公开(公告)号：US08625693B2

公开(公告)日：2014-01-07

申请号：US12912080

申请日：2010-10-26

申请人： Jiann-An Tsai ,  Zhouyue Pi ,  Sudhir Ramakrishna

发明人： Jiann-An Tsai ,  Zhouyue Pi ,  Sudhir Ramakrishna

IPC分类号： H04B7/02 ,  H04L27/00 ,  H04M11/00

CPC分类号： H04B7/0617 ,  H04B7/0626 ,  H04L25/0204 ,  H04L25/03343 ,  H04L2025/03808

摘要： Methods for a transmitter station and a receiver station to perform beamforming in a wireless communication system, and a transmitter station and a receiver station to perform the corresponding method, are provided. The method for the transmitter station to perform beamforming in the wireless communication system includes estimating and tracking a long-term averaged and normalized channel correlation matrix between the transmitter station and a receiver station, determining beamforming coefficients based on the tracked long-term averaged and normalized channel correlation matrix, and communicating with the receiver station using the determined beamforming coefficients, wherein the receiver station also estimates and tracks the long term averaged and normalized channel correlation matrix, and determines beamforming coefficients based on the tracked long-term averaged and normalized channel correlation matrix.

摘要翻译： 发送站和接收站在无线通信系统中执行波束成形的方法以及发送站和接收站来执行相应的方法。 发射机站在无线通信系统中执行波束成形的方法包括估计和跟踪发射机站和接收机站之间的长期平均和归一化的信道相关矩阵，基于被跟踪的长期平均和归一化的波长成形系数 信道相关矩阵，并且使用所确定的波束形成系数与接收机站进行通信，其中接收机站还估计和跟踪长期平均和归一化的信道相关矩阵，并且基于跟踪的长期平均和归一化信道相关性来确定波束成形系数 矩阵。

公开(公告)号：US08879532B2

公开(公告)日：2014-11-04

申请号：US12722425

申请日：2010-03-11

申请人： Jiann-An Tsai ,  Zhouyue Pi ,  Kaushik Josiam ,  Farooq Khan ,  Sudhir Ramakrishna

发明人： Jiann-An Tsai ,  Zhouyue Pi ,  Kaushik Josiam ,  Farooq Khan ,  Sudhir Ramakrishna

IPC分类号： H04L1/00 ,  H04L25/02 ,  H04L5/00

CPC分类号： H04L5/0051 ,  H04L1/1819 ,  H04L5/0007 ,  H04L5/005 ,  H04L5/0073 ,  H04L25/0224

摘要： A method and base station apparatus for transmitting pilot data in a wireless communication system, and a method and mobile station apparatus for receiving pilot data in a wireless communication system are provided. The method for transmitting pilot data in a wireless communication system includes determining a pilot pattern in at least one resource block for each of one or more pilot streams, and transmitting the one or more pilot streams based on the determined respective pilot pattern in the at least one resource block, wherein the at least one resource block comprises a plurality of subcarriers and a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols.

摘要翻译： 一种用于在无线通信系统中发送导频数据的方法和基站装置，以及用于在无线通信系统中接收导频数据的方法和移动站装置。 用于在无线通信系统中发送导频数据的方法包括：针对一个或多个导频流中的每一个确定至少一个资源块中的导频模式，以及至少基于所确定的相应导频模式来发送所述一个或多个导频流 一个资源块，其中所述至少一个资源块包括多个子载波和多个正交频分复用（OFDM）符号。

公开(公告)号：US08843129B2

公开(公告)日：2014-09-23

申请号：US12961334

申请日：2010-12-06

申请人： Ying Li ,  Zhouyue Pi ,  Sudhir Ramakrishna ,  Baowei Ji

发明人： Ying Li ,  Zhouyue Pi ,  Sudhir Ramakrishna ,  Baowei Ji

IPC分类号： H04W24/00 ,  H04W36/00 ,  H04W84/04

CPC分类号： H04W36/0061 ,  H04W84/045

摘要： A subscriber station can efficiently determine an accessible base station by scanning a subset of base stations based on an optimized list received from a serving base station. The subscriber station includes a white list that contains information regarding a number of closed subscriber group (CSG) base stations to which the subscriber station is subscribed. The subscriber station can transmit a request message that includes one or more of: indication of whether the detected identifier of the femto base station is in the whitelist or not; and its location information. In response, the base station can send a message that includes the nearby femtocells and whether the femtocell is accessible or inaccessible to the subscriber station. The femto base station can be designed to be in transmission off mode when none of its subscribers is in its coverage. The serving base station can select a set of the accessible femtocells to the subscriber station, and request the selected femtocells to monitor an uplink signaling of the subscriber station so that the femtocell can be awaken when the femtocell is in transmission off mode or be aware that the subscriber station is in proximity, if the uplink signaling is detected.

