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公开(公告)号：US20110211517A1
公开(公告)日：2011-09-01
申请号：US12714360
申请日：2010-02-26
申请人： Thomas Moscibroda , Vishnu Navda , Ramachandran Ramjee , Sandeep P. Karanth , Lenin Ravindranath Sivalingam , Jitendra D. Padhye , Ranveer Chandra
发明人： Thomas Moscibroda , Vishnu Navda , Ramachandran Ramjee , Sandeep P. Karanth , Lenin Ravindranath Sivalingam , Jitendra D. Padhye , Ranveer Chandra
CPC分类号： H04H20/63 , H04L1/0009 , H04L1/0015 , H04L1/16 , H04L1/1854 , H04L2001/0093 , H04W8/186 , H04W48/20 , H04W76/40
摘要： A “Wi-Fi Multicaster” provides a practical and efficient Wi-Fi multicast system for environments having potentially large numbers of Wi-Fi clients. Significantly, the Wi-Fi Multicaster does not require any changes to the 802.11 protocol, or to the underlying Wi-Fi infrastructure. In various embodiments, the Wi-Fi Multicaster uses pseudo-broadcast, and augments it with destination control, association control and optional proactive FEC (forward error correction) to improve multicast performance. More specifically, the Wi-Fi Multicaster system converts multicast packets to targeted unicast transmissions. To minimize the amount of airtime consumed, the Wi-Fi Multicaster uses destination control in combination with various algorithms for association control. Further, in various embodiments, the Wi-Fi Multicaster includes an adaptive, proactive FEC scheme to reduce overall packet losses. Finally, to overcome the challenges posed by encryption protocols such as 802.1x, the Wi-Fi Multicaster uses a “virtual multicast interface” that allows clients to “share” a common key for each multicast.
摘要翻译： “Wi-Fi Multicaster”为具有潜在大量Wi-Fi客户端的环境提供了实用且高效的Wi-Fi组播系统。 重要的是，Wi-Fi Multicaster不需要对802.11协议或底层Wi-Fi基础设施进行任何更改。 在各种实施例中，Wi-Fi Multicaster使用伪广播，并且将其与目的地控制，关联控制和可选的主动FEC（前向纠错）相加以提高多播性能。 更具体地说，Wi-Fi Multicaster系统将多播分组转换为目标单播传输。 为了最大限度地减少消耗的通话时间，Wi-Fi Multicaster将目的地控制与各种算法结合使用，进行关联控制。 此外，在各种实施例中，Wi-Fi多播卡器包括自适应主动FEC方案以减少总体分组丢失。 最后，为了克服802.1x等加密协议带来的挑战，Wi-Fi Multicaster使用“虚拟多播接口”，允许客户端“共享”每个组播的公共密钥。
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公开(公告)号：US08411608B2
公开(公告)日：2013-04-02
申请号：US12714360
申请日：2010-02-26
申请人： Ranveer Chandra , Sandeep P. Karanth , Thomas Moscibroda , Vishnu Navda , Jitendra D. Padhye , Ramachandran Ramjee , Lenin Ravindranath Sivalingam
发明人： Ranveer Chandra , Sandeep P. Karanth , Thomas Moscibroda , Vishnu Navda , Jitendra D. Padhye , Ramachandran Ramjee , Lenin Ravindranath Sivalingam
IPC分类号： H04H20/71
CPC分类号： H04H20/63 , H04L1/0009 , H04L1/0015 , H04L1/16 , H04L1/1854 , H04L2001/0093 , H04W8/186 , H04W48/20 , H04W76/40
摘要： A “Wi-Fi Multicaster” provides a practical and efficient Wi-Fi multicast system for environments having potentially large numbers of Wi-Fi clients. Significantly, the Wi-Fi Multicaster does not require any changes to the 802.11 protocol, or to the underlying Wi-Fi infrastructure. In various embodiments, the Wi-Fi Multicaster uses pseudo-broadcast, and augments it with destination control, association control and optional proactive FEC (forward error correction) to improve multicast performance. More specifically, the Wi-Fi Multicaster system converts multicast packets to targeted unicast transmissions. To minimize the amount of airtime consumed, the Wi-Fi Multicaster uses destination control in combination with various algorithms for association control. Further, in various embodiments, the Wi-Fi Multicaster includes an adaptive, proactive FEC scheme to reduce overall packet losses. Finally, to overcome the challenges posed by encryption protocols such as 802.1x, the Wi-Fi Multicaster uses a “virtual multicast interface” that allows clients to “share” a common key for each multicast.
