公开(公告)号：US08687588B2

公开(公告)日：2014-04-01

申请号：US12483652

申请日：2009-06-12

Applicant: Parvathanathan Subrahmanya

Inventor： Parvathanathan Subrahmanya

IPC: H04W4/00

CPC classification number: H04W88/08 ,  H04W52/0206 ,  H04W52/244 ,  H04W52/287 ,  H04W52/322 ,  H04W52/325 ,  H04W84/045 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/23

Abstract: Devices and methods are provided for deploying and/or implementing a low power mode in an access point (AP) base station. The low power mode may be implemented based on the presence and/or status of access terminals (ATs). In one embodiment, the method may involve determining whether any ATs are present within at least one defined coverage area. In another embodiment, the method may involve determining whether the ATs are in an idle or active state.

Abstract translation: 提供了用于在接入点（AP）基站中部署和/或实现低功率模式的设备和方法。 低功率模式可以基于接入终端（AT）的存在和/或状态来实现。 在一个实施例中，该方法可以包括确定在至少一个定义的覆盖区域内是否存在任何AT。 在另一个实施例中，该方法可以涉及确定AT是处于空闲还是活动状态。

公开(公告)号：US08615260B2

公开(公告)日：2013-12-24

申请号：US13331050

申请日：2011-12-20

Applicant: Parvathanathan Subrahmanya

Inventor： Parvathanathan Subrahmanya

IPC: H04W68/00

CPC classification number: H04W68/00 ,  H04W52/0216 ,  Y02D70/00

Abstract: A wireless communications network (120) responds to each incoming call placed to a wireless communications device (134) by transmitting a call-paging message (418) within a corresponding partition of a digital radio frame of prescribed format. Responsive to each occurrence of a broadcast event (404), the network transmits (414) a repeating broadcast-paging message announcing the availability of broadcast content from the network. The broadcast-paging message is transmitted multiple times within each digital radio frame. Another sequence (500) describes WCD operation in this network. Responsive to wakeup (502) from sleep, the WCD detects (509) received signal quality. The WCD also receives (510) scheduled network transmission of a call-paging message and a number of instances (at least one) of a repeating network transmitted broadcast-paging message that occurs multiple times for each scheduled transmission of the call-paging message. This number varies inversely with the detected signal quality.

Abstract translation: 无线通信网络（120）通过在规定格式的数字无线电帧的相应分区内发送呼叫寻呼消息（418）来响应放置到无线通信设备（134）的每个呼入呼叫。 响应于广播事件的每次发生（404），网络发送（414）重播广播 - 寻呼消息，通知广播内容的可用性。 在每个数字无线电帧内广播 - 寻呼消息被多次发送。 另一个序列（500）描述了该网络中的WCD操作。 响应唤醒（502）从睡眠，WCD检测（509）接收信号质量。 WCD还接收（510）呼叫寻呼消息的调度网络传输和针对呼叫寻呼消息的每个调度传输多次发生的重复网络发送的广播寻呼消息的多个实例（至少一个）。 该数字与检测到的信号质量成反比。

公开(公告)号：US08358604B2

公开(公告)日：2013-01-22

申请号：US12646286

申请日：2009-12-23

Applicant: An-swol C. Hu ,  Jittra Jootar ,  Parvathanathan Subrahmanya

Inventor： An-swol C. Hu ,  Jittra Jootar ,  Parvathanathan Subrahmanya

IPC: H04B7/00

CPC classification number: H04B1/7083

Abstract: The described apparatus and methods may include a receiver configured to receive a signal, the signal being a combination of physical channel signals that each correspond to a different one of a plurality of physical channels, and a controller configured to capture signal energy from at least two of the physical channel signals, and detect a cell based on the captured signal energy.

Abstract translation: 所描述的装置和方法可以包括被配置为接收信号的接收机，该信号是每个对应于多个物理信道中的不同一个物理信道的物理信道信号的组合，以及被配置为从至少两个 的物理信道信号，并且基于所捕获的信号能量来检测小区。

公开(公告)号：US08098780B2

公开(公告)日：2012-01-17

申请号：US12711991

申请日：2010-02-24

Applicant: Thejaswi Bharadwaj Madapushi Shesha ,  Brian Dong ,  Messay Amerga ,  Chih-Ping Hsu ,  Parvathanathan Subrahmanya ,  Xiaoming Zhu

Inventor： Thejaswi Bharadwaj Madapushi Shesha ,  Brian Dong ,  Messay Amerga ,  Chih-Ping Hsu ,  Parvathanathan Subrahmanya ,  Xiaoming Zhu

IPC: H03D1/06

CPC classification number: H04B1/7117 ,  B60L2200/26

Abstract: A rake receiver finger assignor is configured to assign a rake receiver finger to a time offset between identified signal path time offsets in accordance with a concentration of identified signal paths from a transmitter to a rake receiver. In accordance with the exemplary embodiment, a number of identified signal paths having time offsets within a time window are observed to determine the concentration of signal paths identified by a path searcher. If the number of identified signal paths indicates a concentrated distribution of signal paths such as during a fat path condition, at least one rake finger is assigned between at a time offset between two identified signal paths.

