公开(公告)号：US07092405B2

公开(公告)日：2006-08-15

申请号：US10968602

申请日：2004-10-18

申请人： Zihua Guo ,  Qian Zhang ,  Richard Yao ,  Wenwu Zhu

发明人： Zihua Guo ,  Qian Zhang ,  Richard Yao ,  Wenwu Zhu

IPC分类号： H04J3/16 ,  H04J3/18

CPC分类号： H04W36/0088 ,  H04W36/04 ,  H04W36/14 ,  H04W36/22

摘要： A system and method for vertical handoff between different types of wireless networks. A network allocation vector of a first wireless network is sampled for a period of time. The network allocation vector may include a transmission time advertised by a sender in the first wireless network. A network allocation vector occupation is calculated. The calculation of the network allocation vector may include calculating a ratio of an amount of time that the network allocation vector is busy during the time period to a total amount of time during the time period. A wireless network quality of service measure is calculated as a function of the network allocation vector occupation. A vertical handoff may be initiated from a second wireless network to the first wireless network based at least in part on the calculated wireless network quality of service measure.

摘要翻译： 一种用于不同类型无线网络之间垂直切换的系统和方法。 第一无线网络的网络分配向量被采样一段时间。 网络分配向量可以包括由第一无线网络中的发送者通告的传输时间。 计算网络分配向量占用。 网络分配向量的计算可以包括计算网络分配向量在该时间段期间占用的时间量与该时间段内的总时间量的比率。 计算无线网络服务质量度量作为网络分配向量占用的函数。 至少部分地基于所计算的无线网络服务质量度量，可以从第二无线网络向第一无线网络发起垂直切换。

公开(公告)号：US20060156200A1

公开(公告)日：2006-07-13

申请号：US11277260

申请日：2006-03-23

申请人： Qian Zhang ,  Ya-Qin Zhang ,  Wenwu Zhu

发明人： Qian Zhang ,  Ya-Qin Zhang ,  Wenwu Zhu

IPC分类号： H03M13/00

CPC分类号： H04L47/822 ,  H04L47/15 ,  H04L47/193 ,  H04L47/2416 ,  H04L47/263 ,  H04L47/28 ,  H04L47/70 ,  H04L47/762 ,  H04L47/801 ,  H04N7/173 ,  H04N21/234318 ,  H04N21/234354 ,  H04N21/2381 ,  H04N21/2402 ,  H04N21/2662 ,  H04N21/4381 ,  H04N21/44209 ,  H04N21/64322 ,  H04N21/6582

摘要： A resource allocation of multiple compressed AV streams delivered over the Internet is disclosed that achieves end-to-end optimal quality through a multimedia streaming TCP-friendly transport (MSTFP) protocol that adaptively estimates the network bandwidth while smoothing the sending rate. Resources allocated dynamically according to a media encoding distortion and network degradation algorithm. A scheme is also disclosed for dynamically estimating the available network bandwidth for streaming of objects, such as MPEG4 multiple video objects, in conjunction with the MSTFP protocol. The scheme can account for packet-loss rates to minimize end-to-end distortion for media delivery.

公开(公告)号：US20050163098A1

公开(公告)日：2005-07-28

申请号：US11082496

申请日：2005-03-17

申请人： HongBin Liao ,  Qian Zhang ,  Wenwu Zhu ,  Ya-Qin Zhang

发明人： HongBin Liao ,  Qian Zhang ,  Wenwu Zhu ,  Ya-Qin Zhang

IPC分类号： H04L12/56 ,  H04L29/06 ,  H04L29/08 ,  H04L12/26

CPC分类号： H04L69/04 ,  H04L47/10 ,  H04L47/193 ,  H04L47/27 ,  H04L47/37 ,  H04L69/16 ,  H04L69/161 ,  H04L69/163 ,  H04L69/22 ,  H04L69/326

摘要： An implementation of a technology, described herein, for transmitting compressed network transport-layer-protocol headers in a speedy, efficient, inferentially synchronized, and robust manner. An implementation, described herein, models the transmission of compressed headers to the congestion procedure of the network transport-layer protocol (e.g., TCP's). Doing so, the sender of the compressed headers can infer whether the receiver correctly received them. Unlike the slow direct synchronization employed by conventional schemes, this implementation of the present claimed invention inferentially synchronizes by modeling after the congestion procedure of the network transport-layer protocol. This is inherently faster than direct synchronization. Since the implementation performs well over both noiseless and noisy links, it is particularly suited to use over wireless communications channels. This abstract itself is not intended to limit the scope of this patent. The scope of the present invention is pointed out in the appending claims.

