公开(公告)号：US08085653B2

公开(公告)日：2011-12-27

申请号：US11852277

申请日：2007-09-08

Applicant: Wendy C. Wong ,  Shilpa Talwar

Inventor： Wendy C. Wong ,  Shilpa Talwar

IPC: H04W4/00 ,  H04M1/00 ,  H04L27/28 ,  H04J11/00

CPC classification number: H04B7/0632 ,  H04B7/022

Abstract: Beamforming with nulling techniques for wireless communications networks are disclosed. For example, an apparatus may include a beamforming module and a weight determination module. The beamforming module applies beamforming weights to a downlink user channel with a first mobile station. The weight determination module determines the beamforming weights based on user channel information and interfering channel information. This user channel information is received from the first mobile station and includes characteristics of the downlink user channel. However, the interfering channel information includes characteristics of one or more downlink interfering channels received by one or more further mobile stations. These downlink interfering channels are associated with transmissions across the downlink user channel with the first mobile station.

Abstract translation: 公开了用于无线通信网络的归零技术的波束成形。 例如，装置可以包括波束形成模块和权重确定模块。 波束成形模块利用第一移动台向下行链路用户信道应用波束成形权重。 权重确定模块基于用户信道信息和干扰信道信息来确定波束成形权重。 从第一移动站接收该用户信道信息，并且包括下行用户信道的特性。 然而，干扰信道信息包括由一个或多个其它移动站接收的一个或多个下行链路干扰信道的特性。 这些下行链路干扰信道与第一移动台与下行链路用户信道的传输相关联。

公开(公告)号：US20110268103A1

公开(公告)日：2011-11-03

申请号：US13177915

申请日：2011-07-07

Applicant: Shilpa Talwar ,  Nageen Himayat ,  Wan Choi ,  Qinghua Li

Inventor： Shilpa Talwar ,  Nageen Himayat ,  Wan Choi ,  Qinghua Li

IPC: H04B1/10 ,  H04W56/00

CPC classification number: H04L1/0625 ,  H04L27/2608 ,  H04L27/2655 ,  H04L2001/0092

Abstract: Techniques are described that can be used to maximize the interference suppression capability of space-time coded systems by managing synchronous transmission signaling. To enhance the probability of the occurrence synchronous interference and accordingly increase interference cancellation capability at a receiver, a network of at least two transmitters in a network may utilize similar structured coding schemes and coordinate transmission so that the receiver receives co-channel signals synchronously.

Abstract translation: 描述了可以用于通过管理同步传输信令来最大化空时编码系统的干扰抑制能力的技术。 为了增强发生同步干扰的概率并相应地增加接收机的干扰消除能力，网络中的至少两个发射机的网络可以利用类似的结构化编码方案和协调传输，使得接收机同步地接收同频道信号。

公开(公告)号：US20110002270A1

公开(公告)日：2011-01-06

申请号：US12822925

申请日：2010-06-24

Applicant: Nageen Himayat ,  Shilpa Talwar ,  Honggang Li ,  Jaroslaw J. Sydir ,  Kerstin Johnsson ,  Shu-Ping Yeh

Inventor： Nageen Himayat ,  Shilpa Talwar ,  Honggang Li ,  Jaroslaw J. Sydir ,  Kerstin Johnsson ,  Shu-Ping Yeh

IPC: H04W40/00

CPC classification number: H04L12/66 ,  H04L27/2607 ,  H04L27/2656 ,  H04L27/2666 ,  H04W16/12 ,  H04W28/04 ,  H04W52/10 ,  H04W52/146 ,  H04W56/0045 ,  H04W72/00 ,  H04W84/045 ,  H04W88/08 ,  Y02D70/122 ,  Y02D70/124 ,  Y02D70/14

Abstract: Embodiments of a base station and method for reducing asynchronous interference in a multi-tier OFDMA overlay network are generally described herein. In some embodiments, a lower-tier base station is configured to adjust OFDMA frame boundaries to cause frames communicated by a higher-tier to arrive within a cyclic prefix at the lower-tier base station. The lower-tier base station may also be configured to adjust OFDMA frame boundaries to cause frames communicated by a lower-tier of the network to arrive within a cyclic prefix at a higher-tier mobile station. Accordingly, frames from one tier may arrive within the cyclic prefix of another thereby reducing asynchronous interference.