Abstract translation: 耙式接收器手指分配器被配置为根据从发射机到耙式接收机的识别的信号路径的浓度，将耙机接收机手指分配到所识别的信号路径时间偏移之间的时间偏移。 根据示例性实施例，观察到在时间窗内具有时间偏移的多个识别的信号路径，以确定由路径搜索器识别的信号路径的浓度。 如果所识别的信号路径的数量表示信号路径的集中分布，例如在脂肪路径条件期间，则在两个识别的信号路径之间的时间偏移处分配至少一个耙指。

公开(公告)号：US08064556B2

公开(公告)日：2011-11-22

申请号：US11502178

申请日：2006-08-09

Applicant: Parvathanathan Subrahmanya ,  Inyup Kang ,  Jia Fei ,  Rajesh Sundaresan

Inventor： Parvathanathan Subrahmanya ,  Inyup Kang ,  Jia Fei ,  Rajesh Sundaresan

IPC: H04B1/10

CPC classification number: H04B1/71057 ,  H04B7/0669 ,  H04B7/0673 ,  H04B7/0845 ,  H04L25/03044 ,  H04L25/03292 ,  H04L2025/03509

Abstract: This disclosure describes equalization techniques for spread spectrum wireless communication. The techniques may involve estimating a channel impulse response, estimating channel variance, and selecting filter coefficients for an equalizer based on the estimated channel impulse response and the estimated channel variance. Moreover, in accordance with this disclosure, the channel variance estimation involves estimation of two or more co-variances for different received samples. Importantly, the equalizer is “fractionally spaced,” which means that the equalizer defines fractional filtering coefficients (filter taps), unlike conventional equalizers that presume that filter coefficients are defined at integer chip spacing. The techniques can allow the equalizer to account for antenna diversity, such as receive diversity, transmit diversity, or possibly both.

Abstract translation: 本公开描述了用于扩频无线通信的均衡技术。 这些技术可以包括基于所估计的信道脉冲响应和所估计的信道方差估计信道脉冲响应，估计信道方差，以及为均衡器选择滤波器系数。 此外，根据本公开，信道方差估计涉及对于不同接收样本的两个或多个协方差的估计。 重要的是，均衡器是“分数间隔”的，这意味着均衡器定义了分数滤波系数（滤波器抽头），不同于传统的均衡器，假设滤波器系数是以整数芯片间隔定义的。 这些技术可以允许均衡器考虑天线分集，例如接收分集，发射分集，或者可能两者。

公开(公告)号：US08023988B2

公开(公告)日：2011-09-20

申请号：US12111092

申请日：2008-04-28

Applicant: Da-Shan Shiu ,  Serge Willenegger ,  Richard Chi ,  Parvathanathan Subrahmanya ,  Chih-Ping Hsu

Inventor： Da-Shan Shiu ,  Serge Willenegger ,  Richard Chi ,  Parvathanathan Subrahmanya ,  Chih-Ping Hsu

IPC: H04B7/00 ,  H04B1/04 ,  H04B1/38

CPC classification number: H04W52/12 ,  H04W52/20 ,  H04W52/267 ,  H04W52/283 ,  H04W52/286 ,  H04W52/44

Abstract: Techniques to more efficiently control the transmit power for a data transmission that uses a number of formats (e.g., rates, transport formats). Different formats for a given data channel (e.g., transport channel) may require different target SNIRs to achieved a particular BLER. In one aspect, individual target BLER may be specified for each format of each data channel. In another aspect, various power control schemes are provided to achieve different target SNIRs for different formats. In a first power control scheme, multiple individual outer loops are maintained for multiple formats. For each format, its associated outer loop attempts to set the target SNIR such that the target BLER specified for that format is achieved. In a second power control scheme, multiple individual outer loops are maintained and the base station further applies different adjustments to the transmit power levels for different formats.

Abstract translation: 用于更有效地控制使用多种格式（例如，速率，传输格式）的数据传输的发射功率的技术。 给定数据信道（例如，传输信道）的不同格式可能需要不同的目标SNIR来实现特定的BLER。 在一个方面，可以为每个数据信道的每个格式指定单个目标BLER。 在另一方面，提供各种功率控制方案以实现用于不同格式的不同目标SNIR。 在第一功率控制方案中，为多种格式维护多个单独的外环。 对于每个格式，其关联的外部循环尝试设置目标SNIR，使得为该格式指定的目标BLER被实现。 在第二功率控制方案中，保持多个单独的外环，并且基站进一步对不同格式的发射功率电平进行不同的调整。

公开(公告)号：US20110149757A1

公开(公告)日：2011-06-23

申请号：US12646286

申请日：2009-12-23

Applicant: An-swol C. Hu ,  Jittra Jootar ,  Parvathanathan Subrahmanya

Inventor： An-swol C. Hu ,  Jittra Jootar ,  Parvathanathan Subrahmanya

IPC: H04L12/26 ,  H04W40/00

CPC classification number: H04B1/7083

Abstract: The described apparatus and methods may include a receiver configured to receive a signal, the signal being a combination of physical channel signals that each correspond to a different one of a plurality of physical channels, and a controller configured to capture signal energy from at least two of the physical channel signals, and detect a cell based on the captured signal energy.

