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51. 发明授权

US06510439B1 Method and system for consistent update and retrieval of document in a WWW server 有权
标题翻译：在WWW服务器中一致地更新和检索文档的方法和系统
公开(公告)号：US06510439B1
公开(公告)日：2003-01-21
申请号：US09370340
申请日：1999-08-06
申请人： Sampath Rangarajan , Shalini Yajnik
发明人： Sampath Rangarajan , Shalini Yajnik
IPC分类号： G06F1730
CPC分类号： G06F17/30893 , Y10S707/99945 , Y10S707/99952
摘要： A system for providing coherent access to different versions of a group of documents stored in a file system and retrievable over the Internet from an HTTP server includes a state management server which stores registration data indicating the file paths of the documents in each version of the group and a set of index paths used by clients to reference documents in the group. State information identifying the version of said group previously accessed by a client is stored in a cookie which is associated with the domain of the state management server and the path of the group. A client requests a document from the group by issuing a request to an HTTP server including the index path of the desired document. The request and associated cookie, which is automatically transmitted by the client Internet software, is forwarded to the state management server. The state information stored in the cookie is extracted and used to determine which version of the group of documents should be accessed. The index path is then mapped to the file path for the appropriate version of the requested document and the data information is updated to reflect the present access. The mapped file path and cookie are then returned to the HTTP server.
摘要翻译：用于提供对存储在文件系统中并可通过因特网从HTTP服务器检索的一组文档的不同版本的一致访问的系统包括状态管理服务器，其存储指示文档的每个版本中的文件路径的注册数据以及客户端使用的一组索引路径来引用组中的文档。识别由客户端先前访问的所述组的版本的状态信息被存储在与状态管理服务器的域和组的路径相关联的cookie中。客户端通过向包括所需文档的索引路径的HTTP服务器发出请求来请求组中的文档。由客户端Internet软件自动发送的请求和关联的cookie被转发到状态管理服务器。提取存储在cookie中的状态信息，并用于确定哪个版本的文档组应被访问。然后将索引路径映射到文件路径以获取所请求文档的适当版本，并更新数据信息以反映当前访问。映射的文件路径和cookie然后返回到HTTP服务器。

52. 发明授权

US06314465B1 Method and apparatus for load sharing on a wide area network 有权
公开(公告)号：US06314465B1
公开(公告)日：2001-11-06
申请号：US09266339
申请日：1999-03-11
申请人： Sanjoy Paul , Sampath Rangarajan
发明人： Sanjoy Paul , Sampath Rangarajan
IPC分类号： G06F1300
CPC分类号： H04L67/1008 , H04L67/1002 , H04L67/101 , H04L67/1012 , H04L67/1034
摘要： Client's (106-1-106-N, 107-1-107-M) on local area networks (102, 103) making requests to hot sites, which are connected on a wide area network (100) such as the Internet, are redirected through one of a possible plurality of different redirectors (101, 103) to one of a possible plurality of caching servers (S1, S2, S3), which each have responsibility for mapping one or more of the hot sites. Each request is probabilistically directed by one of the redirectors to one of the caching servers that map the requested hot site in accordance with weights that are determined for that redirector-hot site pair so as to minimize the average delay that all client requests across the network will encounter in making requests to all the cached hot sites. In order to determine the weights with which each redirector will redirect requests to the hot sites to the caching servers, statistics of access rates to each hot site are dynamically determined by each redirector in the network from the traffic flow and reported to a central management station (CMS) (115). Network delay is similarly measured by each redirector and reported to the CMS, and server delay is computed using a queuing model of each server. Using these parameters as inputs, a non-linear programming optimization problem is solved as a network flow problem in order to determine the weights for each redirector that will minimize the average delay. As the access rate statistics, as well as the network delay and server delay, dynamically change, the CMS, using the network flow algorithm, recalculates the weights and forwards them back to each redirector. In other embodiments, the redirector-logical item pair for which the redirector probabilistically directs client requests may be other than a hot site identity. For example, the logical items can be groups of clients or groups of documents, and the servers to which requests are forwarded can be web servers or caching servers.

