公开(公告)号：US20120209952A1

公开(公告)日：2012-08-16

申请号：US13370635

申请日：2012-02-10

申请人： Osama Lotfallah ,  Hang Liu ,  Xavier De Foy

发明人： Osama Lotfallah ,  Hang Liu ,  Xavier De Foy

IPC分类号： G06F15/16

CPC分类号： H04L65/4084 ,  H04L65/608 ,  H04L65/80 ,  H04L67/1095

摘要： A method and apparatus for distribution and reception of content are disclosed. A quality function for a content object may be sent to intermediate cache proxy servers and/or a receiver(s). The quality function provides a functional relationship between at least two quality metrics for the content object so that a perceivable quality of the content object at a receiver may be estimated based on the quality function. The quality function may be represented by a polynomial series and/or a set of mean and standard deviation values. The quality function may be included in media presentation description (MPD) for Dynamic Adaptive Streaming over HTTP (DASH) streaming, or a session description protocol (SDP) message or a Real Time Control Protocol (RTCP) sender report for Real Time Streaming Protocol (RTSP) streaming.

摘要翻译： 公开了一种用于分发和接收内容的方法和装置。 可以将内容对象的质量功能发送到中间缓存代理服务器和/或接收器。 所述质量函数在所述内容对象的至少两个质量度量之间提供功能关系，使得可以基于所述质量函数来估计接收者处的所述内容对象的可感知质量。 质量函数可以由多项式序列和/或一组平均值和标准偏差值表示。 质量功能可以包括在用于基于HTTP的动态自适应流（DASH）流媒体的媒体呈现描述（MPD）中，或者用于实时流协议的会话描述协议（SDP）消息或实时控制协议（RTCP）发送者报告 RTSP）流。

公开(公告)号：US08165835B1

公开(公告)日：2012-04-24

申请号：US12259112

申请日：2008-10-27

申请人： Rahul Singh ,  Dale Brummel ,  Hang Liu ,  Robert Leon Gorsegner ,  Edwin De Angel ,  Jean Charles Pina

发明人： Rahul Singh ,  Dale Brummel ,  Hang Liu ,  Robert Leon Gorsegner ,  Edwin De Angel ,  Jean Charles Pina

IPC分类号： G01R19/00 ,  G06F17/40

CPC分类号： G01R21/1331

摘要： A power measurement and calibration system provides power and line frequency measurements by using a bandpass filter having complex voltage and current outputs from which real and imaginary power components can be determined. Calibration of the filter may be omitted if a complex wavelet filter is used to implement the bandpass filter and a determination of line frequency can also be provided for downstream use. A processor receiving data from the output of the filter can compute real and imaginary power, power factor and the line frequency. The filter may be implemented by a processor executing program instructions, or a digital circuit implementing the filter and optionally a CORDIC rotator for computing the current-to-voltage phase relationship can provide input to the processor for power measurement and calibration of the sample rate to line frequency relationship and for other uses.

摘要翻译： 功率测量和校准系统通过使用具有复数电压和电流输出的带通滤波器来提供功率和线路频率测量，从而可以确定实际和虚拟功率分量。 如果使用复小波滤波器来实现带通滤波器，则也可以省略滤波器的校准，还可以为下游使用提供线路频率的确定。 从滤波器的输出接收数据的处理器可以计算实际功率，虚功率，功率因数和线路频率。 滤波器可以由执行程序指令的处理器或实现滤波器的数字电路和可选地用于计算电流到电压相位关系的CORDIC转子来实现，其可以向处理器提供输入以进行功率测量并将采样率校准到 线频率关系和其他用途。

公开(公告)号：US20120011413A1

公开(公告)日：2012-01-12

申请号：US12989544

申请日：2008-04-29

申请人： Hang Liu ,  Saurabh Mathur

发明人： Hang Liu ,  Saurabh Mathur

IPC分类号： H03M13/00

CPC分类号： H04L1/0009 ,  H03M13/25 ,  H03M13/35 ,  H04L1/0017 ,  H04L1/0056 ,  H04L2001/0093

摘要： A method and apparatus are described including receiving channel condition feedback from a device over a wireless channel, determining response to the channel condition feedback if a forward error correction coding rate is sufficient for the device to recover lost data, adjusting the forward error correction coding rate responsive to the second determining act and generating forward error correction packets using the adjusted forward error correction coding rate from source data.

