公开(公告)号：US07693939B2

公开(公告)日：2010-04-06

申请号：US11745340

申请日：2007-05-07

申请人： Yunnan Wu ,  Saumitra M. Das ,  Ranveer Chandra ,  Dinei Florencio

发明人： Yunnan Wu ,  Saumitra M. Das ,  Ranveer Chandra ,  Dinei Florencio

IPC分类号： G06F15/16

CPC分类号： H04W40/16 ,  H04L45/123 ,  H04L45/124 ,  H04L45/125 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/22 ,  Y02D70/34

摘要： Context-based routing in multi-hop networks involves using a context-based routing metric. In a described implementation, respective path values are calculated for respective ones of multiple paths using the context-based routing metric. A path is selected from the multiple paths responsive to the calculated path values. Data is transmitted over at least one link of the selected path. In an example embodiment, the context-based routing metric is ascertained responsive to an estimated service interval (ESI) of a bottleneck link of each path of the multiple paths. In another example embodiment, the context-based routing metric is ascertained responsive to an expected resource consumption (ERC) metric. In an example embodiment of path selection, the path is selected using a context-based path pruning (CPP) technique that involves maintaining multiple local contexts at each intermediate node, with each local context representing at least one partial path.

摘要翻译： 在多跳网络中基于背景的路由涉及使用基于上下文的路由度量。 在描述的实现中，使用基于上下文的路由度量针对相应的多个路径计算相应的路径值。 响应于所计算的路径值从多个路径中选择路径。 数据通过所选路径的至少一个链路传输。 在示例实施例中，响应于多个路径的每个路径的瓶颈链路的估计服务间隔（ESI）来确定基于上下文的路由度量。 在另一示例性实施例中，响应于预期资源消耗（ERC）度量来确定基于上下文的路由度量。 在路径选择的示例实施例中，使用基于上下文的路径修剪（CPP）技术来选择路径，其涉及在每个中间节点处维护多个本地上下文，其中每个本地上下文表示至少一个部分路径。

公开(公告)号：US20080279101A1

公开(公告)日：2008-11-13

申请号：US11745340

申请日：2007-05-07

申请人： Yunnan Wu ,  Saumitra M. Das ,  Ranveer Chandra ,  Dinei Florencio

发明人： Yunnan Wu ,  Saumitra M. Das ,  Ranveer Chandra ,  Dinei Florencio

IPC分类号： G06F11/00

CPC分类号： H04W40/16 ,  H04L45/123 ,  H04L45/124 ,  H04L45/125 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/22 ,  Y02D70/34

摘要： Context-based routing in multi-hop networks involves using a context-based routing metric. In a described implementation, respective path values are calculated for respective ones of multiple paths using the context-based routing metric. A path is selected from the multiple paths responsive to the calculated path values. Data is transmitted over at least one link of the selected path. In an example embodiment, the context-based routing metric is ascertained responsive to an estimated service interval (ESI) of a bottleneck link of each path of the multiple paths. In another example embodiment, the context-based routing metric is ascertained responsive to an expected resource consumption (ERC) metric. In an example embodiment of path selection, the path is selected using a context-based path pruning (CPP) technique that involves maintaining multiple local contexts at each intermediate node, with each local context representing at least one partial path.

摘要翻译： 在多跳网络中基于背景的路由涉及使用基于上下文的路由度量。 在描述的实现中，使用基于上下文的路由度量针对相应的多个路径计算相应的路径值。 响应于所计算的路径值从多个路径中选择路径。 数据通过所选路径的至少一个链路传输。 在示例实施例中，响应于多个路径的每个路径的瓶颈链路的估计服务间隔（ESI）来确定基于上下文的路由度量。 在另一示例性实施例中，响应于预期资源消耗（ERC）度量来确定基于上下文的路由度量。 在路径选择的示例实施例中，使用基于上下文的路径修剪（CPP）技术来选择路径，其涉及在每个中间节点处维护多个本地上下文，其中每个本地上下文表示至少一个部分路径。

