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1. 发明申请

US20080297413A1 Slotted Sectored Scheduling with Steerable Directional Antennas in Wireless LANS 审中-公开
标题翻译：无线局域网中带有可导向定向天线的时隙调度
公开(公告)号：US20080297413A1
公开(公告)日：2008-12-04
申请号：US12129027
申请日：2008-05-29
申请人： Ravindranath Kokku , Samrat Ganguly , Vishnu Navda
发明人： Ravindranath Kokku , Samrat Ganguly , Vishnu Navda
IPC分类号： H04Q7/20 , H04B7/10 , H04L12/56
CPC分类号： H04W72/082 , H04B7/0408 , H04W16/28
摘要： A method includes determining for each access point and each associated client that has traffic to exchange with the access point in either directions of a link a pattern of slots of times that causes minimum interference to clients of other access points in a wireless local area network; deriving a conflict graph of pair wise patterns of different access points representing which patterns conflict on a particular client, the conflict graph representing which patterns of the slots cannot be scheduled simultaneously in a slot so as to avoid interference; and generating a schedule for each access points in the slots such that no two conflicting patterns for two different access points are scheduled in the same slot.
摘要翻译：一种方法包括为每个接入点和每个相关联的客户端确定具有业务量以在链路的任一方向上与接入点交换的时间的时隙模式，其对无线局域网中的其他接入点的客户端造成最小的干扰; 得出表示哪个模式在特定客户端上冲突的不同接入点的成对模式的冲突图，表示不能在时隙中同时调度时隙的哪些模式以避免干扰的冲突图; 并且为这些时隙中的每个接入点生成一个调度，使得两个不同接入点的两个冲突模式在相同的时隙中被调度。

2. 发明申请

US20080130541A1 Method and System for Dynamic Power Management in Wireless Local Area Networks 有权
标题翻译：无线局域网动态电源管理方法与系统
公开(公告)号：US20080130541A1
公开(公告)日：2008-06-05
申请号：US11935648
申请日：2007-11-06
申请人： Ravidranath Kokku , Vishnu Navda , Samrat Ganguly
发明人： Ravidranath Kokku , Vishnu Navda , Samrat Ganguly
IPC分类号： G08C17/00
CPC分类号： H04W52/34 , H04W52/367 , H04W56/00 , H04W84/12
摘要： A method and system for improving spatial reuse in a wireless local area network (WLAN) by per-client dynamic power management. Each access point of the WLAN associates each of its clients with a minimum power level. A central controller of the WLAN generates a schedule for transmission at different power levels, and each access point varies its transmission power level based on the schedule. An access point transmits data packets, at the scheduled transmission power level, to clients associated with a minimum power level that is less than the scheduled power level.
摘要翻译：一种通过每客户端动态电源管理改善无线局域网（WLAN）中的空间重用的方法和系统。 WLAN的每个接入点将其每个客户端与最小功率电平相关联。 WLAN的中央控制器产生用于以不同功率电平进行传输的时间表，并且每个接入点根据时间表改变其发射功率电平。接入点以调度的发送功率电平将数据分组发送到与小于所计划的功率电平的最小功率电平相关联的客户端。

3. 发明申请

US20090080377A1 Distributed Channel Management Based on Channel Hopping in Uncoordinated 802.11 Based WLAN 审中-公开
标题翻译：基于无协调802.11的无线局域网中基于信道跳转的分布式信道管理
公开(公告)号：US20090080377A1
公开(公告)日：2009-03-26
申请号：US11860104
申请日：2007-09-24
申请人： Samrat Ganguly , Vishnu Navda , Aniruddha Bohra , Daniel S. Rubenstein
发明人： Samrat Ganguly , Vishnu Navda , Aniruddha Bohra , Daniel S. Rubenstein
IPC分类号： H04Q7/00
CPC分类号： H04W16/10
摘要： In accordance with the invention, a method includes i) obtaining first for each AP hopping sequences of other interfering APs; and ii) determining for the AP a respective hopping sequence that maximizes each APs throughput. Preferably, the step of determining comprises for each slot AP choosing a channel that minimizes the number of edges which violate a k-coloring property. In an exemplary embodiment, the method further includes the step of the AP selecting one of (a) a channel uniformly at random from all such channels and (b) selecting a channel that distributes interference evenly as possible among neighboring APs.
摘要翻译：根据本发明，一种方法包括：i）首先获得其他干扰AP的每个AP跳频序列; 以及ii）为所述AP确定使每个AP的吞吐量最大化的相应跳频序列。优选地，确定步骤包括对于每个时隙AP选择使违反k着色特性的边缘数量最小化的信道。在一个示例性实施例中，该方法还包括AP从所有这样的信道中随机均匀地选择（a）信道中的一个的步骤，以及（b）选择尽可能均匀地在相邻AP之间分配干扰的信道。

