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11. 发明授权

US07099273B2 Data transport acceleration and management within a network communication system 有权
公开(公告)号：US07099273B2
公开(公告)日：2006-08-29
申请号：US10061574
申请日：2002-01-29
申请人： Sungwon Ha , Sung-wook Han , Tae-eun Kim , Vaduvur Bharghavan , Upamanyu Madhow , Kannan Ramchandran
发明人： Sungwon Ha , Sung-wook Han , Tae-eun Kim , Vaduvur Bharghavan , Upamanyu Madhow , Kannan Ramchandran
IPC分类号： H04J1/16 , H04J3/14
CPC分类号： H04L1/0018 , H04L1/0002 , H04L1/1809 , H04L1/1874 , H04L1/188 , H04L1/1887 , H04L29/06 , H04L47/10 , H04L47/193 , H04L47/20 , H04L47/28 , H04L47/283 , H04L47/37 , H04L69/16 , H04L69/161 , H04L69/162 , H04L69/163 , Y02D50/10
摘要： Improved data transport and management within a network communication system may be achieved by utilizing a transmit timer incorporated within the sender device and exploiting host-level statistics for a plurality of connections between a sender and receiver. The period of the transmit timer may be periodically adjusted based on a ratio of the smoothed round-trip time and the smoothed congestion window, thereby reducing or eliminating bursty data transmission commonly associated with conventional TCP architectures. For applications having a plurality of connections between a sender and a receiver that share a common channel, such as web applications, the congestion window and smoothed round trip time estimates for all active connections may be used to initialize new connections and allocate bandwidth among existing connections. This aspect of the present invention may reduce the destructive interference that may occur as different connections compete with one another to maximize the bandwidth of each connection without regard to other connections serving the same application. Error recovery may also be improved by incorporating a short timer and a long timer that are configured to reduce the size of the congestion window and the corresponding transmission rate in response to a second packet loss with a predefined time period in order to increase resilience to random packet loss.

12. 发明授权

US08325753B1 Selective suppression of 802.11 ACK frames 有权
标题翻译：选择性抑制802.11 ACK帧
公开(公告)号：US08325753B1
公开(公告)日：2012-12-04
申请号：US12194289
申请日：2008-08-19
申请人： Vaduvur Bharghavan , Vinay Sagar , Mohan Ram
发明人： Vaduvur Bharghavan , Vinay Sagar , Mohan Ram
IPC分类号： H04L12/28
CPC分类号： H04L1/1854 , H04W28/06 , H04W88/08
摘要： ACK messages by access points are suppressed when those access points receive messages from wireless stations for which those access points should not respond. This might occur in wireless communication systems based upon 802.11 protocols in which seamless mobility is desired, with a system controller that assigns wireless stations to specific access points. The access point examines an incoming message from a wireless device to decide whether or not to suppress a responsive ACK message to that wireless device. An access point may suppress an ACK message by suppressing the generation of the ACK, or by suppressing the transmission of a generated ACK. Mechanisms for suppressing an ACK message include setting the ACK transmission to a relatively unpowered transmitting antenna; interrupting a PHY-layer element during receipt of an incoming frame; and limiting entries in a key cache table to suppress ACK messages in response to encrypted incoming frames.
摘要翻译：当这些接入点接收来自这些接入点不应响应的无线站的消息时，接入点的ACK消息被抑制。这可能发生在基于802.11协议的无线通信系统中，其中无线移动性是期望的，系统控制器将无线站分配给特定的接入点。接入点检查来自无线设备的进入消息以决定是否抑制对该无线设备的响应ACK消息。接入点可以通过抑制ACK的生成或通过抑制所生成的ACK的发送来抑制ACK消息。用于抑制ACK消息的机制包括将ACK传输设置为相对无动力的发射天线; 在接收到帧期间中断PHY层元素; 并且限制密钥高速缓存表中的条目以响应于加密的传入帧来抑制ACK消息。