Abstract translation: 本文中一般地描述了用于减少多层OFDMA覆盖网络中的异步干扰的基站和方法的实施例。 在一些实施例中，低层基站被配置为调整OFDMA帧边界，以使由较高层传送的帧在低层基站处的循环前缀内到达。 低层基站还可以被配置为调整OFDMA帧边界，以使得由较低层网络传送的帧在较高层移动站处的循环前缀内到达。 因此，来自一个层的帧可以在另一层的循环前缀内到达，从而减少异步干扰。

公开(公告)号：US20100331000A1

公开(公告)日：2010-12-30

申请号：US12456987

申请日：2009-06-24

Applicant: Jing Zhu ,  Xiangying Yang ,  Shilpa Talwar ,  Muthaiah Venkatachalam

Inventor： Jing Zhu ,  Xiangying Yang ,  Shilpa Talwar ,  Muthaiah Venkatachalam

IPC: H04W36/00 ,  H04W36/34

CPC classification number: H04W36/245 ,  H04W84/045

Abstract: The present invention discloses a method including: storing identification information or location information for a handover previously performed by a mobile system; estimating when the mobile system enters within a coverage area of a target femtocell; recognizing the coverage area based on the identification information or the location information; and scanning for the target-femtocell prior to handover.

Abstract translation: 本发明公开了一种方法，包括：存储用于由移动系统先前执行的切换的识别信息或位置信息; 估计何时移动系统在目标毫微微小区的覆盖区域内进入; 基于识别信息或位置信息识别覆盖区域; 并在切换之前扫描目标毫微微小区。

公开(公告)号：US20100246538A1

公开(公告)日：2010-09-30

申请号：US12415957

申请日：2009-03-31

Applicant: Vladimir Kravtsov ,  Yuval Lomnitz ,  Clark Chen ,  Shilpa Talwar ,  Nageen Himayat ,  Li Li ,  Hua Yang ,  Homgmei Sun

Inventor： Vladimir Kravtsov ,  Yuval Lomnitz ,  Clark Chen ,  Shilpa Talwar ,  Nageen Himayat ,  Li Li ,  Hua Yang ,  Homgmei Sun

IPC: H04J3/00

CPC classification number: H04W72/06 ,  H04W28/08 ,  H04W72/082

Abstract: A method for managing and allocating radio resources (RRMA method) of multiple radio resource types to subscriber stations is disclosed. The RRMA method includes bandwidth partitioning, into parts comprising “slots” with a given reuse pattern, a selection rule, to select a “cell, reuse pattern” pair serving each user, and an allocation rule, for distributing to each user an appropriate number of bandwidth slots from the selected “cell, reuse pattern” pair. After an adaptation period, the method reaches a desired fairness, while simultaneously reaching a maximal mean throughput, possible under this fairness. For big networks, the method provides basically decentralized radio resource management. The RRMA method is useful to cellular networks having a single set of orthogonal sub-channels (frequency/time slots) being reused by all network cells, such as time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), or OFDMA/TDMA cellular systems. Particularly, the method is applicable in fractional frequency reuse cellular networks.

Abstract translation: 公开了一种用于向用户站管理和分配多种无线电资源类型的无线电资源（RRMA方法）的方法。 RRMA方法包括带宽划分，包括具有给定重复使用模式的“时隙”的部分，选择规则，以选择为每个用户提供服务的“小区，重用模式”对以及分配规则，用于向每个用户分配适当的号码 来自所选择的“小区，重用模式”对的带宽时隙。 在适应期后，该方法达到期望的公平性，同时达到最大平均吞吐量，这在公平性下是可能的。 对于大型网络，该方法基本上提供了分散的无线资源管理。 RRMA方法对于具有由所有网络小区重新使用的单组正交子信道（频率/时隙）的蜂窝网络是有用的，诸如时分多址（TDMA），正交频分多址（OFDMA）或 OFDMA / TDMA蜂窝系统。 特别地，该方法适用于分数频率复用蜂窝网络。