Abstract translation: 所描述的装置和方法可以包括被配置为接收信号的接收机，该信号是每个对应于多个物理信道中的不同一个物理信道的物理信道信号的组合，以及被配置为从至少两个 的物理信道信号，并且基于所捕获的信号能量来检测小区。

公开(公告)号：US20110051831A1

公开(公告)日：2011-03-03

申请号：US12552673

申请日：2009-09-02

Applicant: Parvathanathan Subrahmanya ,  Andrew Sendonaris ,  Jia Tang ,  Atul A. Salvekar ,  Shantanu Khare ,  Jong Hyeon Park ,  Brian C. Banister ,  Tao Cui

Inventor： Parvathanathan Subrahmanya ,  Andrew Sendonaris ,  Jia Tang ,  Atul A. Salvekar ,  Shantanu Khare ,  Jong Hyeon Park ,  Brian C. Banister ,  Tao Cui

IPC: H04L5/12 ,  H03M13/45 ,  G06F11/10

CPC classification number: H04L1/06 ,  H04L1/005 ,  H04L1/0051 ,  H04L25/03171

Abstract: Certain aspects of the present disclosure relate to a method and an apparatus for unified iterative demodulation-decoding that can be employed in both multiple-input multiple-output (MIMO) and non-MIMO wireless systems.

Abstract translation: 本公开的某些方面涉及可以在多输入多输出（MIMO）和非MIMO无线系统中使用的用于统一迭代解调 - 解码的方法和装置。

公开(公告)号：US20100260155A1

公开(公告)日：2010-10-14

申请号：US12772792

申请日：2010-05-03

Applicant: Francesco Grilli ,  Charles E. Wheatley, III ,  Serge Willenegger ,  Parvathanathan Subrahmanya

Inventor： Francesco Grilli ,  Charles E. Wheatley, III ,  Serge Willenegger ,  Parvathanathan Subrahmanya

IPC: H04W56/00

CPC classification number: H04W56/002 ,  H04B7/2668 ,  H04B2201/70702 ,  H04W56/001 ,  H04W56/0015 ,  H04W56/0045 ,  H04W92/20

Abstract: Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment, differences between the arrival times of transmissions from the base stations, as observed at the terminal, are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme, a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements, the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally, the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise, the terminal sets the frame-level part to a predetermined value (e.g., zero).

Abstract translation: 将来自多个基站的传输时间对齐到终端的方案。 为了实现时间对准，确定在终端观察到的来自基站的传输的到达时间之间的差异，并将其提供给系统，并用于调整基站处的定时，使得终端专用无线帧到达 终端在特定的时间窗口内。 在一个方案中，两个基站之间的时差被划分为帧级时间差和码片级时间差。 无论何时请求执行和报告时差测量，终端测量每个候选基站相对于参考基站的芯片级定时。 此外，终端还测量帧级定时，并且仅在需要时在时差测量中包括该信息。 否则，终端将帧级部分设置为预定值（例如，零）。

公开(公告)号：US07702350B2

公开(公告)日：2010-04-20

申请号：US10387973

申请日：2003-03-12

Applicant: Hyukjun Oh ,  Luca Blessent ,  Chih-Ping Hsu ,  Da-Shan Shiu ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

Inventor： Hyukjun Oh ,  Luca Blessent ,  Chih-Ping Hsu ,  Da-Shan Shiu ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

IPC: H04B7/00 ,  H04B1/00 ,  H01Q11/12

CPC classification number: H04W52/362 ,  H04W52/12 ,  H04W52/143 ,  H04W52/24 ,  H04W52/367

Abstract: Techniques to quickly adjust an SIR target toward a final value needed to achieve a specified target BLER for a data transmission. The outer loop may be implemented with multiple modes. The SIR target may be maintained fixed in a hold mode, adjusted in large down steps to speed up convergence in an acquisition mode, and adjusted by a small down step and a large up step for good and erased blocks, respectively, in a tracking mode. Various schemes may be used to adjust the SIR target by larger down steps in the acquisition mode. These schemes may be used even if data is transmitted intermittently, the target BLER is set to a low value, and/or one or multiple transport channels are used for data transmission. The SIR target may be boosted by a particular amount upon transitioning from the acquisition mode to the tracking mode.

Abstract translation: 将SIR目标快速调整到实现数据传输的指定目标BLER所需的最终值的技术。 外部环路可以用多种模式来实现。 SIR目标可以在保持模式下保持固定，在大的下降步骤中调整以加速采集模式中的收敛，并且在跟踪模式下分别对于好的和擦除的块分别进行小的向下步长和大的上升步长的调整 。 可以使用各种方案来在采集模式中通过较大的下降步骤来调整SIR目标。 即使间歇地发送数据，目标BLER被设置为低值，和/或一个或多个传输信道用于数据传输，也可以使用这些方案。 在从采集模式转换到跟踪模式时，SIR目标可以被提升特定的量。