摘要翻译： 用户站可以基于从服务基站接收到的优化列表来扫描基站的子集，来有效地确定可访问的基站。 用户站包括白名单，其包含关于用户台订阅的封闭用户组（CSG）基站的数量的信息。 用户台可以发送包括以下中的一个或多个的请求消息：毫微微基站的检测到的标识符是否在白名单中的指示; 及其位置信息。 作为响应，基站可以发送包括附近的毫微微小区的消息以及毫微微小区是否可访问或用户台不可访问。 当毫微微基站的用户没有覆盖时，毫微微基站可以被设计为处于传输关闭模式。 服务基站可以向用户台选择一组可访问的毫微微小区，并且请求所选择的毫微微小区监视用户站的上行链路信令，以便当毫微微小区处于传输关闭模式时可以唤醒毫微微小区，或者意识到 如果检测到上行链路信令，则用户站处于接近状态。

公开(公告)号：US20110086651A1

公开(公告)日：2011-04-14

申请号：US12856166

申请日：2010-08-13

申请人： Ying LI ,  Baowei JI ,  Zhouyue PI ,  Jung Je SON ,  Sudhir Ramakrishna ,  Youngkyo BAEK

发明人： Ying LI ,  Baowei JI ,  Zhouyue PI ,  Jung Je SON ,  Sudhir Ramakrishna ,  Youngkyo BAEK

IPC分类号： H04B15/00

CPC分类号： H04W28/04 ,  H04W4/06 ,  H04W84/045

摘要： A method and a Mobile Station (MS), for use in a wireless communication network comprising a plurality of Base Stations (BSs) capable of communicating with a plurality of MSs, wherein at least some of the BSs are Femtocell BSs (FBSs) and at least some of the BSs are Macrocell BSs (MBSs), for mitigating interference are provided. The method includes detecting, by an MS, an interfering Closed Subscriber Group (CSG) FBS that the MS is not authorized to access, and transmitting, by the MS, a request for mitigation of interference.

摘要翻译： 一种用于包括能够与多个MS进行通信的多个基站（BS）的无线通信网络中的方法和移动站（MS），其中至少一些BS是毫微微小区BS（FBS），并且在 至少一些BS是Macrocell BS（MBS），用于减轻干扰。 该方法包括由MS检测MS未被授权访问的干扰封闭用户组（CSG）FBS，以及由MS发送减轻干扰的请求。

公开(公告)号：US20110170480A1

公开(公告)日：2011-07-14

申请号：US12951952

申请日：2010-11-22

申请人： Zhouyue Pi ,  Sudhir Ramakrishna ,  Kaushik Josiam

发明人： Zhouyue Pi ,  Sudhir Ramakrishna ,  Kaushik Josiam

IPC分类号： H04W4/00

CPC分类号： H04W48/12 ,  H04L1/0041 ,  H04L1/0061 ,  H04W88/08 ,  H04W92/10

摘要： A base station is provided. The base station includes a transmit path circuitry that generates a masking sequence to mask a cyclic redundancy check of a control channel information element. The masking sequence includes a 4-bit prefix. The three least significant bits of the 4-bit prefix indicate a message type of the control channel information element. A subscriber station is also provided. The subscriber station includes a receive path circuitry that determines a message type of a control channel information element using a three least significant bits of a 4-bit prefix of a masking sequence used to mask a cyclic redundancy check of the control channel information element.

摘要翻译： 提供基站。 基站包括产生屏蔽序列以掩蔽控制信道信息元素的循环冗余校验的发送路径电路。 屏蔽序列包括4位前缀。 4位前缀的三个最低有效位表示控制信道信息元素的消息类型。 还提供了一个用户台。 用户站包括接收路径电路，其使用用于屏蔽控制信道信息元素的循环冗余校验的屏蔽序列的4比特前缀的三个最低有效位来确定控制信道信息元素的消息类型。

