公开(公告)号：US08340703B2

公开(公告)日：2012-12-25

申请号：US12833318

申请日：2010-07-09

Applicant: Rajiv Laroia ,  Pablo Anigstein ,  Arnab Das ,  Sundeep Rangan

Inventor： Rajiv Laroia ,  Pablo Anigstein ,  Arnab Das ,  Sundeep Rangan

IPC: H04B15/00

CPC classification number: H04W56/00 ,  H04B7/2678 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0053 ,  H04W52/0206 ,  H04W72/1278 ,  Y02D70/449

Abstract: A multi-mode base station includes a transmit standby mode and an active mode. Transmit standby mode of base station operation is a low power/low interference level of operation as compared to active mode. In transmit standby mode at least some of the synchronization signaling such as pilot tone signaling is reduced in power level and/or rate with respect to the active mode. In transmit standby mode, the base station has no active state registered wireless terminals being serviced but may have some sleep state registered wireless terminals being serviced. Mode transitions from active to transmit standby may be in response to: a detected period of inactivity, scheduling information, base station mode change signals, and/or detected wireless terminal state transition. Mode transitions from transmit standby to active may be in response to: scheduling information, access signals, wake-up signals, hand-off signals, wireless terminal state change signals, and/or base station mode change signals.

Abstract translation: 多模式基站包括发送待机模式和活动模式。 与主动模式相比，基站操作的发送待机模式是低功耗/低干扰电平。 在发送待机模式中，诸如导频音调信令的至少一些同步信令相对于活动模式降低功率电平和/或速率。 在发送待机模式中，基站没有被激活状态登记的无线终端被服务，但是可能有一些睡眠状态登记的无线终端被维护。 模式从有效切换到发送备用的转换可以是：检测到的不活动时段，调度信息，基站模式改变信号和/或检测到的无线终端状态转换。 从发射待机状态转换为有效的模式可以响应于：调度信息，接入信号，唤醒信号，切换信号，无线终端状态改变信号和/或基站模式改变信号。

公开(公告)号：US08150345B2

公开(公告)日：2012-04-03

申请号：US12413527

申请日：2009-03-28

Applicant: Subhadeep P. Roy ,  Niranjan N. Ratnakar ,  Sundeep Rangan

Inventor： Subhadeep P. Roy ,  Niranjan N. Ratnakar ,  Sundeep Rangan

IPC: H04B17/02

CPC classification number: H04B7/0854 ,  H04B7/0417

Abstract: A signal received via a plurality of antennas, and containing an interference component and a desired communication component, is processed to suppress the interference component. The interference component is suppressed based on an inverse of a spatial covariance matrix, which inverse is produced without performing a matrix inversion operation.

Abstract translation: 处理经由多个天线接收并包含干扰成分和期望的通信部件的信号，以抑制干扰成分。 基于空间协方差矩阵的逆，抑制干扰分量，而不执行矩阵求逆运算而产生反相。

公开(公告)号：US07957757B2

公开(公告)日：2011-06-07

申请号：US11773939

申请日：2007-07-05

Applicant: Samel Celebi ,  Charles Stanski ,  Sundeep Rangan

Inventor： Samel Celebi ,  Charles Stanski ,  Sundeep Rangan

IPC: H04Q7/20

CPC classification number: H04W52/50 ,  H04W52/10 ,  H04W52/146

Abstract: Provided is an feedback mechanism to correct power control information in a broadcast signal that is determined to be incorrect by one or more devices that receive and rely on the broadcast information. A device that receives the incorrect broadcast information can determine a correction and to the information and provide a recommendation to the source of the broadcast information. The source can selectively determine whether to modify the broadcast information based on the recommendation from one or more devices. If the broadcast information is modified, subsequent devices that receive the broadcast information are provided with the modified information. If further changes are needed, the subsequent devices can provide further recommended changes.