4. 发明授权

US07944868B2 Method and system for dynamic power management in wireless local area networks 有权
标题翻译：无线局域网动态电源管理方法与系统
公开(公告)号：US07944868B2
公开(公告)日：2011-05-17
申请号：US11935648
申请日：2007-11-06
申请人： Ravidranath Kokku , Vishnu Navda , Samrat Ganguly
发明人： Ravidranath Kokku , Vishnu Navda , Samrat Ganguly
IPC分类号： G08C17/00 , H04W4/00 , H04B7/00 , H04J3/14
CPC分类号： H04W52/34 , H04W52/367 , H04W56/00 , H04W84/12
摘要： A method and system for improving spatial reuse in a wireless local area network (WLAN) by per-client dynamic power management. Each access point of the WLAN associates each of its clients with a minimum power level. A central controller of the WLAN generates a schedule for transmission at different power levels, and each access point varies its transmission power level based on the schedule. An access point transmits data packets, at the scheduled transmission power level, to clients associated with a minimum power level that is less than the scheduled power level.
摘要翻译：一种通过每客户端动态电源管理改善无线局域网（WLAN）中的空间重用的方法和系统。 WLAN的每个接入点将其每个客户端与最小功率电平相关联。 WLAN的中央控制器产生用于以不同功率电平进行传输的时间表，并且每个接入点根据时间表改变其发射功率电平。接入点以调度的发送功率电平将数据分组发送到与小于所计划的功率电平的最小功率电平相关联的客户端。

5. 发明授权

US07643427B2 Multipath routing architecture for large data transfers 有权
标题翻译：用于大数据传输的多路径路由架构
公开(公告)号：US07643427B2
公开(公告)日：2010-01-05
申请号：US11690942
申请日：2007-03-26
申请人： Ravindranath Kokku , Aniruddha Bohra , Samrat Ganguly , Rauf Izmailov
发明人： Ravindranath Kokku , Aniruddha Bohra , Samrat Ganguly , Rauf Izmailov
IPC分类号： H04J3/14
CPC分类号： H04L45/00 , H04L45/24 , H04L47/10 , H04L47/11 , H04L47/122 , H04L47/283
摘要： A multipath routing architecture for large data transfers is disclosed. The architecture employs an overlay network that provides diverse paths for packets from communicating end hosts to utilize as much capacity as available across multiple paths while ensuring network-wide fair allocation of resources across competing data transfers. A set of transit nodes are interposed between the end-hosts and for each end-to-end connection, a transit node can logically operate as an entry gateway, a relay or exit gateway. Packets from the sender enter the entry node and go to the exit node either directly or through one of a plurality of relay nodes. The exit node delivers the packets to the receiver. A multipath congestion control protocol is executed on the entry node to harness network capacity for large data transfers.
摘要翻译：公开了一种用于大数据传输的多路径路由架构。该架构采用覆盖网络，为来自通信终端主机的数据包提供不同的路径，以便跨多个路径使用尽可能多的容量，同时确保跨竞争数据传输进行全网络的资源公平分配。一组传输节点插在终端主机之间，并且对于每个端到端连接，传输节点可以逻辑地作为入口网关，中继或退出网关操作。来自发送者的报文输入入口节点，直接或通过多个中继节点之一进入退出节点。退出节点将数据包传送到接收器。在入口节点上执行多径拥塞控制协议，以利用网络容量进行大数据传输。

