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1. 发明授权

US09270420B2 Data communication using 2D bar codes 有权
标题翻译：使用2D条形码进行数据通信
公开(公告)号：US09270420B2
公开(公告)日：2016-02-23
申请号：US12561015
申请日：2009-09-16
申请人： Farooq Khan , Jiann-An Tsai , Sridhar Rajagopal , Bill Semper , Zhouyue Pi , Ying Li
发明人： Farooq Khan , Jiann-An Tsai , Sridhar Rajagopal , Bill Semper , Zhouyue Pi , Ying Li
IPC分类号： H04L7/00 , H03K9/00 , H04L1/00 , H04L1/18
CPC分类号： H04L1/0075 , H04L1/0041 , H04L1/1812
摘要： A Two-Dimensional (2D) code receiver and transmitter, and methods for their operation in a 2D code communication system, are provided. The method for operating the 2D code receiver includes receiving a sequence of 2D codes from a 2D code transmitter having data encoded therein, wherein the 2D codes of the sequence are received in succession, and decoding the received a sequence of 2D codes into the data.
摘要翻译：提供二维（2D）码接收机和发射机及其在二维码通信系统中的操作方法。用于操作2D代码接收器的方法包括从具有其中编码的数据的2D代码发送器接收2D代码序列，其中序列的2D代码被连续地接收，并且将接收的2D代码序列解码为数据。

2. 发明授权

US08950933B2 Apparatus and method for channel aggregation and guard channel indication for visible light communication 有权
标题翻译：用于可见光通信的信道聚合和保护信道指示的装置和方法
公开(公告)号：US08950933B2
公开(公告)日：2015-02-10
申请号：US12895225
申请日：2010-09-30
申请人： Sridhar Rajagopal , Farooq Khan , Ying Li , Jaeseung Son
发明人： Sridhar Rajagopal , Farooq Khan , Ying Li , Jaeseung Son
IPC分类号： H04B10/00 , H04B10/116 , H04B10/114
CPC分类号： H04B10/116 , H04B10/1149
摘要： A method, apparatus, and a non-transitory computer readable storage medium for supporting visible light communication (VLC) exchanges bitmaps for capabilities field exchange in a media access control (MAC) layer during link establishment and association with other VLC-enabled devices. An aggregation bitmap is generated to indicate whether a visible light communication (VLC) transmitter of a first device uses at least one aggregated band that comprises multiple active frequency bands. The aggregation bitmap is transmitted in a capabilities information exchange (CIE) signal to a second device. A guard bitmap that identifies a set of guard frequency bands is also generated and transmitted in the CIE signal. Each guard frequency band indicates leakage transmission from the VLC transmitter.
摘要翻译：用于支持可见光通信（VLC）的方法，装置和非暂时计算机可读存储介质在与其他支持VLC的设备建立链接期间在媒体访问控制（MAC）层中交换位图以进行能力场交换。生成聚合位图以指示第一设备的可见光通信（VLC）发射机是否使用包括多个活动频带的至少一个聚合频带。聚合位图在能力信息交换（CIE）信号中被发送到第二设备。识别一组保护频带的保护位图也被生成并在CIE信号中发送。每个保护频带表示来自VLC发射机的泄漏传输。

3. 发明授权

US08620154B2 Methods and apparatus for fast and energy-efficient light recovery in a visible light communication (VLC) system 有权
标题翻译：在可见光通信（VLC）系统中用于快速和高能效的光回收的方法和装置
公开(公告)号：US08620154B2
公开(公告)日：2013-12-31
申请号：US12838240
申请日：2010-07-16
申请人： Ying Li , Sridhar Rajagopal
发明人： Ying Li , Sridhar Rajagopal
IPC分类号： H04B10/00 , H04B10/08
CPC分类号： H04W76/19 , H04W84/10 , Y02D70/00
摘要： A visible light communication (VLC) device is provided for use in a VLC system. The VLC device detect a trigger condition indicating a failure of a VLC link associated with first allocated resources used to communicate with a second VLC device. In response to the detection, the VLC device terminates on the first allocated resources transmission of data to the second VLC device and transmits a fast link recovery (FLR) signal using the first allocated resources. The VLC device receives a fast link recovery response (FLR RSP) signal indicating the second VLC device received the FLR signal and, in response, the VLC device resumes transmission of data to the second VLC device.
摘要翻译：提供可见光通信（VLC）设备用于VLC系统。 VLC设备检测指示与用于与第二VLC设备通信的第一分配资源相关联的VLC链路的故障的触发条件。响应于检测，VLC设备在第一分配的资源数据到第二VLC设备上终止并且使用第一分配的资源发送快速链路恢复（FLR）信号。 VLC设备接收指示第二VLC设备接收到FLR信号的快速链路恢复响应（FLR RSP）信号，并且作为响应，VLC设备恢复向第二VLC设备的数据传输。