公开(公告)号：US20100020702A1

公开(公告)日：2010-01-28

申请号：US11963445

申请日：2007-12-21

Applicant: Wendy C. Wong ,  Shilpa Talwar

Inventor： Wendy C. Wong ,  Shilpa Talwar

IPC: H04L12/26

CPC classification number: H04L43/08 ,  H04L41/5009 ,  H04L41/5035 ,  H04L43/16 ,  H04W72/046 ,  H04W72/082

Abstract: Techniques involving beamforming are disclosed. For example, For instance an apparatus may select a first mobile station served by a first base station and a second mobile station served by a second base station. Based on this selection, a quality metric may be determined that is based on a strength of a user link and a strength of an interfering link. The user link is associated with service of the first mobile station and the interfering link is associated with service of the second mobile station. When the quality metric is greater than a predetermined threshold, the apparatus may designate the first and second mobile stations as suitable for beamforming service in a same resource allocation. Also, techniques are disclosed for determining whether a mobile station is a cell edge mobile station.

Abstract translation: 公开了涉及波束形成的技术。 例如，设备可以选择由第二基站服务的第一基站和第二移动台服务的第一移动台。 基于该选择，可以基于用户链接的强度和干扰链路的强度来确定质量度量。 用户链路与第一移动台的服务相关联，并且干扰链路与第二移动台的服务相关联。 当质量度量大于预定阈值时，装置可以在相同的资源分配中将第一和第二移动台指定为适合于波束成形服务。 此外，公开了用于确定移动站是小区边缘移动站的技术。

公开(公告)号：US20070211813A1

公开(公告)日：2007-09-13

申请号：US11373654

申请日：2006-03-10

Applicant: Shilpa Talwar ,  Roopsha Samanta ,  Nageen Himayat

Inventor： Shilpa Talwar ,  Roopsha Samanta ,  Nageen Himayat

IPC: H04L1/02

CPC classification number: H04B7/0417 ,  H04B7/0456 ,  H04B7/0626 ,  H04B7/0639 ,  H04L5/023 ,  H04L25/03343 ,  H04L27/2626 ,  H04L27/2647 ,  H04L2025/03802

Abstract: Methods and systems for communicating in a wireless network include mitigating co-channel interference (CCI) for precoded multiple-input multiple-output (MIMO) systems and incorporating the effect of CCI mitigation on channel characteristics in the design of channel state information (CSI) feedback mechanisms. Various embodiments and variants are also disclosed.

Abstract translation: 用于在无线网络中通信的方法和系统包括减轻用于预编码的多输入多输出（MIMO）系统的同信道干扰（CCI），并且在信道状态信息（CSI）设计中并入CCI减轻对信道特性的影响， 反馈机制。 还公开了各种实施例和变型。

公开(公告)号：US06442214B1

公开(公告)日：2002-08-27

申请号：US09574498

申请日：2000-05-19

Applicant: Helmut Boleskei ,  Peroor K. Sebastian ,  Shilpa Talwar ,  Arogyaswami J. Paulraj

Inventor： Helmut Boleskei ,  Peroor K. Sebastian ,  Shilpa Talwar ,  Arogyaswami J. Paulraj

IPC: H04L2704

CPC classification number: H04B7/0854 ,  H04B7/10 ,  H04B7/12 ,  H04L27/2602

Abstract: The present invention provides a diversity transmission system. The diversity transmission system includes a diversity transmitter receiving incoming symbols. The diversity transmitter includes at least one transmitter antenna transmitting a plurality of multi-carrier modulated signals. Each multi-carrier-modulated signal includes a corresponding processed symbol sub-block stream. Each symbol of the processed symbol sub-block stream is based on a linear transform of a plurality of incoming symbols. The diversity transmission system further includes a diversity receiver. The diversity receiver includes at least one receiver antenna receiving the plurality of multi-carrier modulated signals after the multi-carrier modulated signals having been modified by transmission channels between the transmitter antennas and the receiver antenna. The diversity receiver further includes at least one multi-carrier demodulator for demodulating the received multi-carrier modulated signals and generating a demodulated symbol stream. A symbol-processing unit receives the demodulated symbol stream and generates a stream of outgoing symbols. The invention also includes a diversity transmitter. The diversity transmitter includes a symbol-processing unit for receiving a stream of incoming symbols and generating a plurality of processed symbol streams. The processed symbol streams are based on linear transforms of the incoming symbols. A plurality of multi-carrier modulators generate a plurality of multiple-carrier modulated signals. Each multi-carrier modulator receives a corresponding processed symbol stream and generates a multiple-carrier-modulated signal based on the corresponding processed symbol stream.

