公开(公告)号：US08549364B2

公开(公告)日：2013-10-01

申请号：US12388334

申请日：2009-02-18

申请人： Elisha Ziskind ,  Marc Sevigny ,  Sridhar Rajagopal ,  Rostislav Vavrick ,  Ronald Passerini

发明人： Elisha Ziskind ,  Marc Sevigny ,  Sridhar Rajagopal ,  Rostislav Vavrick ,  Ronald Passerini

IPC分类号： G06F11/00

CPC分类号： G06F11/0709 ,  G06F11/0757

摘要： In one or more embodiments of the invention, communication among host agents providing high availability in a computer cluster is implemented by reading and writing to files on a shared data store. Each host agent holds a lock on a file on the shared data store corresponding to a liveness indicator for the host agent and a coordinator host agent periodically monitors the liveness indicators for host failures.

摘要翻译： 在本发明的一个或多个实施例中，通过读取和写入共享数据存储器上的文件来实现在计算机集群中提供高可用性的主机代理之间的通信。 每个主机代理对共享数据存储器上的文件进行锁定，对应于用于主机代理的活动指示符，并且协调器主机代理周期性地监视主机故障的活动指示器。

公开(公告)号：US08924967B2

公开(公告)日：2014-12-30

申请号：US13096188

申请日：2011-04-28

申请人： Michael Nelson ,  Keith Farkas ,  Elisha Ziskind ,  Sridhar Rajagopal ,  Guoqiang Shu ,  Ron Passerini ,  Joanne Ren

发明人： Michael Nelson ,  Keith Farkas ,  Elisha Ziskind ,  Sridhar Rajagopal ,  Guoqiang Shu ,  Ron Passerini ,  Joanne Ren

IPC分类号： G06F15/173 ,  G06F9/455 ,  G06F9/46 ,  G06F11/00 ,  G06F9/54

CPC分类号： G06F11/1438 ,  G06F9/45533 ,  G06F9/542 ,  G06F11/0757

摘要： Embodiments maintain high availability of software application instances in a fault domain. Subordinate hosts are monitored by a master host. The subordinate hosts publish heartbeats via a network and datastores. Based at least in part on the published heartbeats, the master host determines the status of each subordinate host, distinguishing between subordinate hosts that are entirely inoperative and subordinate hosts that are operative but partitioned (e.g., unreachable via the network). The master host may restart software application instances, such as virtual machines, that are executed by inoperative subordinate hosts or that cease executing on partitioned subordinate hosts.

摘要翻译： 实施例在故障域中保持软件应用程序实例的高可用性。 主机由主机监控。 下级主机通过网络和数据存储发布心跳。 至少部分地基于所发布的心跳，主主机确定每个从属主机的状态，区分完全不起作用的下级主机和可操作但被分区的下级主机（例如，经由网络不可达）。 主主机可以重新启动由不能操作的下属主机执行的软件应用程序实例，例如虚拟机，或者停止在分区的下级主机上执行。

公开(公告)号：US08984508B2

公开(公告)日：2015-03-17

申请号：US13151862

申请日：2011-06-02

申请人： Guoqiang Shu ,  Keith Farkas ,  Eddie Ma ,  Michael Nelson ,  Elisha Ziskind ,  Sridhar Rajagopal ,  Minwen Ji

发明人： Guoqiang Shu ,  Keith Farkas ,  Eddie Ma ,  Michael Nelson ,  Elisha Ziskind ,  Sridhar Rajagopal ,  Minwen Ji

IPC分类号： G06F9/455 ,  G06F9/46 ,  G06F9/48 ,  G06F9/50

CPC分类号： G06F9/4818 ,  G06F9/45558 ,  G06F9/5077 ,  G06F2009/45575

摘要： A method for restarting a virtual machine in a virtual computing system having a plurality of hosts and a resource scheduler for the plurality of hosts includes writing a placement request for the virtual machine to a shared channel that is accessible by the resource scheduler. The method further includes reading a placement result from the shared channel, wherein the placement result is generated by the resource scheduler responsive to the placement request; and restarting the virtual machine in accordance with the placement result.

摘要翻译： 一种用于在具有多个主机和多个主机的资源调度器的虚拟计算系统中重新启动虚拟机的方法包括将虚拟机的放置请求写入由资源调度器可访问的共享信道。 所述方法还包括从所述共享信道读取布置结果，其中所述布局结果由所述资源调度器响应于所述放置请求而生成; 并根据放置结果重新启动虚拟机。

公开(公告)号：US20120278801A1

公开(公告)日：2012-11-01

申请号：US13096188

申请日：2011-04-28

申请人： Michael NELSON ,  Keith Farkas ,  Elisha Ziskind ,  Sridhar Rajagopal ,  Guoqiang Shu ,  Ron Passerini ,  Joanne Ren

发明人： Michael NELSON ,  Keith Farkas ,  Elisha Ziskind ,  Sridhar Rajagopal ,  Guoqiang Shu ,  Ron Passerini ,  Joanne Ren

IPC分类号： G06F9/455

CPC分类号： G06F11/1438 ,  G06F9/45533 ,  G06F9/542 ,  G06F11/0757

摘要： Embodiments maintain high availability of software application instances in a fault domain. Subordinate hosts are monitored by a master host. The subordinate hosts publish heartbeats via a network and datastores. Based at least in part on the published heartbeats, the master host determines the status of each subordinate host, distinguishing between subordinate hosts that are entirely inoperative and subordinate hosts that are operative but partitioned (e.g., unreachable via the network). The master host may restart software application instances, such as virtual machines, that are executed by inoperative subordinate hosts or that cease executing on partitioned subordinate hosts.