13. 发明授权

US07808908B1 Wireless rate adaptation 有权
标题翻译：无线速率适配
公开(公告)号：US07808908B1
公开(公告)日：2010-10-05
申请号：US11525246
申请日：2006-09-20
申请人： Vaduvur Bharghavan , Ho Yin Starsky Wong , Hao Yang , Songwu Lu
发明人： Vaduvur Bharghavan , Ho Yin Starsky Wong , Hao Yang , Songwu Lu
IPC分类号： H04J1/16
CPC分类号： H04W28/22 , H04L1/0002 , H04L1/0015 , H04L1/18 , H04W74/0816
摘要： A method of adapting wireless transmission rates that includes the steps of determining at least a short-term loss ratio for wireless communication during a window of time, and adapting a transmission rate responsive to at least the short-term loss ratio, a maximum tolerable loss threshold for the communication during the window, and an opportunistic rate increase threshold for the communication during the window. A size of the window, the maximum tolerable loss threshold, and the opportunistic rate increase threshold are responsive to the transmission rate used for the communication. Preferably, the window is re-started if the transmission rate changes. Also, systems, devices, and memories that embody the foregoing.
摘要翻译：一种适应无线传输速率的方法，其包括以下步骤：在时间窗口期间确定无线通信的至少短期损耗比，以及响应于至少短期损耗比率来适应传输速率，最大容许损耗在窗口期间通信的阈值，以及窗口期间的通信的机会率增加阈值。窗口的大小，最大可容忍损失阈值和机会率增加阈值响应于用于通信的传输速率。优选地，如果传输速率改变，则窗口被重新启动。而且，体现前述的系统，设备和存储器。

14. 发明授权

US08238834B1 Diagnostic structure for wireless networks 有权
标题翻译：无线网络的诊断结构
公开(公告)号：US08238834B1
公开(公告)日：2012-08-07
申请号：US12388346
申请日：2009-02-18
申请人： Vaduvur Bharghavan , Jari Malinen , Dhaval Deshmukh , Mohan Ram Bhadravati , Mohamad Thaga
发明人： Vaduvur Bharghavan , Jari Malinen , Dhaval Deshmukh , Mohan Ram Bhadravati , Mohamad Thaga
IPC分类号： H04B17/00
CPC分类号： H04W24/06 , H04W24/02 , H04W28/18 , H04W84/12
摘要： A set of techniques includes devices, methods, and user interfaces, capable of conducting proactive automated tests of a wireless system, and capable of operating while the wireless system is conducting its normal operations. A diagnostic device not controlled by the wireless system controls drivers and clients in that wireless system's access points, with the effect that the diagnostic device can inject message traffic into the wireless system while simulating clients of that system. The wireless system responds to that traffic and those simulated clients as if real clients were generating substantially real traffic for the system to handle. The diagnostic device can initiate messages from within that wireless system, can force those messages to traverse selected trajectories in that system, and can measure aspects of that system in response to those messages. Trajectories might include specific wireless devices, specific wireless parameters, and specific physical paths.
摘要翻译：一组技术包括能够进行无线系统的主动自动化测试的设备，方法和用户界面，并且能够在无线系统进行其正常操作时操作。由无线系统控制的诊断设备可控制该无线系统的接入点中的驱动程序和客户机，其结果是诊断设备可以在模拟该系统的客户端时将消息流量注入无线系统。无线系统响应该流量和那些模拟客户端，就像真实客户端正在生成实质上实际的流量以供系统处理一样。该诊断设备可以发起来自该无线系统内的消息，可以迫使这些消息遍历该系统中所选择的轨迹，并可以响应于这些消息来测量该系统的各个方面。轨迹可能包括特定的无线设备，特定的无线参数和特定的物理路径。