Abstract translation: 本发明提供一种分集传输系统。 分集传输系统包括接收输入符号的分集发射机。 分集发射机包括发送多个多载波调制信号的至少一个发射机天线。 每个多载波调制信号包括相应的处理符号子块流。 经处理的符号子块流的每个符号基于多个输入符号的线性变换。 分集传输系统还包括分集接收机。 分集接收机包括至少一个在多载波调制信号已被发射机天线和接收机天线之间的传输信道修改的接收多载波调制信号的接收天线。 分集接收机还包括至少一个多载波解调器，用于解调所接收的多载波调制信号并产生解调符号流。 符号处理单元接收解调的符号流并产生输出符号流。 本发明还包括分集发射机。 分集发射机包括用于接收输入符号流并生成多个经处理符号流的符号处理单元。 经处理的符号流基于输入符号的线性变换。 多个多载波调制器产生多个多载波调制信号。 每个多载波调制器接收对应的经处理符号流，并且基于对应的经处理符号流生成多载波调制信号。

公开(公告)号：US20220124588A1

公开(公告)日：2022-04-21

申请号：US17561897

申请日：2021-12-24

Applicant: Jing Zhu ,  Menglei Zhang ,  Juan Fang ,  Shu-ping Yeh ,  Shilpa Talwar ,  Valerie Parker

Inventor： Jing Zhu ,  Menglei Zhang ,  Juan Fang ,  Shu-ping Yeh ,  Shilpa Talwar ,  Valerie Parker

IPC: H04W36/22 ,  H04W36/00 ,  H04W28/02

Abstract: The present disclosure is related to multi-queue management techniques and packet reordering techniques for inter-radio access technology (RAT) and intra-RAT traffic steering. The multi-queue management and packet reordering techniques may be used in Multi-Access Management Services (MAMS) framework, which is a programmable framework that provides mechanisms for the flexible selection of network paths in a multi-access (MX) communication environment, based on an application's needs. Other embodiments may be described and/or claimed.

公开(公告)号：US09491776B2

公开(公告)日：2016-11-08

申请号：US14498526

申请日：2014-09-26

Applicant: Ehsan Aryafar ,  Roya Doostnejad ,  Shilpa Talwar

Inventor： Ehsan Aryafar ,  Roya Doostnejad ,  Shilpa Talwar

IPC: H04W72/12 ,  H04L5/14 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04W72/1231 ,  H04L5/0073 ,  H04L5/14 ,  H04W72/046

Abstract: Certain embodiments herein relate to scheduling interference between wireless devices in a manner that reduced interference associated with full duplex communication. Signal strength and interference information associated with communication between wireless devices may be collected and forwarded to a processing device, such as a central controller. The central controller may utilize such information to generate a conflict graph that depicts interference relationships between the wireless devices. Using the conflict graph, the central controller may determine whether requested communications may be scheduled along with concurrently scheduled communications without resulting in interference affecting the communications. In one embodiment, a requested communication may be scheduled with other concurrently scheduled communications if the aggregated throughput is increased with the addition of the requested communication.

Abstract translation: 本文中的某些实施例涉及以减少与全双工通信相关联的干扰的方式来调度无线设备之间的干扰。 可以收集与无线设备之间的通信相关联的信号强度和干扰信息，并将其转发到诸如中央控制器的处理设备。 中央控制器可以利用这样的信息来产生描绘无线设备之间的干扰关系的冲突图。 使用冲突图，中央控制器可以确定所请求的通信可以与并行调度的通信一起被调度，而不会造成影响通信的干扰。 在一个实施例中，如果通过添加所请求的通信来增加聚合的吞吐量，则可以利用其他并行调度的通信来调度所请求的通信。