Abstract translation: 提供了一种反馈机制，用于校正由接收并依赖于广播信息的一个或多个设备确定为不正确的广播信号中的功率控制信息。 接收不正确的广播信息的设备可以确定对该信息的修正和提供对广播信息的来源的推荐。 源可以基于来自一个或多个设备的推荐来选择性地确定是否修改广播信息。 如果广播信息被修改，则接收广播信息的后续设备被提供修改的信息。 如果需要进一步的更改，后续设备可以提供进一步的建议更改。

公开(公告)号：US20110085611A1

公开(公告)日：2011-04-14

申请号：US12833318

申请日：2010-07-09

Applicant: Rajiv Laroia ,  Pablo A. Anigstein ,  Arnab Das ,  Sundeep Rangan

Inventor： Rajiv Laroia ,  Pablo A. Anigstein ,  Arnab Das ,  Sundeep Rangan

IPC: H04W40/00 ,  H04J11/00

CPC classification number: H04W56/00 ,  H04B7/2678 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0053 ,  H04W52/0206 ,  H04W72/1278 ,  Y02D70/449

Abstract: A multi-mode base station includes a transmit standby mode and an active mode. Transmit standby mode of base station operation is a low power/low interference level of operation as compared to active mode. In transmit standby mode at least some of the synchronization signaling such as pilot tone signaling is reduced in power level and/or rate with respect to the active mode. In transmit standby mode, the base station has no active state registered wireless terminals being serviced but may have some sleep state registered wireless terminals being serviced. Mode transitions from active to transmit standby may be in response to: a detected period of inactivity, scheduling information, base station mode change signals, and/or detected wireless terminal state transition. Mode transitions from transmit standby to active may be in response to: scheduling information, access signals, wake-up signals, hand-off signals, wireless terminal state change signals, and/or base station mode change signals.

Abstract translation: 多模式基站包括发送待机模式和活动模式。 与主动模式相比，基站操作的发送待机模式是低功耗/低干扰电平。 在发送待机模式中，诸如导频音调信令的至少一些同步信令相对于活动模式降低功率电平和/或速率。 在发送待机模式中，基站没有被激活状态登记的无线终端被服务，但是可能有一些睡眠状态登记的无线终端被维护。 模式从有效切换到发送备用的转换可以是：检测到的不活动时段，调度信息，基站模式改变信号和/或检测到的无线终端状态转换。 从发射待机状态转换为有效的模式可以响应于：调度信息，接入信号，唤醒信号，切换信号，无线终端状态改变信号和/或基站模式改变信号。

公开(公告)号：US20110075639A1

公开(公告)日：2011-03-31

申请号：US12958676

申请日：2010-12-02

Applicant: Sundeep Rangan ,  Junyi Li

Inventor： Sundeep Rangan ,  Junyi Li

IPC: H04W72/04 ,  H04J3/06

CPC classification number: H04W56/0045 ,  H04L5/003 ,  H04L5/0078 ,  H04L5/0098

Abstract: The claimed subject matter relates to acquiring channel access in a wireless communication environment. A wireless terminal may transmit first and second sets of tones over respective first and second contiguous transmission periods. The first and second tone sets may be disjoint from each other and may each comprise a number of contiguous tones. The terminal may then refrain from transmitting during a third time period in order to receive a grant signal from a base station in response to the access request. The beginnings of the first time period and the second time period may be a function of a determined uplink transmission time.

Abstract translation: 所要求保护的主题涉及在无线通信环境中获取信道接入。 无线终端可以在相应的第一和第二连续传输周期上传送第一和第二组音调。 第一和第二音调集可以彼此不相交，并且可以各自包括多个连续的音调。 然后终端可以在第三时间段期间避免发送，以便响应于接入请求从基站接收授权信号。 第一时间段和第二时间段的开始可以是确定的上行链路传输时间的函数。

公开(公告)号：US20090131069A1

公开(公告)日：2009-05-21

申请号：US11943512

申请日：2007-11-20

Applicant: Xinzhou Wu ,  Sundeep Rangan ,  Prashanth Hande ,  Arnab Das ,  Junyi Li

