04W72/08 ,  H04W40/00

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：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：US08542635B2

公开(公告)日：2013-09-24

申请号：US12915814

申请日：2010-10-29

Applicant: Shuangfeng Han ,  Chi-Woo Lim

Inventor： Shuangfeng Han ,  Chi-Woo Lim

IPC: H04W72/04 ,  H04B7/06

CPC classification number: H04B7/024 ,  H04B17/12

Abstract: A calibration apparatus and a calibration method for multicell Multiple Input Multiple Output (MIMO) transmission in a multiple antenna system are provided. More particularly, an operating method of a Mobile Station (MS) for performing calibration for multicell MIMO transmission in a multiple antenna system includes negotiating a multi-Base Station (BS) joint processing with a BS, receiving a control message including information instructing multi-BS calibration for sounding based on the multi-BS joint processing, from the BS; when receiving the control message involving the multi-BS joint processing, generating a second sounding sequence by mapping estimated phases of downlink channels per subcarrier of BSs to a first sounding sequence allocated from the BS, and transmitting the second sounding sequence, including the phases of the downlink channels per subcarrier, over a sounding symbol interval with respect to each of the BSs involving the multi-BS joint processing. Hence, feedback overhead in the calibration of the multicell MIMO transmission can be reduced.

Abstract translation: 提供了一种用于多天线系统中的多输入多输入多输出（MIMO）传输的校准装置和校准方法。 更具体地说，用于在多天线系统中进行多单元MIMO传输的校准的移动台（MS）的操作方法包括：与BS协商多基站（BS）联合处理，接收包括指示多台天线的信息的控制消息， 基于BS的校准基于多BS联合处理，从BS; 当接收到涉及多BS联合处理的控制消息时，通过将BS的每个子载波的下行链路信道的估计相位映射到从BS分配的第一探测序列，并发送第二探测序列，生成第二探测序列， 相对于涉及多BS联合处理的每个BS的探测符号间隔，每个子载波的下行链路信道。 因此，可以减少多单元MIMO传输的校准中的反馈开销。

公开(公告)号：US20120231830A1

公开(公告)日：2012-09-13

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: H04W72/02 ,  H04W24/02

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：US08923329B2

公开(公告)日：2014-12-30

申请号：US12806363

申请日：2010-08-11

Applicant: Tae-Young Kim ,  Sung-Eun Park ,  Chi-Woo Lim ,  Ho-Kyu Choi ,  Jae-Weon Cho

Inventor： Tae-Young Kim ,  Sung-Eun Park ,  Chi-Woo Lim ,  Ho-Kyu Choi ,  Jae-Weon Cho

IPC: H04J3/16 ,  H04L27/26 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04L27/2656 ,  H04L5/0007 ,  H04L5/003 ,  H04L27/2666 ,  H04W72/0453 ,  H04W72/0493

Abstract: An apparatus and method support various system bandwidths in a broadband wireless communication system. A Mobile Station (MS) operation includes determining a system bandwidth through a primary preamble for frame synchronization, which a Base Station (BS) transmits. A Fast Fourier Transform (FFT) size, the number of guard subcarriers, and the number of used subcarriers corresponding to the system bandwidth are determined using a first table. An operation parameter of a modem is set according to the FFT size, the number of guard subcarriers, and the number of used subcarriers.

Abstract translation: 一种装置和方法支持宽带无线通信系统中的各种系统带宽。 移动站（MS）操作包括通过基站（BS）发送的用于帧同步的主前导码确定系统带宽。 使用第一表确定快速傅里叶变换（FFT）大小，保护子载波的数量以及与系统带宽对应的使用的子载波的数量。 根据FFT大小，保护子载波的数量和所使用的子载波的数量来设置调制解调器的操作参数。

公开(公告)号：US08909276B2

公开(公告)日：2014-12-09

申请号：US13527001

申请日：2012-06-19

Applicant: Chi-Woo Lim ,  Hyun-Kyu Yu ,  Kyung-Kyu Kim ,  Su-Ryong Jeong

Inventor： Chi-Woo Lim ,  Hyun-Kyu Yu ,  Kyung-Kyu Kim ,  Su-Ryong Jeong

IPC: H04B7/00 ,  H04W56/00

CPC classification number: H04W56/002 ,  H04W76/14

Abstract: A method and an apparatus for obtaining synchronization of a terminal for communication between devices when a base station collapses are provided. The method includes, when a preamble signal is not received from the base station, maintaining a first synchronization for a predetermined time using a timer, transmitting a first preamble signal at a first synchronization point, performing a synchronization procedure with at least one neighbor terminal based on the first preamble signal, and, after the synchronization procedure, performing communication with the at least one neighbor terminal. In addition, when a preamble signal is not received from a base station, a first preamble signal from a relevant neighbor terminal is monitored for a predetermined time. When the first preamble signal is not received from the relevant neighbor terminal for the predetermined time, a second preamble signal is transmitted at an arbitrary point.