15. 发明授权

US08064601B1 Security in wireless communication systems 有权
标题翻译：无线通信系统中的安全
公开(公告)号：US08064601B1
公开(公告)日：2011-11-22
申请号：US11396400
申请日：2006-03-31
申请人： Senthil Palanisamy , Vaduvur Bharghavan
发明人： Senthil Palanisamy , Vaduvur Bharghavan
IPC分类号： H04L9/00
CPC分类号： H04W12/12 , H04L63/02 , H04W12/08 , H04W88/08
摘要： Wireless security is enforced at L1, in addition to or in lieu of other layers. AP's can switch dynamically from serving to scanning. Scanners listen for authorized frame headers. Scanners either receive, or allow authorized frames to be received, at their destination. Scanners kill unauthorized frames while they are still transmitting; scanners continue listening for and killing unauthorized frame headers until frame ending time demands their return to serving, multiplying their effectiveness. AP's include dual-mode multi-frequency omni-directional antennae, used to prevent third parties from snooping messages received at those AP's.
摘要翻译：除了或代替其他层之外，L1还实施无线安全性。 AP可以从服务切换到扫描。扫描仪监听授权的帧头。扫描仪在其目的地接收或允许接收授权的帧。扫描仪在仍然传输时杀死未授权的帧; 扫描仪继续侦听并杀死未经授权的帧头，直到帧结束时间要求他们返回服务，从而使其效力倍增。 AP包括双模多频全向天线，用于防止第三方窥探那些AP接收到的消息。

16. 发明授权

US08941539B1 Dual-stack dual-band MIMO antenna 有权
标题翻译：双栈双频MIMO天线
公开(公告)号：US08941539B1
公开(公告)日：2015-01-27
申请号：US13032917
申请日：2011-02-23
申请人： Vaduvur Bharghavan , Rajendran Chary
发明人： Vaduvur Bharghavan , Rajendran Chary
IPC分类号： H01Q1/38
CPC分类号： H01Q5/371 , H01Q1/243 , H01Q9/0414 , H01Q9/0421 , H01Q21/24 , H01Q21/28
摘要： A dual-band antenna including a ground plane, a first resonating plate that resonates in a first frequency band, a first shorting plate that shorts the first resonating plate to the ground plane, a second resonating plate that resonates in a second frequency band, with the second resonating plate raised above the first resonating plate with respect to the ground plane, and a second shorting plate that shorts the second resonating plate to the first resonating plate. Also, a dual-stack dual-band MIMO antenna comprising four dual-band antennas arranged in a square or rectangular pattern.
摘要翻译：一种双频天线，包括接地平面，在第一频带中共振的第一谐振板，将第一谐振板与接地平面相连的第一短路板，在第二频带中谐振的第二谐振板，所述第二谐振板相对于所述接地平面升高在所述第一谐振板上方，以及将所述第二谐振板与所述第一谐振板相连的第二短路板。另外，双栈双频MIMO天线包括以正方形或矩形图案排列的四个双频天线。

17. 发明授权

US08903320B1 Operating wireless communication systems in close proximity 有权
标题翻译：近距离操作无线通信系统
公开(公告)号：US08903320B1
公开(公告)日：2014-12-02
申请号：US12978207
申请日：2010-12-23
申请人： Vaduvur Bharghavan , Mohan Ram
发明人： Vaduvur Bharghavan , Mohan Ram
IPC分类号： H04B15/00
CPC分类号： H04L1/0002 , H04W28/18 , H04W74/006 , H04W92/02
摘要： A method wherein a message packet is received at a node in a 1st wireless communication system, wherein said 1st wireless communication system determines whether it is experiencing interference with a 2nd wireless communication system, and wherein said 1st wireless communication system takes action to reduce said interference. Reducing said interference might include reduction in signal strength, change in message coding, and other actions, in response to a set of selected interference thresholds. Different protocol effects might be changed in response to one or more said thresholds, with the effect that distinct wireless communication systems may operate in relatively close proximity with a minimum of interference.
摘要翻译：一种方法，其中在第一无线通信系统中的节点处接收消息分组，其中所述第一无线通信系统确定其是否正在经历与第二无线通信系统的干扰，并且其中所述第一无线通信系统采取行动以减少所述干扰。响应于一组选择的干扰阈值，减少所述干扰可能包括信号强度的降低，消息编码的变化和其他动作。响应于一个或多个所述阈值可以改变不同的协议效果，其效果是不同的无线通信系统可以以最小的干扰相对接近地进行操作。