公开(公告)号：US20050015427A1

公开(公告)日：2005-01-20

申请号：US10619332

申请日：2003-07-14

申请人： Chuanxiong Guo ,  Jun Yuan ,  Qian Zhang ,  Wenwu Zhu

发明人： Chuanxiong Guo ,  Jun Yuan ,  Qian Zhang ,  Wenwu Zhu

IPC分类号： H04L12/56 ,  G06F13/10 ,  H04L29/06 ,  H04L29/08 ,  H04L29/12 ,  G06F15/16

CPC分类号： H04L61/2571 ,  H04L29/12009 ,  H04L29/12518 ,  H04L63/12 ,  H04L67/26 ,  H04W80/04 ,  H04W88/18

摘要： A middle layer network protocol enhancement, virtual connectivity (VC) makes the network attachment point changes of local and remote peers transparent to applications that use network services. A virtual connectivity module local to each peer translates communication connection parameters from apparent to real and vice versa, as well as sending and receiving secure connection updates directly to and from peers. Unlike Mobile IP, no routing infrastructure modifications are required. A subscribe-notify service provides connection update notifications when direct peer-to-peer connection updates are not possible, for example, when two communicating peers move simultaneously or when the moving peer is communicating with a peer behind network address translation (NAT). Methods for detecting these conditions are disclosed, as is a virtual connectivity protocol and virtual connectivity module architecture.

摘要翻译： 中间层网络协议增强，虚拟连接（VC）使本地和远程对等体的网络连接点更改对使用网络服务的应用程序透明化。 每个对等体本地的虚拟连接模块将通信连接参数从明显转换为实际，反之亦然，以及直接向对方发送和接收安全连接更新。 与移动IP不同，不需要进行路由基础架构修改。 当直接对等连接更新不可行时，例如当两个通信对等体同时移动或当移动对等体与网络地址转换（NAT）之后的对等体通信时，订阅通知服务提供连接更新通知。 公开了用于检测这些条件的方法，以及虚拟连接协议和虚拟连接模块架构。

公开(公告)号：US09536312B2

公开(公告)日：2017-01-03

申请号：US13107986

申请日：2011-05-16

申请人： Cha Zhang ,  Wenwu Zhu ,  Zhengyou Zhang ,  Philip A. Chou

发明人： Cha Zhang ,  Wenwu Zhu ,  Zhengyou Zhang ,  Philip A. Chou

IPC分类号： G06T7/00 ,  G06K9/20

CPC分类号： G06T7/521 ,  G06K9/2036 ,  G06T7/593 ,  G06T2207/10048 ,  G06T2207/10152 ,  G06T2207/30196

摘要： A depth construction module is described that receives depth images provided by two or more depth capture units. Each depth capture unit generates its depth image using a structured light technique, that is, by projecting a pattern onto an object and receiving a captured image in response thereto. The depth construction module then identifies at least one deficient portion in at least one depth image that has been received, which may be attributed to overlapping projected patterns that impinge the object. The depth construction module then uses a multi-view reconstruction technique, such as a plane sweeping technique, to supply depth information for the deficient portion. In another mode, a multi-view reconstruction technique can be used to produce an entire depth scene based on captured images received from the depth capture units, that is, without first identifying deficient portions in the depth images.

摘要翻译： 描述了深度构造模块，其接收由两个或更多个深度捕获单元提供的深度图像。 每个深度捕获单元使用结构化的光技术生成其深度图像，即通过将图案投射到对象上并响应于此而接收捕获的图像。 然后，深度构造模块识别已经接收到的至少一个深度图像中的至少一个缺陷部分，其可归因于撞击物体的重叠投影图案。 然后，深度构建模块使用诸如平面扫描技术的多视图重建技术来为缺陷部分提供深度信息。 在另一种模式中，可以使用多视图重建技术来基于从深度捕获单元接收到的捕获图像来生成整个深度场景，即，没有首先识别深度图像中的不足部分。