公开(公告)号：US09100897B2

公开(公告)日：2015-08-04

申请号：US12951952

申请日：2010-11-22

申请人： Zhouyue Pi ,  Sudhir Ramakrishna ,  Kaushik Josiam

发明人： Zhouyue Pi ,  Sudhir Ramakrishna ,  Kaushik Josiam

IPC分类号： H04W4/00 ,  H04W48/12 ,  H04W88/08

CPC分类号： H04W48/12 ,  H04L1/0041 ,  H04L1/0061 ,  H04W88/08 ,  H04W92/10

摘要： A base station is provided. The base station includes a transmit path circuitry that generates a masking sequence to mask a cyclic redundancy check of a control channel information element. The masking sequence includes a 4-bit prefix. The three least significant bits of the 4-bit prefix indicate a message type of the control channel information element. A subscriber station is also provided. The subscriber station includes a receive path circuitry that determines a message type of a control channel information element using a three least significant bits of a 4-bit prefix of a masking sequence used to mask a cyclic redundancy check of the control channel information element.

摘要翻译： 提供基站。 基站包括产生屏蔽序列以掩蔽控制信道信息元素的循环冗余校验的发送路径电路。 屏蔽序列包括4位前缀。 4位前缀的三个最低有效位表示控制信道信息元素的消息类型。 还提供了一个用户台。 用户站包括接收路径电路，其使用用于屏蔽控制信道信息元素的循环冗余校验的屏蔽序列的4比特前缀的三个最低有效位来确定控制信道信息元素的消息类型。

公开(公告)号：US08989086B2

公开(公告)日：2015-03-24

申请号：US12944347

申请日：2010-11-11

申请人： Ying Li ,  Ji-Yun Seol ,  Young Bo Cho ,  Zhouyue Pi ,  Sudhir Ramakrishna ,  Kaushik Josiam ,  Jaehyuk Jang

发明人： Ying Li ,  Ji-Yun Seol ,  Young Bo Cho ,  Zhouyue Pi ,  Sudhir Ramakrishna ,  Kaushik Josiam ,  Jaehyuk Jang

IPC分类号： H04W4/00 ,  H04W28/04 ,  H04W4/06 ,  H04W64/00 ,  H04W84/04

CPC分类号： H04W28/04 ,  H04W4/06 ,  H04W64/00 ,  H04W84/045 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146

摘要： When a subscriber station (SS) encounters interference caused an interfering base station (BS), the interference can be mitigated regardless of whether the interfering base station is a CSG-Closed BS or whether the SS is connected to a serving BS. If the SS is not connected to a serving BS and cannot access the interfering BS, the SS will signal the interfering BS directly to request the interfering BS to perform IM. If the SS is a legal user, and conditions to initiate IM are met, the interfering BS will perform IM until conditions to terminate IM are met. If the SS is connected to a serving BS, the serving BS will request the interfering BS to perform or terminate interference mitigation (IM) on behalf of the SS if certain conditions are satisfied.

摘要翻译： 当用户站（SS）遇到造成干扰基站（BS）的干扰时，可以减轻干扰，而不管干扰基站是否为CSG封闭BS，或SS是否连接到服务BS。 如果SS未连接到服务BS并且不能访问干扰BS，则SS将直接通知干扰BS以请求干扰BS执行IM。 如果SS是合法用户，并且满足启动IM的条件，则干扰BS将执行IM直到满足终止IM的条件。 如果SS连接到服务BS，则如果满足某些条件，服务BS将请求干扰BS代表SS执行或终止干扰减轻（IM）。

公开(公告)号：US20120015649A1

公开(公告)日：2012-01-19

申请号：US12961334

申请日：2010-12-06

申请人： Ying Li ,  Zhouyue Pi ,  Sudhir Ramakrishna ,  Baowei Ji

发明人： Ying Li ,  Zhouyue Pi ,  Sudhir Ramakrishna ,  Baowei Ji

IPC分类号： H04W24/00

CPC分类号： H04W36/0061 ,  H04W84/045

摘要： A subscriber station can efficiently determine an accessible base station by scanning a subset of base stations based on an optimized list received from a serving base station. The subscriber station includes a white list that contains information regarding a number of closed subscriber group (CSG) base stations to which the subscriber station is subscribed. The subscriber station can transmit a request message that includes one or more of: indication of whether the detected identifier of the femto base station is in the whitelist or not; and its location information. In response, the base station can send a message that includes the nearby femtocells and whether the femtocell is accessible or inaccessible to the subscriber station. The femto base station can be designed to be in transmission off mode when none of its subscribers is in its coverage. The serving base station can select a set of the accessible femtocells to the subscriber station, and request the selected femtocells to monitor an uplink signaling of the subscriber station so that the femtocell can be awaken when the femtocell is in transmission off mode or be aware that the subscriber station is in proximity, if the uplink signaling is detected.