公开(公告)号：US20080240267A1

公开(公告)日：2008-10-02

申请号：US11731269

申请日：2007-03-30

申请人： Amer Hassan ,  Christian Huitema ,  Wayne Stark ,  Yunnan Wu ,  Philip Chou

发明人： Amer Hassan ,  Christian Huitema ,  Wayne Stark ,  Yunnan Wu ,  Philip Chou

IPC分类号： H04L27/28

CPC分类号： H04W72/08 ,  H04L1/0045 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/0041 ,  H04L5/0046 ,  H04L5/0058 ,  H04L5/006 ,  H04L2001/0093

摘要： A multiuser scheme allowing for a number of users, sets of user, or carriers to share one or more channels is provided. In the invention, the available channel bandwidth is subdivided into a number of equal-bandwidth subchannels according to standard OFDM practice. A transmitter transmits data on a set of OFDM subchannels that need not be contiguous in the spectrum or belong to the same OFDM channel. A receiver receives and decodes the data and detects errors on subchannels. The receiver then broadcasts the identity of those subchannels on which the error rate exceeds a specific threshold, and the transmitter may select different subchannels for transmission based on this information.

摘要翻译： 提供允许多个用户，一组用户或运营商共享一个或多个信道的多用户方案。 在本发明中，可用信道带宽根据标准OFDM实践被细分为多个等带宽子信道。 发射机在不需要在频谱中连续或属于相同OFDM信道的一组OFDM子信道上发送数据。 接收器接收并解码数据并检测子信道上的错误。 然后，接收机广播差错率超过特定阈值的子信道的身份，并且发射机可以基于该信息来选择用于发送的不同子信道。

公开(公告)号：US07324604B2

公开(公告)日：2008-01-29

申请号：US10602743

申请日：2003-06-24

申请人： Andreas Molisch ,  Yunnan Wu ,  Sun Y. Kung

发明人： Andreas Molisch ,  Yunnan Wu ,  Sun Y. Kung

IPC分类号： H04K1/02

CPC分类号： H04B1/7172

摘要： A method and system shapes a spectrum of an impulse radio signal, such as an UWB signal. First, basis pulses at various frequencies and pseudo-random delays are generated. The generated set of basis pulses are then weighted and delayed, and combined linearly to conform the spectrum of the transmitted basis pulses to a spectral mask. The spectral mask can be predetermined, or the conforming can be adaptive. Furthermore, the basis pulses can be frequency-shifted before the combining.

摘要翻译： 一种方法和系统对诸如UWB信号的脉冲无线电信号的频谱进行整形。 首先，生成各种频率的基本脉冲和伪随机延迟。 所生成的基准脉冲集合然后被加权和延迟，并且线性地组合以使所发送的基本脉冲的频谱符合频谱掩模。 光谱掩模可以是预定的，或者符合可以是自适应的。 此外，基准脉冲可以在组合之前进行频移。

公开(公告)号：US06996294B2

公开(公告)日：2006-02-07

申请号：US10967604

申请日：2004-10-18

申请人： Cha Zhang ,  Jin Li ,  Yunnan Wu

发明人： Cha Zhang ,  Jin Li ,  Yunnan Wu

IPC分类号： G06K9/36

CPC分类号： H04N19/597 ,  H04N19/13 ,  H04N19/61 ,  H04N19/615 ,  H04N19/619 ,  H04N19/63

摘要： Rebinning methods and arrangements are provided that significantly improve the 3D wavelet compression performance of the image based rendering data, such as, e.g., concentric mosaic image data. Through what is essentially a selective cutting and pasting process the image data is divided into stripes that are then used to form a set of multi-perspective panoramas. The rebinning process greatly improves the performance of the cross shot filtering, and thus improves the transform and coding efficiency of 3D wavelet codecs. While the region of support after rebinning may cease to be rectangular in some cases, a padding scheme and an arbitrary shape wavelet coder can be implemented to encode the result data volume of the smart rebinning. With an arbitrary shape wavelet codec, the rebinning outperforms MPEG-2 by 3.7 dB, outperforms direct 3D wavelet coder by 4.3 dB, and outperforms a reference block coder (RBC) by 3.2 dB on certain tested concentric mosaic image scenes. Hence, the rebinning process nearly quadruples the compression ratio for selected scenes. Additional methods and arrangements are provided that include selectively dividing the image data into slits and rebinning the slits into a huge 2D array, which is then compressed using conventional still image codecs, such as, JPEG.