6. 发明申请

US20070230352A1 Multipath Routing Architecture for Large Data Transfers 有权
标题翻译：用于大数据传输的多路径路由架构
公开(公告)号：US20070230352A1
公开(公告)日：2007-10-04
申请号：US11690942
申请日：2007-03-26
申请人： Ravindranath Kokku , Aniruddha Bohra , Samrat Ganguly , Rauf Izmailov
发明人： Ravindranath Kokku , Aniruddha Bohra , Samrat Ganguly , Rauf Izmailov
IPC分类号： H04J3/14
CPC分类号： H04L45/00 , H04L45/24 , H04L47/10 , H04L47/11 , H04L47/122 , H04L47/283
摘要： A multipath routing architecture for large data transfers is disclosed. The architecture employs an overlay network that provides diverse paths for packets from communicating end hosts to utilize as much capacity as available across multiple paths while ensuring network-wide fair allocation of resources across competing data transfers. A set of transit nodes are interposed between the end-hosts and for each end-to-end connection, a transit node can logically operate as an entry gateway, a relay or exit gateway. Packets from the sender enter the entry node and go to the exit node either directly or through one of a plurality of relay nodes. The exit node delivers the packets to the receiver. A multipath congestion control protocol is executed on the entry node to harness network capacity for large data transfers.
摘要翻译：公开了一种用于大数据传输的多路径路由架构。该架构采用覆盖网络，为来自通信终端主机的数据包提供不同的路径，以便跨多个路径使用尽可能多的容量，同时确保跨竞争数据传输进行全网络的资源公平分配。一组传输节点插在终端主机之间，并且对于每个端到端连接，传输节点可以逻辑地作为入口网关，中继或退出网关操作。来自发送者的报文输入入口节点，直接或通过多个中继节点之一进入退出节点。退出节点将数据包传送到接收器。在入口节点上执行多径拥塞控制协议，以利用网络容量进行大数据传输。

7. 发明申请

US20050015511A1 Accelerated large data distribution in overlay networks 审中-公开
标题翻译：加速覆盖网络中的大数据分布
公开(公告)号：US20050015511A1
公开(公告)日：2005-01-20
申请号：US10749947
申请日：2003-12-31
申请人： Rauf Izmailov , Samrat Ganguly , Nan Tu , Aikaterini Varsou
发明人： Rauf Izmailov , Samrat Ganguly , Nan Tu , Aikaterini Varsou
IPC分类号： G06F15/173 , H04L12/18 , H04L12/56 , H04L29/06 , H04L29/08
CPC分类号： H04L67/06 , H04L12/18 , H04L45/04 , H04L45/12 , H04L45/16 , H04L45/48 , H04L69/14 , Y02D50/30
摘要： A Method and apparatus for dynamically discovering and utilizing unused resources for practical and efficient creation of optimized network mechanisms for data distribution. Proposed techniques for data distribution, assembly, routing and scheduling in broadband networks can be implemented as content-level server platform architecture enabled by application-level control plane. Such a platform accelerates content transfer, mirroring and replication. It applies coordinated data partitioning and resource discovery and sharing of information replication by multiple network systems. Furthermore, it harvests the unutilized bandwidth in the network by disassembling the large content to be distributed into different components. These components are then routed in spatially and temporally diverse routes through multiple paths and trees and assembled at the destination nodes. The result is accelerated content distribution, added security, scalability and robustness. No modifications of existing network communication protocols is required.
摘要翻译：一种用于动态发现和利用未使用资源的方法和装置，用于实际和有效地创建用于数据分发的优化网络机制。用于宽带网络中数据分发，组装，路由和调度的建议技术可以实现为由应用层控制平面启用的内容级服务器平台架构。这样的平台加速了内容传输，镜像和复制。它适用于多个网络系统的协同数据分区和信息复制的资源发现和共享。此外，它通过拆卸要分配到不同组件的大内容来收获网络中未使用的带宽。然后，这些组件通过多个路径和树在空间和时间上不同的路由路由，并在目的地节点处组装。结果是加速了内容分发，增加了安全性，可扩展性和鲁棒性。不需要修改现有的网络通信协议。

8. 发明申请

US20090213740A1 Measurement Based Link Capacity for Multiple Interferers in an 802.11-Based Wireless Network 审中-公开
标题翻译：基于802.11的无线网络中多个干扰器的基于测量的链路容量
公开(公告)号：US20090213740A1
公开(公告)日：2009-08-27
申请号：US12036328
申请日：2008-02-25
申请人： Samrat Ganguly , Anand Kashyap
发明人： Samrat Ganguly , Anand Kashyap
IPC分类号： H04L12/26
CPC分类号： H04L41/147 , H04L41/0896 , H04L43/0882 , H04W16/225
摘要： A method according to the invention includes determining a PHY layer model for a single interferer in an 802.11 wireless network responsive to an input of measured pair wise of at least one of a delivery ratio and received signal strength RSSI values in the 802.11 wireless network; ascertaining a deferral probability for a given node in the network in the presence of multiple interferers in a MAC layer model of the 802.11 network responsive to the determining step in the PHY layer model; and deriving from the ascertaining step at least one of sending capacity in the presence of multiple interferers, packet collision probability in the presence of multiple interferers and available capacity in a given link for a corresponding link delivery ratio.
摘要翻译：根据本发明的方法包括：响应于802.11无线网络中传输率和接收信号强度RSSI值中至少一个的测量对的输入，确定802.11无线网络中的单个干扰源的PHY层模型; 在802.11网络的MAC层模型中响应于PHY层模型中的确定步骤，在存在多个干扰源的情况下确定网络中的给定节点的延迟概率; 以及从所述确定步骤中导出存在多个干扰源的发送容量中的至少一个，在存在多个干扰源的情况下的分组冲突概率以及用于相应链路传送比率的给定链路中的可用容量。