Inventor： Xinzhou Wu ,  Sundeep Rangan ,  Prashanth Hande ,  Arnab Das ,  Junyi Li

IPC: H04Q7/20

CPC classification number: H04W72/085 ,  H04W72/0406

Abstract: Systems and methodologies are described that facilitate scheduling uplink transmissions. For instance, a time sharing scheme can be utilized such that differing mobile devices can be scheduled to transmit during differing time slots; however, it is also contemplated that a static scheme can be employed. Pursuant to an illustration, an interference budget can be combined with a time varying weighting factor associated with a base station; the weighting factor can be predefined and/or adaptively adjusted (e.g., based upon a load balancing mechanism). Moreover, the weighted interference budget can be leveraged for selecting mobile devices for uplink transmission (e.g., based at least in part upon path loss ratios of the mobile devices). Further, disparate interference budgets can be utilized by differing channels of a sector at a particular time. Also, for example, a base station can assign a loading factor to be utilized by wireless terminal(s) for generating channel quality report(s).

公开(公告)号：US20090131068A1

公开(公告)日：2009-05-21

申请号：US11943504

申请日：2007-11-20

Applicant: Xinzhou Wu ,  Sundeep Rangan ,  Prashanth Hande ,  Arnab Das ,  Junyi Li

Inventor： Xinzhou Wu ,  Sundeep Rangan ,  Prashanth Hande ,  Arnab Das ,  Junyi Li

IPC: H04Q7/20

CPC classification number: H04W72/1231 ,  H04W72/1268

Abstract: Systems and methodologies are described that facilitate scheduling uplink transmissions. For instance, a time sharing scheme can be utilized such that differing mobile devices can be scheduled to transmit during differing time slots; however, it is also contemplated that a static scheme can be employed. Pursuant to an illustration, an interference budget can be combined with a time varying weighting factor associated with a base station; the weighting factor can be predefined and/or adaptively adjusted (e.g., based upon a load balancing mechanism). Moreover, the weighted interference budget can be leveraged for selecting mobile devices for uplink transmission (e.g., based at least in part upon path loss ratios of the mobile devices). Further, disparate interference budgets can be utilized by differing channels of a sector at a particular time. Also, for example, a base station can assign a loading factor to be utilized by wireless terminal(s) for generating channel quality report(s).

公开(公告)号：US07397838B2

公开(公告)日：2008-07-08

申请号：US11168210

申请日：2005-06-27

Applicant: Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Pramod Viswanath

Inventor： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Pramod Viswanath

IPC: H04B1/713

CPC classification number: H04B1/7143 ,  H04B1/7156 ,  H04B2001/71563 ,  H04L5/0019 ,  H04L5/0048 ,  H04L25/0226 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2675

Abstract: A base station having the strongest downlink signal is identified by utilizing a unique slope of a pilot tone hopping sequence being transmitted by a base station. Specifically, base station identification is realized by determining the slope of the strongest received pilot signal, i.e., the received pilot signal having the maximum energy. In an embodiment of the invention, the pilot tone hopping sequence is based on a Latin Squares sequence. With a Latin Squares based pilot tone hopping sequence, all a mobile user unit needs is to locate the frequency of the pilot tones at one time because the pilot tone locations at subsequent times can be determined from the slope of the Latin Squares pilot tone hopping sequence. The slope and initial frequency shift of the pilot tone hopping sequence with the strongest received power is determined by employing a unique maximum energy detector.

