公开(公告)号：US07715382B2

公开(公告)日：2010-05-11

申请号：US11147642

申请日：2005-06-08

申请人： Tirunell V. Lakshman ,  Thyagarajan Nandagopal ,  Ramachandran Ramjee ,  Krishan K. Sabnani ,  Thomas Y. Woo

发明人： Tirunell V. Lakshman ,  Thyagarajan Nandagopal ,  Ramachandran Ramjee ,  Krishan K. Sabnani ,  Thomas Y. Woo

IPC分类号： H04L12/56

CPC分类号： H04L45/28 ,  H04L45/04 ,  H04L45/22 ,  H04L45/60

摘要： The SoftRouter architecture separates the implementation of control plane functions from packet forwarding functions. In this architecture, all control plane functions are implemented on general purpose servers called the control elements (CEs) that may be multiple hops away from the forwarding elements (FEs). A network element (NE) or a router is formed using dynamic binding between the CEs and the FEs. The flexibility of the SoftRouter architecture over conventional routers with collocated and tightly integrated control and forwarding functions results in increased reliability, increased scalability, increased security, ease of adding new functionality, and decreased cost.

摘要翻译： SoftRouter架构将控制平面功能的实现与数据包转发功能分开。 在这种架构中，所有控制平面功能都在通用服务器上实现，称为可能与转发元件（FE）之间多跳的控制元件（CE）。 使用CE和FE之间的动态绑定形成网元（NE）或路由器。 SoftRouter架构与具有并置且紧密集成的控制和转发功能的传统路由器的灵活性相结合，可提高可靠性，增加可扩展性，增加安全性，增加新功能以及降低成本。

公开(公告)号：US20090124205A1

公开(公告)日：2009-05-14

申请号：US11939217

申请日：2007-11-13

申请人： Bernard D. Aboba ,  Paramvir Bahl ,  Gopala S. Narlanka ,  Jitendra D. Padhye ,  Bozidar Radunovic ,  Ramachandran Ramjee ,  Kun Tan ,  Miguel Oom Temudo de Castro

发明人： Bernard D. Aboba ,  Paramvir Bahl ,  Gopala S. Narlanka ,  Jitendra D. Padhye ,  Bozidar Radunovic ,  Ramachandran Ramjee ,  Kun Tan ,  Miguel Oom Temudo de Castro

IPC分类号： H04B17/00

CPC分类号： H04B17/382 ,  H04B17/345

摘要： A communication device cognitively monitors interference signals across a communication band so that adaptations for physical and medium access control (MAC) of data packet transmissions are appropriate for a particular interference signal. Characteristics of an interference signal of interest (e.g., bandwidth, power and/or duration relative to an average data packet transmitted over a communication channel of the communication device) are sensed for an appropriate adaptation (e.g., forward error correction, modulation technique, back off, request to send/clear to send protocol, etc.). Patterns for known types of interference sources can be compared so that when recognized an associated adaptation can be used.

摘要翻译： 通信设备认知地监测跨通信频带的干扰信号，使得数据分组传输的物理和媒体接入控制（MAC）的适配适用于特定的干扰信号。 感兴趣的干扰信号的特征（例如，相对于在通信设备的通信信道上传输的平均数据分组的带宽，功率和/或持续时间）被适当的适配（例如，前向纠错，调制技术，后向 关闭，请求发送/清除发送协议等）。 可以比较已知类型的干扰源的模式，使得当识别出可以使用相关联的适配时。

公开(公告)号：US20080159299A1

公开(公告)日：2008-07-03

申请号：US11647274

申请日：2006-12-29

申请人： Tian Bu ,  Li Li ,  Ramachandran Ramjee

发明人： Tian Bu ,  Li Li ,  Ramachandran Ramjee

IPC分类号： H04L12/56

CPC分类号： H04L63/0823 ,  H04L63/10 ,  H04L63/101 ,  H04L63/123

摘要： Novel, Internet-related architectures, methods and devices are proposed that are based on a fundamentally different philosophy: hosts (e.g., source and destination nodes) are given the ability to specify their access control policies to the network they are a part of, and the network enforces these policies. The architecture proposed is mobility friendly to the ever increasing number of mobile hosts and is scalable as well.