摘要翻译： 实施例在故障域中保持软件应用程序实例的高可用性。 主机由主机监控。 下级主机通过网络和数据存储发布心跳。 至少部分地基于所发布的心跳，主主机确定每个从属主机的状态，区分完全不起作用的从属主机和可操作但被分区的下级主机（例如，经由网络不可达）。 主主机可以重新启动由不能操作的下属主机执行的软件应用程序实例，例如虚拟机，或者停止在分区的下级主机上执行。

公开(公告)号：US09143211B2

公开(公告)日：2015-09-22

申请号：US13595811

申请日：2012-08-27

申请人： Zhouyue Pi ,  Omar El Ayach ,  Sridhar Rajagopal ,  Shadi Abu-Surra

发明人： Zhouyue Pi ,  Omar El Ayach ,  Sridhar Rajagopal ,  Shadi Abu-Surra

IPC分类号： H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04W52/22 ,  H04W52/30 ,  H04W52/42 ,  H04L27/26

CPC分类号： H04B7/0465 ,  H04B7/02 ,  H04B7/0426 ,  H04B7/043 ,  H04B7/0617 ,  H04B7/0897 ,  H04L27/2626 ,  H04W52/225 ,  H04W52/30 ,  H04W52/42

摘要： A method, apparatus, and system to transmit signals using multiple antennas with per-antenna power constraints. The method includes initializing a precoding algorithm to a complex matrix. The precoding algorithm is for precoding signals transmitted by a plurality of antennas. The method includes iteratively processing the precoding algorithm on a per-antenna basis by, at each iteration, sequentially updating a precoder for each of the plurality of antennas. The method includes, after each iteration, determining whether the precoding algorithm has converged based on a change in a rate of mutual information across iterations. Additionally, the method includes, in response to determining that the precoding algorithm has converged, transmitting the signals using the precoding algorithm.

摘要翻译： 一种使用具有每天线功率约束的多个天线发射信号的方法，装置和系统。 该方法包括将预编码算法初始化为复数矩阵。 预编码算法用于预编码由多个天线发送的信号。 该方法包括在每个天线的基础上迭代地处理预编码算法，在每个迭代中，顺序地更新多个天线中的每个天线的预编码器。 该方法包括在每次迭代之后，基于跨越迭代的互信息速率的变化来确定预编码算法是否已经收敛。 此外，该方法包括响应于确定预编码算法已经收敛，使用预编码算法发送信号。

公开(公告)号：US08929473B2

公开(公告)日：2015-01-06

申请号：US13552565

申请日：2012-07-18

申请人： Omar El Ayach ,  Sridhar Rajagopal ,  Shadi Abu-Surra ,  Zhouyue Pi

发明人： Omar El Ayach ,  Sridhar Rajagopal ,  Shadi Abu-Surra ,  Zhouyue Pi

IPC分类号： H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04L25/02

CPC分类号： H04B7/0478 ,  H04B7/0456 ,  H04B7/0465 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/065 ,  H04B7/0695 ,  H04B7/088 ,  H04L25/0224

摘要： A method and apparatus enable combined baseband (BB) and radio frequency (RF) processing of signals. The method includes receiving, by a receiver, channel estimation information for a channel between a transmitter and the receiver. The method includes identifying a plurality of paths in the channel based on the channel estimation information. The method includes calculating an RF precoding matrix for precoding one or more signals to be transmitted on each of the identified paths. The RF precoding matrix includes a phase shift for each of the identified paths. Additionally, the method includes calculating a BB precoding matrix for precoding the one or more signals by a BB precoding unit associated with the transmitter.

摘要翻译： 一种方法和装置使能信号的组合基带（BB）和射频（RF）处理。 该方法包括由接收机接收用于发射机和接收机之间的信道的信道估计信息。 该方法包括基于信道估计信息识别信道中的多个路径。 该方法包括计算一个RF预编码矩阵，用于对每个所识别的路径上要发送的一个或多个信号进行预编码。 RF预编码矩阵包括针对每个所识别的路径的相移。 此外，该方法包括：计算BB预编码矩阵，用于通过与发射机相关联的BB预编码单元对一个或多个信号进行预编码。

公开(公告)号：US08855496B2

公开(公告)日：2014-10-07

申请号：US12975225

申请日：2010-12-21

申请人： Sridhar Rajagopal ,  Eran Pisek ,  Farooq Khan ,  Ying Li

发明人： Sridhar Rajagopal ,  Eran Pisek ,  Farooq Khan ,  Ying Li

IPC分类号： H04B10/00 ,  H04B10/114 ,  H04B10/116

CPC分类号： H04B10/116 ,  H04B10/1149

摘要： A method and apparatus conduct an optical clock rate negotiation to support asymmetric clock rates for visible light communication (VLC) in a VLC device. A first frame that includes a receiver clock rate supported by a first VLC device is transmitted at a predetermined clock rate. A response frame that includes a receiver clock rate supported by a second VLC device is received from the second VLC device. A transmission clock rate of the first VLC device is selected based on the response frame from the second VLC device. Subsequent frames for data communication are transmitted to the second VLC device at the selected transmission clock rate of the first device. Alternatively, when conducting optical clock negotiation in the PHY layer, multiple clock rates are supported within a single frame.