Abstract translation: 通过利用由基站发送的导频音跳频序列的唯一斜率，来识别具有最强下行链路信号的基站。 具体地，通过确定最强接收导频信号的斜率，即具有最大能量的接收导频信号来实现基站识别。 在本发明的实施例中，导频音跳频序列基于拉丁方阵序列。 利用基于拉丁方阵的导频音跳频序列，移动用户单元需要的是一次定位导频音频的频率，因为可以从拉丁方正导频音跳频序列的斜率确定随后时间的导频音位置 。 具有最强接收功率的导频音跳频序列的斜率和初始频移通过采用独特的最大能量检测器来确定。

公开(公告)号：US20070104164A1

公开(公告)日：2007-05-10

申请号：US11487017

申请日：2006-07-14

Applicant: Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan ,  Prashanth Hande ,  Arnab Das

Inventor： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan ,  Prashanth Hande ,  Arnab Das

IPC: H04Q7/24

CPC classification number: H04W24/08 ,  H04B17/345 ,  H04B17/382 ,  H04W72/08

Abstract: A wireless terminal receives and measures broadcast reference signals, e.g., beacon and/or pilot signals, transmitted from a plurality of base station attachment points. The wireless terminal monitors for and attempts to recover broadcast loading factor information corresponding to attachment points. The wireless terminal generates and transmits an interference report to a current attachment point, the report based on the results of a measured received reference signal from the current attachment point, a measured received reference signal from each of one or more different attachment points, and uplink loading factor information. In the absence of a successfully recovered broadcast uplink loading factor corresponding to an attachment point, the wireless terminal uses a default value for that loading factor. Generated interference reports are based on beacon signal measurements and uplink loading factors, pilot signal measuereents and uplink loading factors, or a mixture of beacon and pilot signal measurements and uplink loading factors.

Abstract translation: 无线终端接收并测量从多个基站附接点发送的广播参考信号，例如信标和/或导频信号。 无线终端监视并尝试恢复对应于附接点的广播加载因子信息。 无线终端根据来自当前附着点的测定的接收到的参考信号的结果，来自一个或多个不同的附接点的每一个的测量的接收参考信号以及上行链路 加载因子信息。 在没有对应于附接点的成功恢复的广播上行链路负载因子的情况下，无线终端使用该负载因子的默认值。 生成的干扰报告基于信标信号测量和上行链路负载因子，导频信号测量和上行链路负载因子，或信标和导频信号测量和上行链路负载因子的混合。

公开(公告)号：US20070066273A1

公开(公告)日：2007-03-22

申请号：US11229847

申请日：2005-09-19

Applicant: Rajiv Laroia ,  Pablo Anigstein ,  Arnab Das ,  Sundeep Rangan

Inventor： Rajiv Laroia ,  Pablo Anigstein ,  Arnab Das ,  Sundeep Rangan

IPC: H04B1/16

CPC classification number: H04W52/0235 ,  H04W52/0206 ,  Y02D70/00

Abstract: Wireless terminal for use with a multi-mode base station that supports a transmit standby mode and an active mode is described. Transmit standby mode of base station operation is a low power/low interference level of operation as compared to active mode. In transmit standby mode at least some of the synchronization signaling such as pilot tone signaling is reduced in power level and/or rate with respect to the active mode. In transmit standby mode, the base station has no active state registered wireless terminals being serviced but may have some sleep state registered wireless terminals being serviced. Mode transitions from active to transmit standby may be in response to: a detected period of inactivity, scheduling information, base station mode change signals, and/or detected wireless terminal state transition. Mode transitions from transmit standby to active may be in response to: scheduling information, access signals, wake-up signals from the wireless terminal, hand-off signals, etc.

Abstract translation: 描述了与支持发送待机模式和活动模式的多模式基站一起使用的无线终端。 与主动模式相比，基站操作的发送待机模式是低功耗/低干扰电平。 在发送待机模式中，诸如导频音调信令的至少一些同步信令相对于活动模式降低功率电平和/或速率。 在发送待机模式中，基站没有被激活状态登记的无线终端被服务，但是可能有一些睡眠状态登记的无线终端被维护。 模式从有效切换到发送备用的转换可以是：检测到的不活动时段，调度信息，基站模式改变信号和/或检测到的无线终端状态转换。 从发射待机到激活的模式转换可以响应于：调度信息，接入信号，来自无线终端的唤醒信号，切换信号等。