摘要翻译： Wi-Fi Multicaster为具有潜在大量Wi-Fi客户端的环境提供了实用且高效的Wi-Fi组播系统。 重要的是，Wi-Fi Multicaster不需要对802.11协议或底层Wi-Fi基础设施进行任何更改。 在各种实施例中，Wi-Fi Multicaster使用伪广播，并且将其与目的地控制，关联控制和可选的主动FEC（前向纠错）相加以提高多播性能。 更具体地说，Wi-Fi Multicaster系统将多播分组转换为目标单播传输。 为了最大限度地减少消耗的通话时间，Wi-Fi Multicaster将目的地控制与各种算法结合使用，进行关联控制。 此外，在各种实施例中，Wi-Fi多播卡器包括自适应主动FEC方案以减少总体分组丢失。 最后，为了克服802.1x等加密协议带来的挑战，Wi-Fi Multicaster使用虚拟组播接口，允许客户端共享每个组播的公共密钥。
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公开(公告)号：US20130023216A1
公开(公告)日：2013-01-24
申请号：US13188395
申请日：2011-07-21
IPC分类号： H04B15/00
摘要： The coexistence of a plurality of different wireless networks that concurrently operate in a common geographic region is optimized. A query is received from a wireless node requesting advice on specific portions of a radio frequency spectrum to use. A spectrum recommendation procedure is then run to generate advice on recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum. A recommendation reply is then sent to the wireless node which includes information specifying the recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum.
摘要翻译： 同时在公共地理区域中操作的多个不同无线网络的共存被优化。 从无线节点接收到询问要使用的无线电频谱的特定部分的建议。 然后运行频谱推荐程序以产生关于无线节点的推荐部分的建议，以使无线节点使用以便最小化频谱中的一个或多个干扰，或频谱中的噪声或频谱中的争用。 然后将推荐答复发送到无线节点，无线节点包括指定无线节点使用的无线电频谱的推荐部分的信息，以便最小化频谱中的一个或多个干扰，或频谱中的噪声，或频谱中的争用 光谱。
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公开(公告)号：US20120148068A1
公开(公告)日：2012-06-14
申请号：US12962676
申请日：2010-12-08
CPC分类号： H04W16/14 , H04R2410/00 , H04R2420/07 , H04W52/50
摘要： Architecture that enables wireless narrowband devices (e.g., wireless microphones) and white space devices to efficiently coexist on the same telecommunications channels, while not interfering with the usability of the wireless narrowband device. The architecture provides interference detection, strobe generation and detection and, power ramping and suppression (interference-free coexistence with spectrum efficiency). The architecture provides the ability of the white space device to learn about the presence of the microphone. This can be accomplished i using a geolocation database, reactively via a strober device, and/or proactively via the strober device. The strober device can be positioned close to the microphone receiver and signals the presence of a microphone to white space devices on demand. The strober device takes into consideration the microphone's characteristics as well as the relative signal strength from the microphone transmitter versus the white space device, in order to enable maximum use of the available white space spectrum.
摘要翻译： 能够使无线窄带设备（例如，无线麦克风）和空白设备在相同的电信信道上有效共存的架构，同时不干扰无线窄带设备的可用性。 该架构提供干扰检测，选通产生和检测以及功率斜坡抑制（与频谱效率无干扰共存）。 该架构提供了白空间设备了解麦克风的存在的能力。 这可以通过使用地理位置数据库，通过选通设备反应地和/或主动地通过选通设备来实现。 选通设备可以靠近麦克风接收器定位，并根据需要将麦克风存在于空白设备。 选通器件考虑到麦克风的特性以及麦克风发射器与白色空间器件的相对信号强度，以便最大限度地利用可用的空白光谱。
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公开(公告)号：US20110317632A1
公开(公告)日：2011-12-29
申请号：US12822209
申请日：2010-06-24
IPC分类号： H04W72/04
摘要： Described is incorporating white space networking components into a network stack. A user mode spectrum access control component determines which white space channels are currently allowed for use based upon policy, current operating status and availability information obtained from one or more sources. A white space service (e.g., in the WLAN service) receives the availability information. The white space service includes a discovery module that discovers other nodes, and a channel migration module that changes from the current channel to another channel if the current channel is no longer allowed for use. A kernel mode (NDIS layer) white space driver through a miniport driver controls the channel in use as the current channel. An automatic configuration module is provided that switches to Wi-Fi network communication when a Wi-Fi network is present, and switches back when a Wi-Fi network is not present.