9. 发明授权

US07403482B2 Path provisioning for service level agreements in differentiated service networks 失效
标题翻译：差异化服务网络中服务级别协议的路径配置
公开(公告)号：US07403482B2
公开(公告)日：2008-07-22
申请号：US09897495
申请日：2001-07-03
申请人： Rauf Izmailov , Subir Biswas , Samrat Ganguly
发明人： Rauf Izmailov , Subir Biswas , Samrat Ganguly
IPC分类号： H04J3/16 , H04L12/56
CPC分类号： H04L45/00 , H04L41/12 , H04L41/5003 , H04L41/5019 , H04L45/124
摘要： A system and method for path provisioning in a network calculates an optimal path using a greedy algorithm with backtracking to execute service level agreements (SLAs). More specifically, a sequential path shifting (SPS) algorithm compares a cost of a suboptimal path for a present quadruplet with the cost of switching a path for a previous quadruplet configured for alteration. If the present path is already an optimal path, then no further operations are performed. However, if the cost of a suboptimal path is greater than the switching cost, the previous path is altered so that an optimal path may be configured for the present quadruplet. Otherwise, the present quadruplet maintains its existing path. The capacity of the network is iteratively adjusted to compensate for path selection. The present system may be applied to a differentiated services network or an optical network.
摘要翻译：用于网络中的路径配置的系统和方法使用具有回溯的贪心算法来计算最佳路径以执行服务水平协议（SLA）。更具体地，顺序路径移动（SPS）算法将当前四元组的次优路径的成本与为配置为改变的先前四元组的路径切换的成本进行比较。如果当前路径已经是最佳路径，则不再进行其他操作。然而，如果次优路径的成本大于切换成本，则改变先前的路径，使得可以为本发明的四元组配置最佳路径。否则，现在的四核维护其现有的路径。迭代地调整网络的容量以补偿路径选择。本系统可以应用于差分服务网络或光网络。

10. 发明申请

US20070162462A1 Wide Area Networked File System 有权
标题翻译：广域网文件系统
公开(公告)号：US20070162462A1
公开(公告)日：2007-07-12
申请号：US11616925
申请日：2006-12-28
申请人： Hui Zhang , Aniruddha Bohra , Samrat Ganguly , Rauf Izmailov , Jian Liang
发明人： Hui Zhang , Aniruddha Bohra , Samrat Ganguly , Rauf Izmailov , Jian Liang
IPC分类号： G06F17/30
CPC分类号： G06F17/30067
摘要： Traditional networked file systems like NFS do not extend to wide-area due to network latency and dynamics introduced in the WAN environment. To address that problem, a wide-area networked file system is based on a traditional networked file system (NFS/CIFS) and extends to the WAN environment by introducing a file redirector infrastructure residing between the central file server and clients. The file redirector infrastructure is invisible to both the central server and clients so that the change to NFS is minimal. That minimizes the interruption to the existing file service when deploying WireFS on top of NFS. The system includes an architecture for an enterprise-wide read/write wide area network file system, protocols and data structures for metadata and data management in this system, algorithms for history based prefetching for access latency minimization in metadata operations, and a distributed randomized algorithm for the implementation of global LRU cache replacement scheme.
摘要翻译：由于WAN环境中引入的网络延迟和动态，传统的网络文件系统（如NFS）不会扩展到广域。为了解决这个问题，广域网络文件系统基于传统的网络文件系统（NFS / CIFS），并通过引入位于中央文件服务器和客户端之间的文件转发器基础架构来扩展到WAN环境。文件重定向器基础结构对于中央服务器和客户端都是不可见的，因此对NFS的更改是最小的。这可以最大程度地减少在NFS上部署WireFS时现有文件服务的中断。该系统包括用于企业级读/写广域网文件系统的架构，该系统中用于元数据和数据管理的协议和数据结构，用于基于历史的预取用于元数据操作中的访问延迟最小化的算法，以及分布式随机算法用于实施全局LRU缓存替换方案。

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