公开(公告)号：US20110199913A1

公开(公告)日：2011-08-18

申请号：US12906527

申请日：2010-10-18

申请人： Karthikeyan Sundaresan ,  Sampath Rangarajan

发明人： Karthikeyan Sundaresan ,  Sampath Rangarajan

IPC分类号： H04L12/26 ,  H04W40/00

CPC分类号： H04L12/1881 ,  H04B7/15592 ,  H04L12/189 ,  H04L47/10 ,  H04W72/005 ,  H04W72/082 ,  H04W84/047

摘要： Methods and systems for transmitting multicast data in a wireless relay network are described. A tradeoff between the benefits of relay cooperation and session multiplexing can be addressed through careful association of relay stations for resource allocation purposes to maximize the total system throughput. In addition, various complex and greedy scheduling procedures that are based on the distributed pet mutation model and the contiguous permutation model are also described.

摘要翻译： 描述了在无线中继网络中传输组播数据的方法和系统。 中继协议和会话多路复用的优点之间的折衷可以通过中继站的仔细关联来解决，用于资源分配目的，以最大限度地提高总系统吞吐量。 此外，还描述了基于分布式宠物突变模型和连续置换模型的各种复杂和贪心调度程序。

公开(公告)号：US07961683B2

公开(公告)日：2011-06-14

申请号：US10954973

申请日：2004-09-30

申请人： Suman Das ,  Anand Kagalkar ,  Sarit Mukherjee ,  Sureshbabu P. Nair ,  Priya Rajan ,  Ajay Rajkumar ,  Sampath Rangarajan ,  Michael D. Turner ,  Harish Viswanathan

发明人： Suman Das ,  Anand Kagalkar ,  Sarit Mukherjee ,  Sureshbabu P. Nair ,  Priya Rajan ,  Ajay Rajkumar ,  Sampath Rangarajan ,  Michael D. Turner ,  Harish Viswanathan

IPC分类号： H04W4/00

CPC分类号： H04W80/00 ,  H04L69/16 ,  H04L69/168 ,  H04W8/087

摘要： An active session mobility solution for point-to-point protocol (PPP) in accordance with the present invention provides fast and smooth handoff by reducing tunneling overhead on tunneling mechanisms, such as P-P tunneling from a serving Source (e.g., a PPP termination device) to a new serving Target (e.g., a PPP termination device). In the active session mobility solution of the present invention, PPP session can be migrated even if not all phases have been completed (e.g., LCP, PAP/CHAP completed but not IPCP and CCP). In such cases, the incomplete phases will be negotiated at the PPP of the Target PPP.

摘要翻译： 根据本发明的用于点对点协议（PPP）的主动会话移动性解决方案通过减少诸如来自服务源（例如，PPP终端设备）的PP隧道的隧道机制的隧道开销来提供快速和平滑的切换， 到新的服务目标（例如，PPP终端设备）。 在本发明的活动会话移动性解决方案中，即使不是所有阶段都已经完成（例如，LCP，PAP / CHAP完成但不是IPCP和CCP），PPP会话可以被迁移。 在这种情况下，不完整的阶段将以目标公私合作伙伴关系的PPP进行协商。

公开(公告)号：US20110113137A1

公开(公告)日：2011-05-12

申请号：US12941546

申请日：2010-11-08

申请人： Kishore Ramachandran ,  Narayan Prasad ,  Sampath Rangarajan

发明人： Kishore Ramachandran ,  Narayan Prasad ,  Sampath Rangarajan

IPC分类号： G06F15/16

CPC分类号： H04B7/0408 ,  H04B1/1027 ,  H04B7/063 ,  H04B7/0695 ,  H04B7/088

摘要： Methods and systems for rectifying deteriorated channel conditions on a communication link are described. In response to the detection of a link deterioration event, a cluster of beams about a currently utilized beam pair can be trialed to determine a suitable, alternate pair of beams on which to establish a communication link. In turn, in the case of a link blockage event, a set of beams having a relatively large azimuthal angle with respect to a currently utilized beam pair can be trialed to determine a suitable beam pair for further communication.

摘要翻译： 描述了用于整流通信链路恶化的信道条件的方法和系统。 响应于链路劣化事件的检测，可以尝试关于当前使用的波束对的一束波束，以确定在其上建立通信链路的合适的一对波束。 反过来，在链路阻塞事件的情况下，可以对相对于当前利用的波束对具有相对大的方位角的一组波束进行试验，以确定用于进一步通信的合适的波束对。

公开(公告)号：US20110105044A1

公开(公告)日：2011-05-05

申请号：US12940761

申请日：2010-11-05

申请人： Mohammad A. Khojastepour ,  Sampath Rangarajan

发明人： Mohammad A. Khojastepour ,  Sampath Rangarajan

IPC分类号： H04B17/00

CPC分类号： H04L27/28 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/0094 ,  H04L27/30

摘要： Methods and systems for reversing indexing signal option selections are disclosed. The signal options can be any of a variety of options that permit the establishment of a communication link, including modulation format, coding rate, precoding index and assigned subbands. The selected options can be represented as a vector and the index can be determined by employing a worth function for a particular selected vector element that is dependent on a selection occurrence count of the element and on an element position count of the element. In particular, the index can be the summation of worth function values for each selected element.