53. 发明授权

US06161193A Methods and apparatus for process replication/recovery in a distributed system 失效
标题翻译：分布式系统中进程复制/恢复的方法和装置
公开(公告)号：US06161193A
公开(公告)日：2000-12-12
申请号：US044054
申请日：1998-03-18
申请人： Sachin Garg , Yennun Huang , Sampath Rangarajan
发明人： Sachin Garg , Yennun Huang , Sampath Rangarajan
IPC分类号： G06F11/14 , G06F11/20 , G06F11/00
CPC分类号： G06F11/203 , G06F11/1492 , G06F11/2035
摘要： A distributed computing system includes a number of computers, workstations or other computing machines interconnected by a network. A non-interactive process arriving in a host machine of the system is migrated for execution to at least two remote machines. For example, first and second executions of the process may be started on respective first and second remote machines. One of the first and second executions of the process is then used to provide an on-demand checkpoint for the other execution of the process in the event the other execution is terminated, such that an additional execution of the process can be started from the on-demand checkpoint. This on-demand checkpointing is augmented with periodic checkpointing performed on at least one of the multiple executions of the process. The period of the periodic checkpointing for a given execution of the process may be fixed without regard to the status of the on-demand checkpointing for that execution, or alternatively may be reset each time an on-demand checkpoint is taken for that execution.
摘要翻译：分布式计算系统包括由网络互连的多个计算机，工作站或其他计算机。到达系统主机的非交互过程被迁移以执行至少两台远程机器。例如，可以在相应的第一和第二远程机器上开始进程的第一和第二执行。然后，该过程的第一次和第二次执行之一用于在其他执行终止的情况下为进程的另一个执行提供按需检查点，使得可以从开始执行进程的附加执行 -demand检查点。在对进程的多个执行中的至少一个执行的周期性检查点处理上增加了该按需检查点。对于给定执行过程的周期性检查点的周期可以是固定的，而不考虑该执行的按需检查点的状态，或者可以在每次对该执行采取按需检查点时被重置。

54. 发明授权

US09161205B2 Route optimization at a packet data switch node 有权
标题翻译：在分组数据交换节点上进行路由优化
公开(公告)号：US09161205B2
公开(公告)日：2015-10-13
申请号：US11354212
申请日：2006-02-14
申请人： Peter Bosch , Paul Anthony Polakos , Ajay Rajkumar , Sampath Rangarajan
发明人： Peter Bosch , Paul Anthony Polakos , Ajay Rajkumar , Sampath Rangarajan
IPC分类号： H04W8/08 , H04L12/701 , H04W8/26 , H04W40/00 , H04W80/04 , H04W92/02
CPC分类号： H04W8/082 , H04L45/00 , H04W8/085 , H04W8/26 , H04W40/00 , H04W80/04 , H04W92/02
摘要： The present invention provides a method of route optimization. The method may include obtaining a packet associated with a first address associated, by a home agent, with a first mobile unit and routing the packet to a second address associated with a second mobile unit along a forward link of a communication path that bypasses the home agent.
摘要翻译：本发明提供一种路由优化的方法。该方法可以包括获得与归属代理相关联的与第一移动单元相关联的第一地址的分组，并且沿着绕过家庭的通信路径的前向链路将分组路由到与第二移动单元相关联的第二地址代理商

55. 发明授权

US09137788B2 Multiple-input multiple-output wireless communications with full duplex radios 有权
标题翻译：具有全双工无线电的多输入多输出无线通信
公开(公告)号：US09137788B2
公开(公告)日：2015-09-15
申请号：US13588466
申请日：2012-08-17
申请人： Mohammad A. Khojastepour , Sanaz Barghi , Karthikeyan Sundaresan , Sampath Rangarajan
发明人： Mohammad A. Khojastepour , Sanaz Barghi , Karthikeyan Sundaresan , Sampath Rangarajan
IPC分类号： H04W72/04 , H04B7/08 , H04B7/06 , H04L5/00 , H04L5/14
CPC分类号： H04W72/0413 , H04B7/063 , H04B7/0691 , H04B7/0802 , H04B7/0874 , H04L5/0025 , H04L5/0037 , H04L5/0062 , H04L5/14 , H04W72/042
摘要： An apparatus used in a full duplex multiple-input multiple-output (MIMO) wireless communications system is disclosed. In an aspect, the apparatus includes a plurality of antennas, each of which is connected to a combination of at least a TX (transmit) RF (radio frequency) chain and an RX (receive) RF chain. The plurality of antennas are split into one or more transmit antennas and one or more receive antennas, and the apparatus communicates with another apparatus. Other apparatuses and some methods for wireless communications also are disclosed.
摘要翻译：公开了一种在全双工多输入多输出（MIMO）无线通信系统中使用的装置。在一方面，该装置包括多个天线，每个天线连接至少一个TX（发射）RF（射频）链和RX（接收）RF链的组合。多个天线分为一个或多个发射天线和一个或多个接收天线，并且该装置与另一装置通信。还公开了用于无线通信的其它装置和一些方法。