4. 发明授权

US08554981B2 High availability virtual machine cluster 有权
公开(公告)号：US08554981B2
公开(公告)日：2013-10-08
申请号：US12017255
申请日：2008-01-21
申请人： Rene W. Schmidt , Sridhar Rajagopal
发明人： Rene W. Schmidt , Sridhar Rajagopal
IPC分类号： G06F12/00
CPC分类号： G06F11/203 , G06F9/455 , G06F9/45558 , G06F11/1084 , G06F11/2033 , G06F11/2035 , G06F11/2046 , G06F12/08 , G06F2009/45587
摘要： One embodiment of the present invention is a system including: (a) plural virtualization systems configured in a cluster; (b) storage accessible to each virtualization system of the cluster, wherein for each virtual machine operative in a virtualization system of the cluster, the storage maintains a representation of virtual machine state that includes at least a description of a hardware system virtualized and an image of virtualized memory state for the virtual machine; and (c) a failover system that, responsive to an interruption of, or on, a particular one of the virtualization systems, transitions at least one affected virtual machine to another virtualization system of the cluster and resumes computations of the transitioned virtual machine based on state encoded by a corresponding one of the virtual machine states represented in the storage.

5. 发明授权

US08549364B2 Failure detection and recovery of host computers in a cluster 有权
标题翻译：群集中主机的故障检测和恢复
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。

6. 发明授权

US08204460B2 Method and system for precise transmit power adjustment in wireless communication systems 有权
标题翻译：无线通信系统中精确发射功率调整的方法和系统
公开(公告)号：US08204460B2
公开(公告)日：2012-06-19
申请号：US11835924
申请日：2007-08-08
申请人： Sridhar Rajagopal , Brian Chadwick Joseph
发明人： Sridhar Rajagopal , Brian Chadwick Joseph
IPC分类号： H01Q11/12 , H04B1/04
CPC分类号： H04W52/367 , H03G3/3042 , H04B2001/0416 , H04W52/36 , H04W52/362 , H04W52/52
摘要： A method for precise transmit power adjustment in a wide personal area network (WPAN) is provided that includes coarse adjusting a power level of the radio signal by adjusting a gain setting of an amplifier that is used to power the radio signal, and fine adjusting the power level of the radio signal by adjusting a voltage level of an information signal that is provided to the amplifier so that the power level of the radio signal approaches a maximum allowable power level.
摘要翻译：提供了一种在广域网（WPAN）中进行精确发射功率调整的方法，包括通过调整用于为无线电信号供电的放大器的增益设置来粗略地调整无线电信号的功率电平，并且微调通过调整提供给放大器的信息信号的电压电平使得无线电信号的功率电平接近最大允许功率电平，来产生无线电信号的功率电平。