摘要翻译： 提出了基于互联网相关的架构，方法和设备，其基于根本不同的哲学：主机（例如，源和目的地节点）被赋予能够将它们的访问控制策略指定给它们作为其一部分的网络，以及 网络执行这些策略。 所提出的架构对于越来越多的移动主机的移动性是友好的，并且也是可扩展的。

公开(公告)号：US07317686B2

公开(公告)日：2008-01-08

申请号：US10242051

申请日：2002-09-12

申请人： Sneha Kasera ,  Ramachandran Ramjee ,  Danny Raz ,  Yuval Shavitt ,  Prasun Sinha

发明人： Sneha Kasera ,  Ramachandran Ramjee ,  Danny Raz ,  Yuval Shavitt ,  Prasun Sinha

IPC分类号： H04J1/16

CPC分类号： H04L47/10 ,  H04L47/20

摘要： A network node computes a fair share data rate for the sharing of a shared communication channel in a local area network. The network node determines the required information for computing the fair share by snooping the network, by receiving the required information from other network nodes, or a combination of the two techniques. Alternatively, instead of computing the fair share data rate, the network node may receive the fair share data rate which was computed by another network node. The fair share data rate is enforced by the network node in a network protocol stack layer above the media access control layer. In one embodiment, the network protocol stack layer above the media access control layer is the link layer.

摘要翻译： 网络节点计算用于在局域网中共享共享通信信道的公平共享数据速率。 网络节点通过窥探网络，通过从其他网络节点接收所需信息或两种技术的组合来确定计算公平共享所需的信息。 或者，代替计算公平共享数据速率，网络节点可以接收由另一个网络节点计算的公平共享数据速率。 公平共享数据速率由媒体访问控制层上方的网络协议栈层中的网络节点实施。 在一个实施例中，媒体访问控制层之上的网络协议栈层是链路层。

公开(公告)号：US07120453B2

公开(公告)日：2006-10-10

申请号：US09837809

申请日：2001-04-18

申请人： Thomas F. La Porta ,  Li Li ,  Ramachandran Ramjee

发明人： Thomas F. La Porta ,  Li Li ,  Ramachandran Ramjee

IPC分类号： H04Q7/20

CPC分类号： H04W68/00 ,  Y02D70/1224 ,  Y02D70/142 ,  Y02D70/23

摘要： Base stations on an Internet protocol (IP) network define a number of paging areas. An IP mobile host assumes one of (i) an active state, wherein the host informs other network nodes of a change in its point of attachment from one base station to another, and (ii) a standby state wherein the host informs other nodes only when a new point of attachment is a base station of a different paging area from a last point of attachment, thus conserving power at the mobile host. When data on the network is addressed to a standby mobile host, a page request is directed to a base station(s) in the host's current paging area for transmission. The host enters the active state and transmits a page response which is received by a base station in the current paging area, and network routing information for the host is updated accordingly.

公开(公告)号：US06654359B1

公开(公告)日：2003-11-25

申请号：US09210072

申请日：1998-12-11

申请人： Thomas F. La Porta ,  Kazutaka Murakami ,  Ramachandran Ramjee ,  Sandra R. Thuel ,  Kannan Varadhan

发明人： Thomas F. La Porta ,  Kazutaka Murakami ,  Ramachandran Ramjee ,  Sandra R. Thuel ,  Kannan Varadhan

IPC分类号： H04J1228

CPC分类号： H04L61/2015 ,  H04L29/12216 ,  H04L29/12301 ,  H04L29/12311 ,  H04L29/12801 ,  H04L61/2076 ,  H04L61/2084 ,  H04L61/6004 ,  H04W40/248 ,  H04W40/28 ,  H04W40/36 ,  H04W80/04 ,  H04W88/005

摘要： Domains are defined to incorporate a subnet including a plurality of base stations and routers. Base stations are used by mobile devices to attach to the wired portion of a packet-based network, such as the Internet, and exchange packets thereover with a correspondent node. Local mobility between domain base stations is provided by including and updating routing table entries at domain routers and base stations for forwarding packets having a mobile device's address as a destination address to the mobile device. Packets are delivered to the mobile device regardless of the domain base station to which the mobile device is attached. When a mobile device is attached to a base station included within a foreign domain, a care-of address is assigned, and packets are tunneled for delivery of packets to the mobile device. Only one care-of address is required per mobile device per foreign domain. Routing table entries used for packet delivery are updated on a purely local subnet basis within domains, whether home domain or foreign domain, making handoffs between base stations substantially transparent to the home agent and the correspondent node.