摘要翻译： 描述了一种方法和装置，包括：通过无线信道从设备接收信道条件反馈;如果前向纠错编码速率足以使设备恢复丢失的数据，则调整对信道条件反馈的响应，调整前向纠错编码率 响应于第二确定动作，并且使用来自源数据的经调整的前向纠错编码率产生前向纠错包。

公开(公告)号：US20110167291A1

公开(公告)日：2011-07-07

申请号：US13061663

申请日：2008-09-03

申请人： Hang Liu ,  Ishan Mandrekar ,  Mingquan Wu ,  Ramkumar Perumanam ,  Saurabh Mathur

发明人： Hang Liu ,  Ishan Mandrekar ,  Mingquan Wu ,  Ramkumar Perumanam ,  Saurabh Mathur

IPC分类号： G06F1/26

CPC分类号： H04W52/20 ,  H04W52/08 ,  H04W52/245

摘要： A method and apparatus are described including receiving, by a transmitter, a report from an associated client, setting and using a downlink transmit power level responsive to the report for data transmissions to the associated client, determining a downlink data loss rate and adjusting the downlink transmit power level responsive to the downlink data loss rate, wherein said report includes received signal strength, client transmit power level and one of link margin and receiver sensitivity. Also described are a method and apparatus including receiving, by a receiver, a request for a report, transmitting the requested report, receiving an instruction to use an uplink transmit power level, setting and using the uplink transmit power level, determining an uplink data loss rate and adjusting the uplink transmit power level responsive to the uplink data loss rate, wherein said report includes said received signal strength, client transmit power level and one of said link margin and said receiver sensitivity.

摘要翻译： 描述了一种方法和装置，包括由发射机从相关联的客户端接收报告，响应于所述报告来设置和使用下行链路发射功率电平，以便向相关联的客户端发送数据，确定下行链路数据丢失率并调整下行链路 响应于下行链路数据丢失率的发射功率电平，其中所述报告包括接收信号强度，客户端发射功率电平以及链路余量和接收机灵敏度之一。 还描述了一种方法和装置，包括由接收机接收对报告的请求，发送所请求的报告，接收使用上行链路发射功率电平的指令，设置和使用上行链路发射功率电平，确定上行链路数据丢失 响应于上行链路数据丢失率来速率和调整上行链路发射功率电平，其中所述报告包括所述接收信号强度，客户端发射功率电平以及所述链路余量和所述接收机灵敏度之一。

公开(公告)号：US20110096711A1

公开(公告)日：2011-04-28

申请号：US12737226

申请日：2008-06-30

申请人： Hang Liu ,  Ishan Mandrekar ,  Minquan Wu ,  Ramkumar Perumanam ,  Saurabh Mathur

发明人： Hang Liu ,  Ishan Mandrekar ,  Minquan Wu ,  Ramkumar Perumanam ,  Saurabh Mathur

IPC分类号： H04H20/71

CPC分类号： H04W74/008 ,  H04W74/0816

摘要： Message formats and apparatus are described that reserve access to a communication medium in a multicast system. A first message, a multicast request-to-send message, includes a duration field having information representing the reserved time for a communication medium, multicast receiver and transmitter address fields, and bits that specifies a destination that is expected to reply to the multicast digital message. The bits that specify a destination can be extended to a plurality of fields that each contain different destination identifiers. Example destination identifiers include association identifiers or media access control addresses. Alternately, the bits that specify a destination can have a first field containing an offset and a second field indicating destinations with respect to the offset. A second message includes a duration field and multicast receiver and transmitter address fields. The second message is used to cancel a data transmission resulting from a multicast request-to-send message.

摘要翻译： 描述了消息格式和装置，其保留对组播系统中的通信介质的访问。 第一消息，即组播请求发送消息，包括具有表示通信介质的保留时间的信息的持续时间字段，多播接收器和发送器地址字段以及指定期望回复多播数字的目的地的位 信息。 指定目的地的位可以扩展到多个字段，每个字段包含不同的目的地标识符。 示例目的地标识符包括关联标识符或媒体访问控制地址。 或者，指定目的地的位可以具有包含偏移的第一字段和指示相对于偏移的目的地的第二字段。 第二个消息包括持续时间字段和多播接收器和发送器地址字段。 第二个消息用于取消由多播请求发送消息导致的数据传输。

公开(公告)号：US20110051651A1

公开(公告)日：2011-03-03

申请号：US12988961

申请日：2008-04-22

申请人： Mingquan Wu ,  Hang Liu

发明人： Mingquan Wu ,  Hang Liu

IPC分类号： H04H20/71

CPC分类号： H04W72/005 ,  H04L12/185 ,  H04L12/189

摘要： A method is described including receiving multiple requests for a multicast service, generating parameters associated with binding paths to a multicast tree to provide the requested multicast service and binding the paths to the multicast tree. Also described is a method including receiving a request for multicast service with a multicast tree identification, binding the multicast tree identification to paths satisfying a quality of service level for the multicast tree identification and transmitting a first message to a multi-hop relay base station. A method is described including receiving requests to delete multicast service from client devices served by multiple paths, generating parameters associated with unbinding paths from a multicast tree to delete the multicast service and unbinding the paths from the multicast tree. Also described is a method for unbinding of paths from the perspective of the relay station.