摘要翻译： 公开了用于反转索引信号选项选择的方法和系统。 信号选项可以是允许建立通信链路的各种选项中的任一种，包括调制格式，编码率，预编码索引和分配的子带。 所选择的选项可以被表示为向量，并且可以通过对依赖于元素的选择发生次数和元素的元素位置计数的特定选定向量元素采用值函数来确定索引。 特别地，索引可以是每个选定元素的值函数值的总和。

公开(公告)号：US20100009710A1

公开(公告)日：2010-01-14

申请号：US12388428

申请日：2009-02-18

申请人： Honghai Zhang ,  Luca Venturino ,  Narayan Prasad ,  Sampath Rangarajan

发明人： Honghai Zhang ,  Luca Venturino ,  Narayan Prasad ,  Sampath Rangarajan

IPC分类号： H04B7/00

CPC分类号： H04W52/241 ,  H04W52/281

摘要： Systems and methods are disclosed for transmission with a plurality of base stations (BSs) in a wireless cellular data network where one BS communicates with neighboring BSs by determining a binary or discrete new power level on each subchannel to determine a weighted sum modified rates of a BS and in-neighbor BSs; and resolving concurrent power update in each BS in a distributed manner.

摘要翻译： 公开了用于与无线蜂窝数据网络中的多个基站（BS）进行传输的系统和方法，其中一个BS通过确定每个子信道上的二进制或离散新功率电平来确定每个子信道的加权和修正率 BS和邻居BS; 并以分布式方式解决每个BS中的并发功率更新。

公开(公告)号：US20080242273A1

公开(公告)日：2008-10-02

申请号：US11694977

申请日：2007-03-31

申请人： Randeep S. Bhatia ,  Girija J. Narlikar ,  Sampath Rangarajan

发明人： Randeep S. Bhatia ,  Girija J. Narlikar ,  Sampath Rangarajan

IPC分类号： H04Q7/38

CPC分类号： H04L12/1859 ,  H04L12/189

摘要： The invention includes a method and apparatus for providing interactive services using unicast wireless networks and broadcast wireless networks. A method includes receiving content interaction information indicative of interactions by a user with content presented at a wireless user terminal, obtaining at least one service parameter, and providing a service using the content interaction information and the at least one service parameter, wherein the service is provided using one of the unicast wireless network or the broadcast wireless network. The content for which content interaction information is received is provided to the wireless user terminal using a broadcast wireless network and the content interaction information is received over a unicast wireless network. The service that is provided may include providing modified content over the broadcast wireless network, providing personalized content over the unicast wireless network, operating a proxy for a network-based service, and the like.

摘要翻译： 本发明包括一种使用单播无线网络和广播无线网络提供交互式服务的方法和装置。 一种方法包括接收表示用户与无线用户终端呈现的内容的交互的内容交互信息，获得至少一个服务参数，以及使用所述内容交互信息和所述至少一个服务参数提供服务，其中，所述服务是 使用单播无线网络或广播无线网络之一提供。 使用广播无线网络向无线用户终端提供接收到内容交互信息的内容，并且通过单播无线网络接收内容交互信息。 提供的服务可以包括通过广播无线网络提供经修改的内容，通过单播无线网络提供个性化内容，为基于网络的服务操作代理等。

公开(公告)号：US20070076661A1

公开(公告)日：2007-04-05

申请号：US11239319

申请日：2005-09-30

申请人： Chueng-Hsien Lin ,  Kishore Ramachandran ,  Sampath Rangarajan

发明人： Chueng-Hsien Lin ,  Kishore Ramachandran ,  Sampath Rangarajan

IPC分类号： H04Q7/00

CPC分类号： H04W36/30

摘要： In the method, communication is established between a mobile device and access points in a wireless local area network by first connecting to a first access point on a first channel. After the first connection is established, the method determines whether a second access point is available before disconnecting from the first connection. If a signal strength of the first connection drops below a signal strength threshold, the method second connects to the second access point on a second channel. The above-described method is an example of a make-before-break or soft handoff methodology.

摘要翻译： 在该方法中，通过首先连接到第一信道上的第一接入点，在移动设备与无线局域网中的接入点之间建立通信。 在建立第一连接之后，该方法在断开第一连接之前确定第二接入点是否可用。 如果第一连接的信号强度降低到信号强度阈值以下，则该方法在第二信道上连接到第二接入点。 上述方法是前置中断或软切换方法的示例。

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。

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.

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。