56. 发明授权

US09100946B2 Scheduling information of overlapping co-scheduled users in an OFDMA-MU-MIMO system 有权
标题翻译：在OFDMA-MU-MIMO系统中调度重叠的共同调度用户的信息
公开(公告)号：US09100946B2
公开(公告)日：2015-08-04
申请号：US13550099
申请日：2012-07-16
申请人： Narayan Prasad , Mohammad Ali Khojastepour , Meilong Jiang , Xiaodong Wang , Sampath Rangarajan
发明人： Narayan Prasad , Mohammad Ali Khojastepour , Meilong Jiang , Xiaodong Wang , Sampath Rangarajan
IPC分类号： H04W72/08 , H04W72/04 , H04L1/20 , H04W28/04 , H04W72/12 , H04L5/00 , H04B7/04 , H04L25/02 , H04L1/00 , H04W8/26 , H04B7/06
CPC分类号： H04W72/04 , H04B7/0452 , H04B7/0639 , H04B7/066 , H04L1/0003 , H04L1/0009 , H04L1/0025 , H04L1/0026 , H04L1/20 , H04L5/0007 , H04L25/0208 , H04W8/26 , H04W28/04 , H04W52/346 , H04W72/0446 , H04W72/12 , H04W72/1231 , H04W72/1289
摘要： A user equipment (UE) used in a multi-user (MU)-multiple input multiple output (MIMO) orthogonal frequency division multiple access (OFDMA) system is disclosed. The UE includes a receiving unit to receive from a base station an indication of an estimate of or an upper-bound on the total number of MU-MIMO user equipments (|S|) that are scheduled on a sub-band by the base station, wherein the sub-band includes one or more resource units, a calculation unit to calculate channel quality based on the indication of the estimate of or the upper-bound on the total number of MU-MIMO user equipments, and a transmission unit to transmit to the base station an indication of the channel quality. Other methods and apparatuses also are disclosed.
摘要翻译：公开了在多用户（MU） - 多输入多输出（MIMO）正交频分多址（OFDMA）系统中使用的用户设备（UE）。 UE包括：接收单元，用于从基站接收由基站在子带上调度的MU-MIMO用户设备（| S |）的总数的估计或上限的指示; 其特征在于，所述子带包括一个以上的资源单元，基于MU-MIMO用户设备的总数的估计或上限的指示来计算信道质量的计算单元，以及发送单元向基站提供信道质量的指示。还公开了其它方法和装置。

57. 发明授权

US08917648B2 Precoder design for physical layer multicasting 有权
标题翻译：物理层组播的预编码器设计
公开(公告)号：US08917648B2
公开(公告)日：2014-12-23
申请号：US13621293
申请日：2012-09-17
申请人： Narayan Prasad , Hao Zhu , Sampath Rangarajan
发明人： Narayan Prasad , Hao Zhu , Sampath Rangarajan
IPC分类号： H04W4/06
CPC分类号： H04W4/06
摘要： A method for a transmit precoder for multicast communication over a downlink in a wireless network, including: initializing a transmit precoder, a channel estimate for each user in the wireless network; updating for each user a receive filter and a slack matrix; updating the transmit precoder by solving a second order cone routine solvable in closed form; determining if a predetermined convergence is met; and outputting the updated transmit precoder responsive to the convergence criteria.
摘要翻译：一种用于无线网络中的下行链路上的组播通信的发送预编码器的方法，包括：初始化发送预编码器，针对无线网络中的每个用户的信道估计; 为每个用户更新接收过滤器和松弛矩阵; 通过解决封闭形式可解的二阶锥体程序来更新传输预编码器; 确定是否满足预定的会聚; 以及响应于所述收敛标准输出所述更新的发送预编码器。