摘要翻译： 域被定义为并入包括多个基站和路由器的子网。 移动设备使用基站来附加到诸如因特网的基于分组的网络的有线部分，并且与对应节点交换分组。 通过在域路由器和基站处包括和更新路由表条目来提供域基站之间的本地移动，用于将具有移动设备地址的分组转发到移动设备。 无论移动设备连接到的域基站如何，都将数据包传送到移动设备。 当移动设备附接到包含在外部域中的基站时，分配转交地址，并且分组被隧道传送到移动设备的分组。 每个移动设备每个外国域只需要一个转交地址。 用于分组传递的路由表条目在域内纯属于本地子网进行更新，无论是归属域还是外部域，使基站之间的切换对归属代理和通信节点基本上是透明的。

公开(公告)号：US6081715A

公开(公告)日：2000-06-27

申请号：US819929

申请日：1997-03-18

申请人： Thomas F. La Porta ,  Ramachandran Ramjee ,  Malathi Veeraraghavan

发明人： Thomas F. La Porta ,  Ramachandran Ramjee ,  Malathi Veeraraghavan

IPC分类号： H04M3/00 ,  H04L12/56 ,  H04Q11/04 ,  H04W8/04 ,  H04W8/08 ,  H04W36/12 ,  H04Q7/20 ,  H04Q7/22

CPC分类号： H04W8/04 ,  H04Q11/0478 ,  H04L2012/5629 ,  H04W36/12 ,  H04W8/08

摘要： A system for distributed control in wireless cellular and personal communication systems includes separate servers for performing call control and connection control functions, thereby obviating the need for a mobile switching or other switch to be anchored for the duration of a call. During a registration procedure, visiting location servers track only roaming mobiles, rather than tracking both roaming mobiles as well as mobiles located in their home network. Direct signalling links between servers and base stations, or other servers, located in different networks allow roaming mobiles to contact their home networks for service at all times, thereby obviating the need for passing signalling information for mobiles when they are not involved in a call. The use of multicast signalling with asynchronous transfer mode switches, permits specified channel control functions to take place concurrently in channel servers associated with base station and switches that form a segment of the route for a call. Similarly, specified call control functions are performed concurrently with mobile location functions, thereby decreasing the delays in setting up a call.

摘要翻译： 用于无线蜂窝和个人通信系统中的分布式控制的系统包括用于执行呼叫控制和连接控制功能的单独的服务器，从而避免了在呼叫期间锚定移动交换机或其他交换机的需要。 在注册过程中，访问位置服务器只跟踪漫游手机，而不是跟踪漫游手机以及位于其家庭网络中的手机。 位于不同网络中的服务器和基站或其他服务器之间的直接信令链路允许漫游移动设备随时联系他们的家庭网络进行服务，从而避免了在移动台不参与呼叫时传递信令信息的需要。 使用具有异步传输模式交换机的多播信令允许指定的信道控制功能同时发生在与基站和交换机相关联的信道服务器中，所述基站和交换机形成用于呼叫的路由的一部分。 类似地，指定的呼叫控制功能与移动定位功能同时执行，从而减少建立呼叫的延迟。

公开(公告)号：US09100266B2

公开(公告)日：2015-08-04

申请号：US11147665

申请日：2005-06-08

申请人： Furquan Ahmed Ansari ,  Tirunell V. Lakshman ,  Thyagarajan Nandagopal ,  Ramachandran Ramjee ,  Thomas Y. Woo

发明人： Furquan Ahmed Ansari ,  Tirunell V. Lakshman ,  Thyagarajan Nandagopal ,  Ramachandran Ramjee ,  Thomas Y. Woo

IPC分类号： H04L12/701 ,  H04L12/70

CPC分类号： H04L45/00 ,  H04L2012/5627

摘要： The SoftRouter architecture separates the implementation of control plane functions from packet forwarding functions. In this architecture, all control plane functions are implemented on general purpose servers called the control elements (CEs) that may be multiple hops away from the forwarding elements (FEs). A network element (NE) or a router is formed using dynamic binding between the CEs and the FEs. There is a protocol failover mechanism for handling failovers initiated by FEs to transfer control from one CE to another CE.