公开(公告)号：US20050078875A1

公开(公告)日：2005-04-14

申请号：US10967472

申请日：2004-10-18

申请人： Cha Zhang ,  Jin Li ,  Yunnan Wu

发明人： Cha Zhang ,  Jin Li ,  Yunnan Wu

IPC分类号： G06K9/36 ,  G06K9/46 ,  G06T15/00

CPC分类号： H04N19/597 ,  H04N19/13 ,  H04N19/61 ,  H04N19/615 ,  H04N19/619 ,  H04N19/63

摘要： Rebinning methods and arrangements are provided that significantly improve the 3D wavelet compression performance of the image based rendering data, such as, e.g., concentric mosaic image data. Through what is essentially a selective cutting and pasting process the image data is divided into stripes that are then used to form a set of multi-perspective panoramas. The rebinning process greatly improves the performance of the cross shot filtering, and thus improves the transform and coding efficiency of 3D wavelet codecs. While the region of support after rebinning may cease to be rectangular in some cases, a padding scheme and an arbitrary shape wavelet coder can be implemented to encode the result data volume of the smart rebinning. With an arbitrary shape wavelet codec, the rebinning outperforms MPEG-2 by 3.7 dB, outperforms direct 3D wavelet coder by 4.3 dB, and outperforms a reference block coder (RBC) by 3.2 dB on certain tested concentric mosaic image scenes. Hence, the rebinning process nearly quadruples the compression ratio for selected scenes. Additional methods and arrangements are provided that include selectively dividing the image data into slits and rebinning the slits into a huge 2D array, which is then compressed using conventional still image codecs, such as, JPEG.

公开(公告)号：US20130152211A1

公开(公告)日：2013-06-13

申请号：US13325043

申请日：2011-12-13

申请人： Yunnan Wu ,  Peter Avelino Ruibal ,  Matthew Knight Jones ,  Clement Genzmer

发明人： Yunnan Wu ,  Peter Avelino Ruibal ,  Matthew Knight Jones ,  Clement Genzmer

IPC分类号： G06F15/16 ,  G06F21/00

CPC分类号： G06F21/10

摘要： A prediction is calculated to determine whether a content item posted on a social networking system infringes on copyrights or otherwise violates the system's terms of use. The predictions are generated using social signals that are based on social information surrounding the content item, such as the density of connections between the posting user and the viewing users, the profile information of the users, and the geographical separation between the users. The content item is disabled if the prediction indicates a violation and the violation can be verified.

摘要翻译： 计算预测以确定在社交网络系统上发布的内容项是否侵犯版权或者违反系统的使用条款。 使用基于围绕内容项目的社交信息的社交信号（例如，发布用户和观看用户之间的连接密度，用户的简档信息以及用户之间的地理分离）来生成预测。 如果预测指示违规并且可以验证违规，则内容项被禁用。

公开(公告)号：US08243612B2

公开(公告)日：2012-08-14

申请号：US11832624

申请日：2007-08-01

申请人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

发明人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

IPC分类号： H04W16/02 ,  H04W24/02 ,  H04W28/20 ,  H04B7/00

CPC分类号： H04W16/10 ,  H04W28/16

摘要： Techniques for enhancing throughput capacity and/or bandwidth distribution fairness among APs in a wireless network are described. Specifically, a channel frequency profile which includes a center frequency and channel-width (i.e., channel bandwidth) is dynamically assigned to each of one or more APs in a wireless network. The assigned channel frequency profile for each AP is based, at least in part, on the current composition of the wireless network including, its topology and traffic load distribution. In this regard, each AP's channel frequency profile can be continuously or periodically changed such that the entire available frequency spectrum is effectively utilized and/or interference between APs is avoided or limited. This, in turn, enhances the throughput capacity and/or bandwidth distribution fairness of the wireless network.