摘要翻译： 描述了一种方法，包括接收对多播服务的多个请求，生成与到多播树的绑定路径相关联的参数以提供所请求的多播服务并将路径绑定到多播树。 还描述了一种方法，包括：使用多播树标识接收对多播服务的请求，将多播树标识绑定到满足多播树标识的服务质量等级的路径，并将第一消息发送到多跳中继基站。 描述了一种方法，包括从由多个路径服务的客户端设备接收删除多播服务的请求，生成与从多播树中解除绑定路径相关联的参数以删除多播服务并解除绑定多播树路径的请求。 还描述了一种用于从中继站的透视图解除路径的绑定的方法。

公开(公告)号：USD617765S1

公开(公告)日：2010-06-15

申请号：US29353889

申请日：2010-01-15

申请人： Hang Liu

设计人： Hang Liu

公开(公告)号：US20090286565A1

公开(公告)日：2009-11-19

申请号：US12084618

申请日：2006-11-01

申请人： Hang Liu ,  Wen Gao

发明人： Hang Liu ,  Wen Gao

IPC分类号： H04B7/00 ,  H04L27/28

CPC分类号： H04W16/10 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0062 ,  H04W52/04

摘要： A wireless endpoint is a Wireless Regional Area Network (WRAN) endpoint, such as a base station (BS) or customer premise equipment (CPE). The WRAN endpoint performs channel sensing to determine which channels are available for use and begins transmission on an available channel. Upon detection of a TV broadcast on an adjacent channel, the WRAN endpoint adjusts a power level of its transmitted signal.

摘要翻译： 无线终端是无线区域网络（WRAN）端点，例如基站（BS）或客户驻地设备（CPE）。 WRAN端点执行信道感测以确定哪些信道可用于可用信道，并在可用信道上开始传输。 在检测到相邻信道上的TV广播时，WRAN端点调整其发送信号的功率电平。

公开(公告)号：US20090135824A1

公开(公告)日：2009-05-28

申请号：US12084600

申请日：2005-11-09

申请人： Hang Liu

发明人： Hang Liu

IPC分类号： H04L12/56

CPC分类号： H04L45/26 ,  H04L45/02 ,  H04L45/32 ,  H04W40/00 ,  H04W40/02 ,  H04W40/248 ,  H04W40/28

摘要： A system and method for discovering a route between a source node and a destination node in a wireless network including setting an intermediate reply flag of a route request message by the source node, flooding the wireless network with the route request message and responding to the route request message with route reply message by a first intermediate node having a valid route to the destination node, are described. Also described are a system and method for discovering a best route in which case the route reply message becomes a first route reply message. The system and method for discovering a best route includes selecting by the destination on the best route between itself and the source node based on cumulative metrics received in route request messages received by the destination node, creating a further route reply message and unicasting the further route reply message to the source node.

摘要翻译： 一种用于发现无线网络中的源节点与目的地节点之间的路由的系统和方法，包括由所述源节点设置路由请求消息的中间应答标志，用所述路由请求消息充斥所述无线网络并响应所述路由 描述了具有到目的地节点的有效路由的第一中间节点的具有路由回复消息的请求消息。 还描述了用于发现最佳路由的系统和方法，在这种情况下，路由应答消息变为第一路由应答消息。 用于发现最佳路由的系统和方法包括：基于目的地节点接收到的路由请求消息中收到的累积度量，在目的地与源节点之间的最佳路由上进行选择，创建另外的路由应答消息， 回复消息给源节点。

公开(公告)号：US08990663B2

公开(公告)日：2015-03-24

申请号：US12448156

申请日：2006-12-21

申请人： Hang Liu ,  Mary-Luc Champel ,  Mingquan Wu ,  Xiaojun Ma ,  Huanqiang Zhang ,  Jun Li

发明人： Hang Liu ,  Mary-Luc Champel ,  Mingquan Wu ,  Xiaojun Ma ,  Huanqiang Zhang ,  Jun Li

IPC分类号： H04L1/00

CPC分类号： H04L1/0041 ,  H04L1/0045 ,  H04L1/0084

摘要： A method and apparatus are described for protecting real time media including receiving media packets, generating media bit strings from the media packets, applying a forward error correcting code across the generated media bit strings to generate at least one forward error correcting bit string and generating at least one forward error correcting packet from the at least one forward error correcting bit string. Also described are a method and apparatus for recovering from losses of real time media packets including forming media bit strings from received media packets, forming forward error correcting bit strings from received forward error correcting packets, decoding the formed media bit strings and forward error correcting bit strings to obtain recovered media bit strings and recover lost media packets from the recovered media bit strings. Further described is a data structure for a forward error correcting header on computer readable media.

摘要翻译： 描述了一种用于保护实时媒体的方法和装置，包括接收媒体分组，从媒体分组生成媒体比特串，在所生成的媒体比特串上应用前向纠错码，以产生至少一个前向纠错比特串，并在 来自所述至少一个前向纠错位串的至少一个前向纠错分组。 还描述了一种用于从包括从接收的媒体分组形成媒体比特串的实时媒体分组的丢失中恢复的方法和装置，从接收到的前向纠错分组形成前向纠错比特串，解码形成的媒体比特串和前向纠错比特 字符串以获得恢复的媒体比特串并从恢复的媒体比特串恢复丢失的媒体分组。 进一步描述了用于计算机可读介质上的前向纠错头的数据结构。