摘要翻译： 一种方法和装置进行光时钟速率协商以支持VLC设备中可见光通信（VLC）的非对称时钟速率。 以预定的时钟速率发送包括由第一VLC设备支持的接收机时钟速率的第一帧。 从第二VLC设备接收包括由第二VLC设备支持的接收机时钟速率的响应帧。 基于来自第二VLC设备的响应帧来选择第一VLC设备的传输时钟速率。 用于数据通信的后续帧以所选择的第一设备的传输时钟速率发送到第二VLC设备。 或者，当在PHY层中进行光时钟协商时，在单个帧内支持多个时钟速率。

公开(公告)号：US08731406B2

公开(公告)日：2014-05-20

申请号：US12767678

申请日：2010-04-26

申请人： Sridhar Rajagopal ,  Farooq Khan

发明人： Sridhar Rajagopal ,  Farooq Khan

IPC分类号： H04B10/00 ,  G09G5/10

CPC分类号： H04B10/1149 ,  H04B10/116

摘要： For use in a visible light communication (VLC) network, a method for generating high resolution visibility frames for visibility or dimming support. The method includes determining a required visibility for the high resolution frames. The method also includes generating a pattern that meets the determined required visibility, the pattern having a first quantity of first low resolution frames and a second quantity of second low resolution frames. The method further includes transmitting the pattern to achieve the required high resolution frames.

摘要翻译： 为了在可见光通信（VLC）网络中使用，用于产生用于可见度或调光支持的高分辨率可见性帧的方法。 该方法包括确定高分辨率帧所需的可视性。 该方法还包括产生满足所确定的所需可见度的图案，该图案具有第一数量的第一低分辨率帧和第二数量的第二低分辨率帧。 该方法还包括发送图案以实现所需的高分辨率帧。

公开(公告)号：US08457560B2

公开(公告)日：2013-06-04

申请号：US12689156

申请日：2010-01-18

申请人： Sridhar Rajagopal ,  Kiran Bynam ,  Jianzhong Zhang

发明人： Sridhar Rajagopal ,  Kiran Bynam ,  Jianzhong Zhang

IPC分类号： H04B1/00

CPC分类号： H04W52/287 ,  H04W52/243 ,  H04W76/28 ,  H04W84/18

摘要： A device is adapted for use in a body area network capable of low power communications wherein a number of piconets can operate within close proximity. The device is configured to couple to a plurality of secondary devices in a piconet. The device uses an interference mitigation technique to enable the devices in the piconet to use the same frequency and same time as a number of adjacent piconets located in close proximity to the piconet. The interference mitigation technique is at least one of a low duty cycling operation; and a preamble sequence designed to operate under interference.

摘要翻译： 一种设备适用于能够进行低功率通信的身体区域网络，其中多个微微网可在紧邻内操作。 该设备被配置为耦合到微微网中的多个辅助设备。 该设备使用干扰减轻技术来使得微微网中的设备能够使用与位于微微网附近的多个相邻微微网相同的频率和相同的时间。 干扰减轻技术是低功率循环操作中的至少一种; 以及设计为在干扰下操作的前导码序列。

公开(公告)号：US20120093517A1

公开(公告)日：2012-04-19

申请号：US13053665

申请日：2011-03-22

申请人： Sridhar Rajagopal ,  Doyoung Kim ,  Taehan Bae ,  Jaeseung Son

发明人： Sridhar Rajagopal ,  Doyoung Kim ,  Taehan Bae ,  Jaeseung Son

IPC分类号： H04B10/00

CPC分类号： H04B10/116

摘要： A method and apparatus for supporting mobility of VLC (visible light communication) devices in a VLC network. A method includes transmitting data to a VLC device at a first cell. The method also includes searching for a response from the VLC device at a second cell that is adjacent to the first cell. The method further includes receiving the response from the VLC device at the second cell. The method also includes determining a mobility of the VLC device based on a change in communication from the first cell to the second cell.

摘要翻译： 一种在VLC网络中支持VLC（可见光通信）设备的移动性的方法和装置。 一种方法包括在第一小区向VLC设备发送数据。 该方法还包括在与第一小区相邻的第二小区处搜索来自VLC设备的响应。 该方法还包括在第二小区处接收来自VLC设备的响应。 该方法还包括基于从第一小区到第二小区的通信变化来确定VLC设备的移动性。