摘要翻译： 描述将白色空间网络组件合并到网络堆栈中。 用户模式频谱访问控制组件基于从一个或多个源获得的策略，当前操作状态和可用性信息来确定当前允许使用哪个空白信道。 空白服务（例如，在WLAN服务中）接收可用性信息。 白色空间服务包括发现其他节点的发现模块，以及当前通道不再允许使用时，通道迁移模块从当前通道更改为另一个通道。 通过微型端口驱动程序的内核模式（NDIS层）空白驱动程序控制正在使用的通道作为当前通道。 提供自动配置模块，当Wi-Fi网络存在时切换到Wi-Fi网络通信，并且当Wi-Fi网络不存在时切换回。
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6.发明申请Channel Discovery and Disconnection in Networks Over White Spaces and Other Portions of the Spectrum 有权频道发现和断开在白色空间和频谱的其他部分的网络公开(公告)号：US20100301992A1
公开(公告)日：2010-12-02
申请号：US12473951
申请日：2009-05-28
IPC分类号： G05B19/00
CPC分类号： H04W16/14 , H04L27/0006 , H04W72/0453
摘要： Functionality is described for discovering a channel within an environment in which non-privileged entities have subordinate access rights to spectrum compared to privileged entities. The functionality operates by investigating spectrum units within the spectrum for the presence of the channel. In one case, the functionality operates by investigating the spectrum units in linear succession; in another case, the functionality advances in a staggered fashion over the available spectrum. Functionality is also described for handling disconnection by a node from a channel. The functionality allows the node to convey its disconnection status to other communication participants. In one case, various aspects of the functionality are implemented by performing analysis in the time domain.
摘要翻译： 描述了用于发现非特权实体具有与特权实体相比具有次要访问权限的环境中的信道的功能。 该功能通过调查频谱内的频谱单元来进行信道的存在。 在一种情况下，通过以线性相继调查频谱单位来操作该功能; 在另一种情况下，功能在可用频谱上以交错方式前进。 还描述了用于处理节点与信道的断开连接的功能。 该功能允许节点将其断开状态传达给其他通信参与者。 在一种情况下，通过在时域中执行分析来实现功能的各个方面。
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7.发明授权公开(公告)号：US08879573B2
公开(公告)日：2014-11-04
申请号：US11847034
申请日：2007-08-29
申请人： Paramvir Bahl , Ranveer Chandra , Thomas Moscibroda , Gopala Sri Hari Narlanka , Yunnan Wu , Yuan Yuan
发明人： Paramvir Bahl , Ranveer Chandra , Thomas Moscibroda , Gopala Sri Hari Narlanka , Yunnan Wu , Yuan Yuan
IPC分类号： H04L12/413 , H04W16/14 , H04L12/26
CPC分类号： H04L12/2602 , H04L43/00 , H04L43/0882 , H04L43/16 , H04W16/14
摘要： A new media access control (MAC) protocol for cognitive wireless networks is described. The new MAC protocol allows each of multiple nodes, such as cell phones and computers with wireless, to determine utilization of a communication spectrum, such as the television broadcast band. The nodes collaborate to achieve a combined view of spectrum utilization in their local vicinity, in which scheduled users and empty time segments are mapped across a wide range of frequencies. Nodes negotiate with each other to reserve idle segments of the spectrum for packet exchange on negotiated frequencies. Control packet structure allows nodes to become prescient of the local spectrum utilization during handshaking. A cognitive device operating under the new MAC has a first radio that both scans the spectrum and monitors a control channel; and a second reconfigurable radio with adjustable parameters, including frequency and bandwidth, for packet transmission.
摘要翻译： 描述了用于认知无线网络的新的媒体接入控制（MAC）协议。 新的MAC协议允许诸如蜂窝电话和具有无线的计算机的多个节点中的每一个确定诸如电视广播频带之类的通信频谱的利用。 节点协作实现其本地附近的频谱利用的组合视图，其中调度的用户和空时间段在广泛的频率范围内被映射。 节点相互协商以在协商的频率上保留用于分组交换的频谱的空闲段。 控制分组结构允许节点在握手期间变得预先考虑本地频谱利用。 在新MAC下操作的认知设备具有扫描频谱并监视控制信道的第一无线电; 以及用于分组传输的具有可调参数（包括频率和带宽）的第二可重新配置的无线电。
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公开(公告)号：US20120244847A1
公开(公告)日：2012-09-27
申请号：US13071538
申请日：2011-03-25
IPC分类号： H04L29/06
CPC分类号： H04W76/023 , H04L67/06 , H04L67/18 , H04W4/023 , H04W76/14 , H04W76/15 , H04W84/12 , H04W88/182 , H04W92/18
摘要： Described herein are technologies that facilitate transfer of data-intensive content between portable telephones. Phones are configured to transmit data indicative of phone location to a proxy server by way of respective cellular network data connections. When a user of a phone wishes to acquire content that is labeled as shareable on another phone, the user of the phone initiates a location-based request, which causes the proxy server to provide a list of phones that are estimated to be in Wi-Fi range of such phone. The user thereafter selects a particular phone, and the proxy server instructs that phone to activate its Wi-Fi radio. The phone of the user additionally activates its Wi-Fi radio, and a peer-to-peer connection between phones is established. Thereafter, rich content is transferrable between the phones.