18. 发明授权

US08522353B1 Blocking IEEE 802.11 wireless access 有权
标题翻译：阻止IEEE 802.11无线接入
公开(公告)号：US08522353B1
公开(公告)日：2013-08-27
申请号：US12191545
申请日：2008-08-14
申请人： Berend Dunsbergen , Vaduvur Bharghavan
发明人： Berend Dunsbergen , Vaduvur Bharghavan
IPC分类号： H04L29/06
CPC分类号： H04K3/42 , H04K3/41 , H04K2203/18 , H04W88/10
摘要： One or more 802.11 access points that are programmed or otherwise configured to transmit a preferably continuous waveform over a band of frequencies that interferes with other devices in the region, effectively blocking all (or at least most) 802.11 traffic on channels spanned by that band of frequencies.
摘要翻译：被编程或以其他方式配置的一个或多个802.11接入点在与该区域中的其他设备干扰的频带上发送优选地连续的波形，有效地阻挡该频带跨越的频带上的所有（或至少大多数）802.11业务频率

19. 发明申请

US20120284193A1 SYSTEM AND METHOD FOR SECURE COMMUNICATION FOR CASHLESS TRANSACTIONS 审中-公开
标题翻译：用于无交易安全通信的系统和方法
公开(公告)号：US20120284193A1
公开(公告)日：2012-11-08
申请号：US13099240
申请日：2011-05-02
申请人： Vaduvur Bharghavan , Jari Malinen , Rajinder Singh , Jason Fieldman , Rachna Ahlawat , Kannan Konath , Sandeep Gilotra
发明人： Vaduvur Bharghavan , Jari Malinen , Rajinder Singh , Jason Fieldman , Rachna Ahlawat , Kannan Konath , Sandeep Gilotra
IPC分类号： G06Q20/00 , H04L9/28 , G06Q30/00
CPC分类号： G06Q20/202 , H04L9/3263 , H04L9/3271 , H04L2209/56
摘要： Embodiments of the present invention provide a system and method for an access point providing client to point-of-sale communication over a network, comprising: receiving credentials from the point-of-sale; sending at least one beacon message; receiving a probe request from a client; sending a probe response to the client; authenticating a connection with the client: exchanging capabilities with the client; performing a security handshake with the client; assigning at least one dynamic IP address to the client; and establishing an https session between the client and the point-of-sale over the network.
摘要翻译：本发明的实施例提供了一种用于接入点的系统和方法，该接入点通过网络向客户端提供销售点间通信，包括：从销售点接收凭证; 发送至少一个信标消息; 从客户端接收探测请求; 向客户端发送探测响应; 认证与客户端的连接：与客户端交换能力; 与客户进行安全握手; 为客户端分配至少一个动态IP地址; 并通过网络在客户端和销售点之间建立一个https会话。

20. 发明授权

US08160664B1 Omni-directional antenna supporting simultaneous transmission and reception of multiple radios with narrow frequency separation 有权
公开(公告)号：US08160664B1
公开(公告)日：2012-04-17
申请号：US11294673
申请日：2005-12-05
申请人： Rajendran Venugopalachary , Senthil Palanisamy , Srinath Sarang , Vaduvur Bharghavan
发明人： Rajendran Venugopalachary , Senthil Palanisamy , Srinath Sarang , Vaduvur Bharghavan
IPC分类号： H04M1/00
CPC分类号： H04W36/18 , H04W8/02 , H04W8/26 , H04W28/0226 , H04W28/08 , H04W60/00 , H04W84/105
摘要： An omni-directional antenna supporting simultaneous transmission/reception, from the same AP, on multiple frequencies, allowing each AP to communicate using each possible frequency. Each AP multiplexes its outgoing signals onto its transmitting antenna, and de-multiplexes its incoming signals from its receiving antenna. The transmitting and receiving antennae are each substantially located in each other's NULL zone (or one is in the NULL zone of the other). The AP can transmit/receive on many distinct frequencies without needing more antennae.

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