公开(公告)号：US08850075B2

公开(公告)日：2014-09-30

申请号：US13177058

申请日：2011-07-06

申请人： Wenwu Zhu ,  Zheng Li ,  Roberto R. Molinari ,  Hongzhi Li

发明人： Wenwu Zhu ,  Zheng Li ,  Roberto R. Molinari ,  Hongzhi Li

IPC分类号： G06F15/16 ,  G06F3/048 ,  G06F17/30 ,  G06T1/20 ,  G06T15/20 ,  H04N1/00 ,  H04L29/08 ,  H04N5/00 ,  H04W4/18

CPC分类号： G06F15/16 ,  G06F3/04815 ,  G06F17/30 ,  G06F17/3028 ,  G06T1/20 ,  G06T15/205 ,  G06T2200/16 ,  H04L67/10 ,  H04L67/2847 ,  H04L67/2885 ,  H04L67/42 ,  H04N1/00 ,  H04N5/00 ,  H04N21/23106 ,  H04N21/4331 ,  H04W4/18

摘要： Predictive, multi-layer caching architectures may be used to predict which elements a user is most likely to navigate to within a collection of elements associated with a predefined layout and, in response, to increase the accessibility of these elements to a client device of the user. For instance, the techniques may utilize a predictive, multi-layer caching architecture for storing these predicted elements to decrease the latency to render these images if the user navigates within the collection of elements in the predicted manner. The collection of elements may comprise images (e.g., a 3D model, a map, etc.), video files, audio files, text files, or any other type of file that is consumable on a client device.

摘要翻译： 预测的多层缓存架构可以用于预测用户最有可能在与预定义布局相关联的元素的集合内导航到哪些元素，并且作为响应来增加这些元素对客户端设备的可访问性 用户。 例如，如果用户以预测的方式在元素集合内导航，那么这些技术可以利用预测的多层缓存架构来存储这些预测的元素以减少渲染这些图像的等待时间。 元素的集合可以包括在客户端设备上可消费的图像（例如，3D模型，地图等），视频文件，音频文件，文本文件或任何其他类型的文件。

公开(公告)号：US20120294510A1

公开(公告)日：2012-11-22

申请号：US13107986

申请日：2011-05-16

申请人： Cha Zhang ,  Wenwu Zhu ,  Zhengyou Zhang ,  Philip A. Chou

发明人： Cha Zhang ,  Wenwu Zhu ,  Zhengyou Zhang ,  Philip A. Chou

IPC分类号： G06K9/00

CPC分类号： G06T7/521 ,  G06K9/2036 ,  G06T7/593 ,  G06T2207/10048 ,  G06T2207/10152 ,  G06T2207/30196

摘要： A depth construction module is described that receives depth images provided by two or more depth capture units. Each depth capture unit generates its depth image using a structured light technique, that is, by projecting a pattern onto an object and receiving a captured image in response thereto. The depth construction module then identifies at least one deficient portion in at least one depth image that has been received, which may be attributed to overlapping projected patterns that impinge the object. The depth construction module then uses a multi-view reconstruction technique, such as a plane sweeping technique, to supply depth information for the deficient portion. In another mode, a multi-view reconstruction technique can be used to produce an entire depth scene based on captured images received from the depth capture units, that is, without first identifying deficient portions in the depth images.

摘要翻译： 描述了深度构造模块，其接收由两个或更多个深度捕获单元提供的深度图像。 每个深度捕获单元使用结构化的光技术生成其深度图像，即通过将图案投射到对象上并响应于此而接收捕获的图像。 然后，深度构造模块识别已经接收到的至少一个深度图像中的至少一个缺陷部分，其可归因于撞击物体的重叠投影图案。 然后，深度构建模块使用诸如平面扫描技术的多视图重建技术来为缺陷部分提供深度信息。 在另一种模式中，可以使用多视图重建技术来基于从深度捕获单元接收到的捕获图像来生成整个深度场景，即，没有首先识别深度图像中的不足部分。