摘要翻译： 这里描述的是便于在便携式电话之间传输数据密集型内容的技术。 电话被配置为通过相应的蜂窝网络数据连接将指示电话位置的数据发送到代理服务器。 当电话用户希望获取标记为在另一电话上可共享的内容时，电话用户启动基于位置的请求，这导致代理服务器提供估计为在Wi- Fi范围这样的手机。 用户此后选择特定的电话，代理服务器指示该电话激活其Wi-Fi无线电。 用户的电话另外激活其Wi-Fi无线电，并建立电话之间的对等连接。 此后，丰富的内容可以在手机之间传输。
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公开(公告)号：US20110306375A1
公开(公告)日：2011-12-15
申请号：US12796683
申请日：2010-06-09
申请人： Ranveer Chandra , Thomas Moscibroda , Xiaohui Wang
发明人： Ranveer Chandra , Thomas Moscibroda , Xiaohui Wang
CPC分类号： H04W24/00 , H04B2201/692 , H04J11/0056 , H04L5/0007 , H04L27/0006 , H04W72/00 , H04W72/0453 , H04W72/048
摘要： There is provided a computer-implemented method for transmitting data over a wireless network using white spaces. A first white space transmission channel is determined for communicating with mobile client devices. Wireless communication takes place with the mobile client devices over the first white space transmission channel. If the first white space transmission channel becomes unavailable to one of the mobile client devices because of the presence of a primary user on the first white space transmission channel, a different white space transmission channel is determined for communicating with the mobile client device that is affected. The first white space transmission channel may become unavailable to the affected mobile client device, for example, because a primary user begins using the first white space transmission channel in proximity to the affected device. The primary user may be a wireless microphone. Thereafter, communication with the affected wireless device takes place on the different white space transmission channel, while unaffected devices continue to communicate on the first white space transmission channel. Also provided are an exemplary wireless base station and an exemplary mobile client device.
摘要翻译： 提供了一种用于通过无线网络使用空格来发送数据的计算机实现的方法。 确定用于与移动客户端设备通信的第一空白传输信道。 移动客户端设备通过第一个空白传输信道进行无线通信。 如果第一空白传输信道由于第一空白传输信道上的主用户的存在而变得不能用于移动客户端设备之一，则确定不同的空白传输信道用于与受影响的移动客户端设备进行通信 。 受影响的移动客户端设备的第一个空白传输信道可能变得不可用，例如，因为主用户开始在受影响的设备附近使用第一个空白传输信道。 主要用户可以是无线麦克风。 此后，与受影响的无线设备的通信发生在不同的空白传输信道上，而未受影响的设备在第一空白传输信道上继续通信。 还提供了示例性无线基站和示例性移动客户端设备。
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公开(公告)号：US07876786B2
公开(公告)日：2011-01-25
申请号：US12061577
申请日：2008-04-02
申请人： Paramvir Bahl , Ranveer Chandra , Thomas Moscibroda , Gopala Sri Hari Narlanka , Yunnan Wu , Yuan Yuan
发明人： Paramvir Bahl , Ranveer Chandra , Thomas Moscibroda , Gopala Sri Hari Narlanka , Yunnan Wu , Yuan Yuan
IPC分类号： H04J4/00
CPC分类号： H04W72/0446 , H04L5/0023 , H04L5/0032 , H04L5/0039 , H04L5/0066 , H04L5/0094 , H04W16/14
摘要： Dynamic time-spectrum block allocation for cognitive radio networks is described. In one implementation, without need for a central controller, peer wireless nodes collaboratively sense local utilization of a communication spectrum and collaboratively share white spaces for communication links between the nodes. Sharing local views of the spectrum utilization with each other allows the nodes to dynamically allocate non-overlapping time-frequency blocks to the communication links between the nodes for efficiently utilizing the white spaces. The blocks are sized to optimally pack the available white spaces. The nodes regularly readjust the bandwidth and other parameters of all reserved blocks in response to demand, so that packing of the blocks in available white spaces maintains a fair distribution of the overall bandwidth of the white spaces among active communication links, minimizes finishing time of all communications, reduces contention overhead among the nodes contending for the white spaces, and maintains non-overlapping blocks.
摘要翻译： 描述了认知无线电网络的动态时频块分配。 在一个实现中，不需要中央控制器，对等无线节点协同地感知通信频谱的本地利用，并且协作地共享用于节点之间的通信链路的空白空间。 共享频谱利用率的局部视图允许节点动态地将不重叠的时间频率块分配给节点之间的通信链路，以有效地利用白色空间。 这些块的大小可以最佳地打包可用的空白空间。 节点响应于需求定期重新调整所有保留块的带宽和其他参数，使得可用空白块中的块的打包保持主动通信链路之间白色空间的总带宽的公平分配，最小化所有的完成时间 通信，减少竞争白空间的节点之间的争用开销，并维护不重叠的块。
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