58. 发明授权

US08837332B2 Method for a canceling self interference signal using passive noise cancellation for full-duplex simultaneous (in time) and overlapping (in space) wireless transmission and reception on the same frequency band 有权
标题翻译：使用无源噪声消除来消除自干扰信号的方法，用于在同一频带上同时（在时间上）和重叠（在空间中）无线发射和接收全双工
公开(公告)号：US08837332B2
公开(公告)日：2014-09-16
申请号：US13324998
申请日：2011-12-13
申请人： Mohammad A. Khojastepour , Karthikeyan Sundaresan , Sampath Rangarajan
发明人： Mohammad A. Khojastepour , Karthikeyan Sundaresan , Sampath Rangarajan
IPC分类号： H04J1/12 , H04J3/10 , H04B1/00 , H04B15/00 , H04B1/10 , H01Q3/26 , H01Q21/00 , H04B7/10 , H04B7/04
CPC分类号： H01Q3/2605 , H01Q21/00 , H04B1/525 , H04B7/0413 , H04B7/10
摘要： A method for full duplex communication that includes creating a canceling self interference signal using a passive noise cancellation, and attaining full-duplex simultaneous in time and overlapping in space wireless transmission and reception on same frequency band responsive to the step of creating a canceling self interference signal.
摘要翻译：一种用于全双工通信的方法，包括使用无源噪声消除产生消除自身干扰信号，并且响应于创建消除自身干扰的步骤，在同一频带上在时间上同时实现全双工同时无线发送和接收信号。

59. 发明授权

US08767888B2 Efficient square-root free 2 symbol max-log receiver 有权
标题翻译：高效的平方根自由2符号最大对数接收器
公开(公告)号：US08767888B2
公开(公告)日：2014-07-01
申请号：US13433873
申请日：2012-03-29
申请人： Narayan Prasad , Neda Cvijetic , Sampath Rangarajan , Ting Wang
发明人： Narayan Prasad , Neda Cvijetic , Sampath Rangarajan , Ting Wang
IPC分类号： H04L27/06 , H04L25/02 , H04L25/06 , H04L25/03
CPC分类号： H04L25/0246 , H04L25/03171 , H04L25/067
摘要： The present invention employs a look up table based implementation for the metric computations which eliminate redundancy and substantially reduce the number of multiplications. Moreover, inventive method exploits the fact that the un-normalized constellation symbols are complex integers so that the product of a real-number and an un-normalized constellation symbol can be implemented by only additions. The inventive method also enables a greater efficiency for whitening colored noise prior to demodulation, one of which involves no square-root operation. The invention results in less complexity, faster operation, lower power consumption, without sacrificing performance.
摘要翻译：本发明使用用于度量计算的查找表实现，其消除冗余并且显着减少乘法次数。此外，本发明的方法利用了未归一化的星座符号是复数整数的事实，使得实数和未归一化的星座符号的乘积可以仅通过添加来实现。本发明的方法还使得能够在解调之前增加有色噪声的效率，其中之一不涉及平方根操作。本发明导致更少的复杂性，更快的操作，更低的功耗，而不会牺牲性能。

60. 发明授权

US08724573B2 Resource allocation in 4G MIMO cellular uplinks 有权
标题翻译： 4G MIMO蜂窝上行链路中的资源分配
公开(公告)号：US08724573B2
公开(公告)日：2014-05-13
申请号：US13343398
申请日：2012-01-04
申请人： Narayan Prasad , Honghai Zhang , Meilong Jiang , Guosen Yue , Sampath Rangarajan
发明人： Narayan Prasad , Honghai Zhang , Meilong Jiang , Guosen Yue , Sampath Rangarajan
IPC分类号： H04W72/04 , H04W72/06
CPC分类号： H04W72/04 , H04B7/0404 , H04W72/042 , H04W72/06 , H04W72/1257
摘要： A method of uplink resource allocation is disclosed. The method includes computing a set of utilities for each of a finite set of transmission modes with a processor across a plurality of user devices, each having multiple transmit antennas, and iteratively allocating uplink resource blocks (RBs) and transmission modes to the plurality of user devices until all users have been allocated or no allocation is found, by selecting a mode that has a highest incremental utility sum for each user across one or more RBs, determining which user has the highest incremental utility sum, allocating the mode and RBs associated with the highest incremental utility sum to the user, and removing the allocated user from consideration. Other apparatuses, systems, and methods also are disclosed.
摘要翻译：公开了一种上行链路资源分配的方法。该方法包括：通过跨多个用户设备的处理器计算一组有用传输模式的实用程序，每个用户设备具有多个发射天线，并向多个用户迭代地分配上行链路资源块（RB）和传输模式设备，直到所有用户已经被分配或没有找到分配，通过选择对于每个用户跨越一个或多个RB具有最高增量效用总和的模式，确定哪个用户具有最高的增量效用总和，分配与对用户的最大增量效用总和，并从分配中删除分配的用户。还公开了其他装置，系统和方法。

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