公开(公告)号：US07702932B2

公开(公告)日：2010-04-20

申请号：US11694529

申请日：2007-03-30

申请人： Zihua Guo ,  Richard Yuqi Yao ,  Wenwu Zhu ,  Xin Wang

发明人： Zihua Guo ,  Richard Yuqi Yao ,  Wenwu Zhu ,  Xin Wang

IPC分类号： G06F1/00 ,  G06F1/32

CPC分类号： H04W52/0219 ,  H04L12/12 ,  H04L41/00 ,  H04W28/10 ,  H04W52/0216 ,  H04W84/18 ,  Y02D70/122 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/24

摘要： A power management technique for a network including a plurality of computing devices. The power management technique includes identifying an order in which one or more devices of the plurality of computing devices can transmit data within the prescribed time period. In one aspect, the number of wakeups are reduced for the computing devices within the network by increasing a number of adjacent channel time allocation periods within a prescribed time period that share a common computing device. In one aspect, the network can be based on Time Division Multiple Access (TDMA).

摘要翻译： 一种用于包括多个计算设备的网络的功率管理技术。 功率管理技术包括识别多个计算设备中的一个或多个设备可以在规定的时间段内发送数据的顺序。 在一个方面，通过在共享公共计算设备的规定时间段内增加多个相邻信道时间分配周期来减少网络内的计算设备的唤醒次数。 在一个方面，网络可以基于时分多址（TDMA）。

公开(公告)号：US07636380B2

公开(公告)日：2009-12-22

申请号：US10847259

申请日：2004-05-17

申请人： Richard Yuqi Yao ,  Zihua Guo ,  Weiyu Xu ,  Wenwu Zhu

发明人： Richard Yuqi Yao ,  Zihua Guo ,  Weiyu Xu ,  Wenwu Zhu

IPC分类号： H04B1/00

CPC分类号： H04B1/71632 ,  H04B1/71637 ,  H04B1/7172

摘要： Orthogonal pulse polarity modulation involves wireless communication in which the polarity of modulating pulses are set responsive to positive and negative character values of a corresponding code sequence. In a described implementation, data is converted to chip waveforms, spectrum lines are removed, and pulses are appropriately shaped. For example, a data bit stream may be converted into chip waveforms using a bit stream-to-symbol segmenter, a symbol-to-code sequence mapper, and a code sequence-to-chip waveform transformer. The polarities of respective individual chips in a given chip waveform match the signs of respective individual characters in a corresponding code sequence.

摘要翻译： 正交脉冲极性调制涉及响应于相应代码序列的正和负字符值设置调制脉冲的极性的无线通信。 在所描述的实现中，将数据转换为芯片波形，除去频谱线，并且脉冲被适当地成形。 例如，可以使用比特流到符号分段器，符号到码序列映射器和代码序列到片上波形变换器将数据比特流转换成码片波形。 给定芯片波形中的各个芯片的极性与相应代码序列中各个字符的符号相匹配。

公开(公告)号：US20050254553A1

公开(公告)日：2005-11-17

申请号：US10847259

申请日：2004-05-17

申请人： Richard Yao ,  Zihua Guo ,  Weiyu Xu ,  Wenwu Zhu

发明人： Richard Yao ,  Zihua Guo ,  Weiyu Xu ,  Wenwu Zhu

IPC分类号： H04J13/00 ,  H04B1/69 ,  H04L25/03

CPC分类号： H04B1/71632 ,  H04B1/71637 ,  H04B1/7172

摘要： Orthogonal pulse polarity modulation involves wireless communication in which the polarity of modulating pulses are set responsive to positive and negative character values of a corresponding code sequence. In a described implementation, data is converted to chip waveforms, spectrum lines are removed, and pulses are appropriately shaped. For example, a data bit stream may be converted into chip waveforms using a bit stream-to-symbol segmenter, a symbol-to-code sequence mapper, and a code sequence-to-chip waveform transformer. The polarities of respective individual chips in a given chip waveform match the signs of respective individual characters in a corresponding code sequence.

摘要翻译： 正交脉冲极性调制涉及响应于相应代码序列的正和负字符值设置调制脉冲的极性的无线通信。 在所描述的实现中，将数据转换为芯片波形，除去频谱线，并且脉冲被适当地成形。 例如，可以使用比特流到符号分段器，符号到码序列映射器和代码序列到片上波形变换器将数据比特流转换成码片波形。 给定芯片波形中的各个芯片的极性与相应代码序列中各个字符的符号相匹配。