摘要翻译： 用户站可以基于从服务基站接收到的优化列表来扫描基站的子集，来有效地确定可访问的基站。 用户站包括白名单，其包含关于用户台订阅的封闭用户组（CSG）基站的数量的信息。 用户台可以发送包括以下中的一个或多个的请求消息：毫微微基站的检测到的标识符是否在白名单中的指示; 及其位置信息。 作为响应，基站可以发送包括附近的毫微微小区的消息以及毫微微小区是否可访问或用户台不可访问。 当毫微微基站的用户没有覆盖时，毫微微基站可以被设计为处于传输关闭模式。 服务基站可以向用户台选择一组可访问的毫微微小区，并且请求所选择的毫微微小区监视用户站的上行链路信令，以便当毫微微小区处于传输关闭模式时可以唤醒毫微微小区，或者意识到 如果检测到上行链路信令，则用户站处于接近状态。

公开(公告)号：US20110116480A1

公开(公告)日：2011-05-19

申请号：US12944347

申请日：2010-11-11

申请人： Ying Li ,  Ji-Yun Seol ,  Young Bo CHO ,  Zhouyue Pi ,  Sudhir Ramakrishna ,  Kaushik Josiam ,  Jaehyuk Jang

发明人： Ying Li ,  Ji-Yun Seol ,  Young Bo CHO ,  Zhouyue Pi ,  Sudhir Ramakrishna ,  Kaushik Josiam ,  Jaehyuk Jang

IPC分类号： H04B15/00 ,  H04W36/30

CPC分类号： H04W28/04 ,  H04W4/06 ,  H04W64/00 ,  H04W84/045 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146

摘要： When a subscriber station (SS) encounters interference caused an interfering base station (BS), the interference can be mitigated regardless of whether the interfering base station is a CSG-Closed BS or whether the SS is connected to a serving BS. If the SS is not connected to a serving BS and cannot access the interfering BS, the SS will signal the interfering BS directly to request the interfering BS to perform IM. If the SS is a legal user, and conditions to initiate IM are met, the interfering BS will perform IM until conditions to terminate IM are met. If the SS is connected to a serving BS, the serving BS will request the interfering BS to perform or terminate interference mitigation (IM) on behalf of the SS if certain conditions are satisfied.

摘要翻译： 当用户站（SS）遇到造成干扰基站（BS）的干扰时，可以减轻干扰，而不管干扰基站是否为CSG封闭BS，或SS是否连接到服务BS。 如果SS未连接到服务BS并且不能访问干扰BS，则SS将直接通知干扰BS以请求干扰BS执行IM。 如果SS是合法用户，并且满足启动IM的条件，则干扰BS将执行IM直到满足终止IM的条件。 如果SS连接到服务BS，则如果满足某些条件，服务BS将请求干扰BS代表SS执行或终止干扰减轻（IM）。

公开(公告)号：US09100227B2

公开(公告)日：2015-08-04

申请号：US13597073

申请日：2012-08-28

申请人： Jaspreet Singh ,  Sudhir Ramakrishna

发明人： Jaspreet Singh ,  Sudhir Ramakrishna

IPC分类号： H04L27/06 ,  H04L25/02 ,  H03D1/00 ,  H04L27/26

CPC分类号： H04L25/0212 ,  H04L25/0222 ,  H04L25/0224 ,  H04L27/2647

摘要： Channel time and frequency correlations are determined from OFDM symbols and subframes using appropriately scaled sums of the products of the received pilot symbols at predetermined intervals n in time and/or frequency of resource elements within the resource blocks of the subframes. The correlation estimates may optionally be improved using pilot symbols for a plurality of antennas and for a plurality of pilot signal ports, and across a plurality of subframes. The calculated channel time and frequency correlations may be employed to improve estimates of channel characteristics for purposes such as selection of a transmission mode between a base station and a user equipment on the channel or for the purpose of channel equalization and data demodulation.

摘要翻译： 使用在子帧的资源块内的资源元素的时间和/或频率上以预定间隔n的接收导频符号的乘积的适当缩放和来从OFDM符号和子帧确定信道时间和频率相关。 可以可选地使用用于多个天线和多个导频信号端口以及跨越多个子帧的导频符号来改进相关估计。 可以采用所计算的信道时间和频率相关性来改善信道特性的估计，例如在信道上选择基站和用户设备之间的传输模式，或者用于信道均衡和数据解调的目的。