摘要翻译： 描述了用于在无线网络中的AP之间增强吞吐量容量和/或带宽分配公平性的技术。 具体地，包括中心频率和信道宽度（即，信道带宽）的信道频率分布被动态分配给无线网络中的一个或多个AP的每一个。 每个AP的分配的信道频率分布至少部分地基于无线网络的当前组成，包括其拓扑和业务负载分布。 在这方面，可以连续地或周期性地改变每个AP的信道频率分布，使得有效利用整个可用频谱和/或避免或限制AP之间的干扰。 这又增强了无线网络的吞吐能力和/或带宽分配公平性。

公开(公告)号：US20110299526A1

公开(公告)日：2011-12-08

申请号：US12791893

申请日：2010-06-02

申请人： Yunnan Wu ,  Yao Zhao ,  Baochun Li ,  Minghua Chen ,  Jin Li ,  Philip A. Chou

发明人： Yunnan Wu ,  Yao Zhao ,  Baochun Li ,  Minghua Chen ,  Jin Li ,  Philip A. Chou

IPC分类号： H04L12/56

CPC分类号： H04L12/1822 ,  H04B7/15521 ,  H04L1/0076 ,  H04L12/1863 ,  H04L45/48 ,  H04L47/12 ,  H04L47/15 ,  H04L47/193 ,  H04L47/27 ,  H04L47/38

摘要： Described is a distributed peer-assisted multicast content delivery system (e.g., a multiparty conferencing application) that uses an adaptive link rate control protocol to discover and adapt to an arbitrary topology quickly and converge to efficient link rate allocations allowed by an underlying network. Link rates are regularly obtained and used to determine trees for sending packets to other nodes. Network coding is used to implement data multicast so that mixtures (i.e., linear combinations) of the packets are transmitted in the network. The redundant packets may be differentiated from non-redundant (“innovative”) packets such that network conditions may be measured by link innovation and/or session innovation.

摘要翻译： 描述了使用自适应链路速率控制协议快速发现和适应任意拓扑并且收敛到底层网络允许的有效链路速率分配的分布式对等辅助多播内容传送系统（例如，多方会议应用）。 定期获取链路速率并用于确定用于向其他节点发送数据包的树。 网络编码用于实现数据多播，使得分组的混合（即线性组合）在网络中传输。 冗余分组可以与非冗余（“创新”）分组区分开，从而可以通过链路创新和/或会话创新来测量网络状况。

公开(公告)号：US20100128628A1

公开(公告)日：2010-05-27

申请号：US12696973

申请日：2010-01-29

申请人： Yunnan Wu ,  Saumitra M. Das ,  Ranveer Chandra ,  Dinei Florencio

发明人： Yunnan Wu ,  Saumitra M. Das ,  Ranveer Chandra ,  Dinei Florencio

IPC分类号： H04L12/26

CPC分类号： H04W40/16 ,  H04L45/123 ,  H04L45/124 ,  H04L45/125 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/22 ,  Y02D70/34

摘要： Context-based routing in multi-hop networks involves using a context-based routing metric. In a described implementation, respective path values are calculated for respective ones of multiple paths using the context-based routing metric. A path is selected from the multiple paths responsive to the calculated path values. Data is transmitted over at least one link of the selected path. In an example embodiment, the context-based routing metric is ascertained responsive to an estimated service interval (ESI) of a bottleneck link of each path of the multiple paths. In another example embodiment, the context-based routing metric is ascertained responsive to an expected resource consumption (ERC) metric. In an example embodiment of path selection, the path is selected using a context-based path pruning (CPP) technique that involves maintaining multiple local contexts at each intermediate node, with each local context representing at least one partial path.

摘要翻译： 在多跳网络中基于背景的路由涉及使用基于上下文的路由度量。 在描述的实现中，使用基于上下文的路由度量针对相应的多个路径计算相应的路径值。 响应于所计算的路径值从多个路径中选择路径。 数据通过所选路径的至少一个链路传输。 在示例实施例中，响应于多个路径的每个路径的瓶颈链路的估计服务间隔（ESI）来确定基于上下文的路由度量。 在另一示例性实施例中，响应于预期资源消耗（ERC）度量来确定基于上下文的路由度量。 在路径选择的示例实施例中，使用基于上下文的路径修剪（CPP）技术来选择路径，其涉及在每个中间节点处维护多个本地上下文，其中每个本地上下文表示至少一个部分路径。