Abstract translation: 提供了一种用于当基站崩溃时获得终端用于通信的终端的同步的方法和装置。 该方法包括：当没有从基站接收到前同步信号时，使用定时器保持预定时间的第一同步，在第一同步点发送第一前导信号，与至少一个相邻终端进行同步过程 在第一前导信号上，并且在同步过程之后，执行与至少一个相邻终端的通信。 此外，当没有从基站接收到前导信号时，来自相关邻居终端的第一前导信号被监视预定时间。 当在预定时间内没有从相关邻居终端接收到第一前导信号时，在任意点发送第二前同步码信号。

公开(公告)号：US08625478B2

公开(公告)日：2014-01-07

申请号：US12011328

申请日：2008-01-25

Applicant: Chi-Woo Lim ,  Song-Nam Hong ,  Mi-Hyun Lee ,  Dong-Seek Park ,  Ho-Kyu Choi ,  Jae-Weon Cho

Inventor： Chi-Woo Lim ,  Song-Nam Hong ,  Mi-Hyun Lee ,  Dong-Seek Park ,  Ho-Kyu Choi ,  Jae-Weon Cho

IPC: H04B7/14

CPC classification number: H04W28/10 ,  H04L1/1812 ,  H04L1/1887 ,  H04L1/1896

Abstract: A method to transmit a packet of a BS in a communication system using a HARQ scheme is provided. The method includes assigning resource for transmitting a packet to a mobile station, and transmitting a first packet to the mobile station using the assigned resource; transmitting timing information on which a second packet is transmitted to the mobile station when the BS does not receive information indicating that the mobile station decoded the first packet successfully or when the BS receives information indicating that the mobile station failed to decode the first packet; and transmitting the second packet to the mobile station on a timing point corresponding to the timing information.

Abstract translation: 提供了一种使用HARQ方案在通信系统中发送BS的分组的方法。 该方法包括向移动台分配用于发送分组的资源，以及使用所分配的资源向移动台发送第一分组; 当BS没有接收到指示移动台成功解码第一分组的信息或当BS接收到指示移动台未能解码第一分组的信息时，发送向移动台发送第二分组的定时信息; 以及在对应于所述定时信息的定时点上将所述第二分组发送到所述移动台。

公开(公告)号：US08582594B2

公开(公告)日：2013-11-12

申请号：US13304467

申请日：2011-11-25

Applicant: Chi-Woo Lim ,  Hyun-Kyu Yu ,  Hyun-Jeong Kang

Inventor： Chi-Woo Lim ,  Hyun-Kyu Yu ,  Hyun-Jeong Kang

IPC: H04J3/26

CPC classification number: H04L1/1854 ,  H04L2001/0093 ,  H04W8/26 ,  H04W72/0406 ,  H04W72/121

Abstract: An apparatus and a method for supporting periodic multicast transmission in a machine type communication system are provided. A method for operating a Base Station (BS) in a communication system includes allocating persistent resources for data transmission of a service group, selecting at least one MS to feed back a success/failure in receiving a map including the persistent resource allocation information, among Mobile Stations (MSs) to receive the persistent resource allocation information, and transmitting the map including the persistent resource allocation information and information indicating the selected MS.

Abstract translation: 提供一种用于在机器型通信系统中支持周期性多播传输的装置和方法。 一种用于在通信系统中操作基站（BS）的方法包括为服务组的数据传输分配持久资源，在接收包括持续资源分配信息的映射之间选择至少一个MS以反馈成功/失败，其中 移动站（MS），用于接收持续资源分配信息，并发送包括持久资源分配信息和指示所选MS的信息的映射。

公开(公告)号：US08548472B2

公开(公告)日：2013-10-01

申请号：US13171913

申请日：2011-06-29

Applicant: Chi-Woo Lim ,  Mi-Hyun Lee

Inventor： Chi-Woo Lim ,  Mi-Hyun Lee

IPC: H04W36/00 ,  H04W24/00

CPC classification number: H04W48/20 ,  H04W24/10 ,  H04W64/006 ,  H04W84/045 ,  H04W84/047

Abstract: A Mobile Station (MS) operation method for cell selection at initial access in a wireless communication system in which one or more small Base Stations (BSs) are included within a macro BS service coverage area is provided. The method includes performing synchronization based on a preamble signal, after performing the synchronization, transmitting a ranging code to a first BS, after transmitting the ranging code, transmitting a ranging request message including position information of the MS, to the first BS, and receiving a ranging response message including information on at least one candidate BS from the first BS. Thus, the MS can select a BS using position information of the MS in a wireless communication system in which various types of BSs coexist.

Abstract translation: 提供了一种在无线通信系统中初始接入小区选择的移动站（MS）操作方法，其中一个或多个小型基站（BS）包括在宏BS服务覆盖区域内。 该方法包括：在执行同步之后，在发送测距码之后，执行同步之后，将测距码发送给第一BS，将包括MS的位置信息的测距请求消息发送到第一BS，并接收 测距响应消息，包括关于来自第一BS的至少一个候选BS的信息。 因此，MS可以在各种类型的BS共存的无线通信系统中使用MS的位置信息来选择BS。