摘要翻译： SoftRouter架构将控制平面功能的实现与数据包转发功能分开。 在这种架构中，所有控制平面功能都在通用服务器上实现，称为可能与转发元件（FE）之间多跳的控制元件（CE）。 使用CE和FE之间的动态绑定形成网元（NE）或路由器。 有一个协议故障转移机制，用于处理FE发起的故障转移，将控制从一个CE传输到另一个CE。

公开(公告)号：US09083708B2

公开(公告)日：2015-07-14

申请号：US12781782

申请日：2010-05-17

申请人： Ramachandran Ramjee ,  Bhavish Aggarwal ,  Pushkar Chitnis ,  George Varghese ,  Ashok Anand ,  Chitra Muthukrishnan ,  Athula Balachandran

发明人： Ramachandran Ramjee ,  Bhavish Aggarwal ,  Pushkar Chitnis ,  George Varghese ,  Ashok Anand ,  Chitra Muthukrishnan ,  Athula Balachandran

IPC分类号： G06F15/16 ,  H04L29/08

CPC分类号： H04L67/1002

摘要： An end host redundancy elimination system and method to provide redundancy elimination as an end system service. Embodiments of the system and method use optimization techniques that reduce server central processing unit (CPU) load and memory footprint as compared to existing approaches. For server storage, embodiments of the system and method use a suite of highly-optimized data structures for managing metadata and cached payloads. An optimized asymmetric max-match technique exploits the inherent structure in data maintained at the server and client and ensures that client processing load is negligible. A load-adaptive fingerprinting technique is used that is much faster than current fingerprinting techniques while still delivering similar compression. Load-adaptive means that embodiments of the fingerprinting technique can adapt CPU usage depending on server load. Embodiments of the system and method operate above the transmission control protocol (TCP) layer, thereby reducing the number of roundtrips needed for data transfer.

摘要翻译： 终端主机冗余消除系统和方法，作为终端系统服务提供冗余消除。 与现有方法相比，系统和方法的实施例使用减少服务器中央处理单元（CPU）负载和存储器占用的优化技术。 对于服务器存储，系统和方法的实施例使用一组高度优化的数据结构来管理元数据和高速缓存的有效载荷。 优化的非对称最大匹配技术利用了在服务器和客户机上维护的数据的固有结构，并确保客户端处理负载可以忽略不计。 使用比当前指纹技术更快的负载自适应指纹技术，同时仍然提供类似的压缩。 负载自适应意味着指纹技术的实施例可以根据服务器负载来调整CPU使用。 系统和方法的实施例在传输控制协议（TCP）层之上操作，从而减少数据传输所需的往返次数。

公开(公告)号：US08488501B2

公开(公告)日：2013-07-16

申请号：US12363450

申请日：2009-01-30

申请人： Vishnu Navda ,  Ramachandran Ramjee ,  Venkata N. Padmanabhan ,  Shravan Rayanchu

发明人： Vishnu Navda ,  Ramachandran Ramjee ,  Venkata N. Padmanabhan ,  Shravan Rayanchu

IPC分类号： G08C17/00 ,  H04L12/28

CPC分类号： H04L12/2668 ,  H04L43/0876 ,  H04W52/0229 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/23

摘要： Embodiments of the claimed subject matter provide an approach to managing the power state of wireless network devices in a wireless network. Embodiments include a process for modifying the scheduling of data distribution device by referencing the data buffer in an access point for data intended for a wireless network client operating under a power-saving mode, and re-arranging the distribution queue of the access point to be granted priority for a time which coincides with the delivery of a polling beacon to the power-saving wireless client. Other embodiments include a method to create virtual access points for a particular usage, and to leverage access points in a wireless network for particular usages of devices in range.