7. 发明授权

US08081691B2 Detection of interferers using divergence of signal quality estimates 有权
标题翻译：使用信号质量估计的发散检测干扰源
公开(公告)号：US08081691B2
公开(公告)日：2011-12-20
申请号：US12014035
申请日：2008-01-14
申请人： Brian Chadwick Joseph , Sridhar Rajagopal , Syed Nadeem Ahmed , Yaming Zhang
发明人： Brian Chadwick Joseph , Sridhar Rajagopal , Syed Nadeem Ahmed , Yaming Zhang
IPC分类号： H04K1/10
CPC分类号： H04L5/0007 , H04B1/719
摘要： A method, system, and computer-readable medium for detecting an interferer in a wireless communication system are provided. The method includes receiving a signal having P tones, each of the P tones being associated with a frequency, determining a first signal quality of each of the P tones, determining a second signal quality of each of the P tones, and detecting the interferer that occupies the same frequency as one of the P tones based on the respective first signal quality and the respective second signal quality. The first signal quality and second signal quality behave differently when the interferer is present. The detecting the interferer includes determining a discrepancy in the behavior of the first signal quality and the second signal quality.
摘要翻译：提供了一种用于检测无线通信系统中的干扰源的方法，系统和计算机可读介质。该方法包括接收具有P个音调的信号，每个P音调与频率相关联，确定每个P音调的第一信号质量，确定每个P音调的第二信号质量，以及检测该干扰信号基于相应的第一信号质量和相应的第二信号质量，它们占据与P音调之一相同的频率。当干扰源存在时，第一信号质量和第二信号质量的行为不同。检测干扰源包括确定第一信号质量和第二信号质量的行为的差异。

8. 发明申请

US20110164881A1 OPTICAL CLOCK RATE NEGOTIATION FOR SUPPORTING ASYMMETRIC CLOCK RATES FOR VISIBLE LIGHT COMMUNICATION 有权
标题翻译：用于支持可见光通信的不对称时钟频率的光时钟速率协商
公开(公告)号：US20110164881A1
公开(公告)日：2011-07-07
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
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。

9. 发明申请

US20100211829A1 FAILURE DETECTION AND RECOVERY OF HOST COMPUTERS IN A CLUSTER 有权
标题翻译：主机计算机故障检测和恢复
公开(公告)号：US20100211829A1
公开(公告)日：2010-08-19
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： G06F11/07
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。

10. 发明申请

US20060211377A1 Detection and mitigation of interference and jammers in an OFDM system 有权
标题翻译：检测和减轻OFDM系统中的干扰和干扰
公开(公告)号：US20060211377A1
公开(公告)日：2006-09-21
申请号：US11226654
申请日：2005-09-14
申请人： Matthew Shoemake , Sridhar Rajagopal , John Terry
发明人： Matthew Shoemake , Sridhar Rajagopal , John Terry
IPC分类号： H04B17/00
CPC分类号： H04B17/345
摘要： The present invention provides a method and apparatus for detecting interference in a wireless communications system. The invention compares the receiver FFT output of a received signal against known sequences such as the packet synchronization sequence, frame synchronization sequence, and channel estimation sequence. By comparing the reference signal to the known sequences, the invention estimates the instantaneous signal to noise ratio (SNR) for each tone of a wireless transmission. To improve the SNR estimate, the invention computes a weighted average across multiple OFDM symbols. The invention looks for significant increases (spikes) in the SNR as a way of distinguishing interfering signals from noise. The invention can store separate SNR estimates for each transmitter in a wireless network. One embodiment of the invention uses Viterbi branch metrics in conjunction with the estimated SNR to determine the presence of an interfering signal. If interference is detected the invention feeds the inverse of the SNR estimate into the Viterbi decoder or declares and erasure for that symbol.
摘要翻译：本发明提供一种用于检测无线通信系统中的干扰的方法和装置。本发明将接收信号的接收机FFT输出与诸如分组同步序列，帧同步序列和信道估计序列的已知序列进行比较。通过将参考信号与已知序列进行比较，本发明估计无线传输的每个音调的瞬时信噪比（SNR）。为了提高SNR估计，本发明计算跨多个OFDM符号的加权平均。本发明寻找SNR中的显着增加（尖峰）作为区分干扰信号和噪声的一种方式。本发明可以在无线网络中为每个发射机存储单独的SNR估计。本发明的一个实施例使用维特比分支度量结合估计的SNR来确定干扰信号的存在。如果检测到干扰，本发明将SNR估计的逆向馈送到维特比解码器中，或者声明并擦除该符号。

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