专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08089892B2 Adaptive joint source and channel coding scheme for H.264 video multicasting over wireless networks 有权
标题翻译：通过无线网络进行H.264视频组播的自适应联合源和信道编码方案
公开(公告)号：US08089892B2
公开(公告)日：2012-01-03
申请号：US12086458
申请日：2005-12-15
申请人： Zhengye Liu , Hang Liu , Yao Wang
发明人： Zhengye Liu , Hang Liu , Yao Wang
IPC分类号： H04L1/00
CPC分类号： H04N21/8451 , H04N21/2383 , H04N21/2385 , H04N21/2402 , H04N21/2662 , H04N21/44209 , H04N21/6405 , H04N21/658
摘要： A method and apparatus for estimating packet loss rate are described including calculating a real packet loss rate in a time slot at the end of the time slot, estimating average packet loss rate for a subsequent time slot, estimating variance of packet loss rate for the subsequent time slot and estimating the packet loss rate for the subsequent time slot. A method and apparatus and also described for dynamically allocating available bandwidth for video multicast including selecting an intra-frame rate, determining a packet loss rate threshold, receiving user topology information, receiving channel conditions for each user, determining an optimal operation point for encoding and transmitting video frames in a subsequent time slot, adapting dynamically quantization parameters and a forward error correction code rate, encoding the video frames using the quantization parameters and applying forward error correction code with the forward error correction code rate to data packets of the video frames to generate forward error correction packets.
摘要翻译：描述了一种用于估计分组丢失率的方法和装置，包括计算在时隙结束的时隙中的实际分组丢失率，估计后续时隙的平均分组丢失率，估计随后的分组丢失率的方差时隙并估计后续时隙的丢包率。一种用于动态地分配用于视频多播的可用带宽的方法和装置，包括选择帧内速率，确定分组丢失率阈值，接收用户拓扑信息，为每个用户接收信道条件，确定用于编码的最佳操作点，以及在随后的时隙中发送视频帧，适应动态量化参数和前向纠错码率，使用量化参数对视频帧进行编码，并将具有前向纠错码率的前向纠错码应用于视频帧的数据分组，生成前向纠错数据包。

2. 发明申请

US20100226262A1 Adaptive Joint Source and Channel Coding Scheme for H.264 Video Multicasting Over Wireless Networks 有权
标题翻译：通过无线网络的H.264视频组播的自适应联合源和信道编码方案
公开(公告)号：US20100226262A1
公开(公告)日：2010-09-09
申请号：US12086458
申请日：2005-12-15
申请人： Zhengye Liu , Hang Liu , Yao Wang
发明人： Zhengye Liu , Hang Liu , Yao Wang
IPC分类号： H04L12/26 , H04H20/71
CPC分类号： H04N21/8451 , H04N21/2383 , H04N21/2385 , H04N21/2402 , H04N21/2662 , H04N21/44209 , H04N21/6405 , H04N21/658
摘要： A method and apparatus for estimating packet loss rate are described including calculating a real packet loss rate in a time slot at the end of the time slot, estimating average packet loss rate for a subsequent time slot, estimating variance of packet loss rate for the subsequent time slot and estimating the packet loss rate for the subsequent time slot. A method and apparatus and also described for dynamically allocating available bandwidth for video multicast including selecting an intra-frame rate, determining a packet loss rate threshold, receiving user topology information, receiving channel conditions for each user, determining an optimal operation point for encoding and transmitting video frames in a subsequent time slot, adapting dynamically quantization parameters and a forward error correction code rate, encoding the video frames using the quantization parameters and applying forward error correction code with the forward error correction code rate to data packets of the video frames to generate forward error correction packets.
摘要翻译：描述了一种用于估计分组丢失率的方法和装置，包括计算在时隙结束的时隙中的实际分组丢失率，估计后续时隙的平均分组丢失率，估计随后的分组丢失率的方差时隙并估计后续时隙的丢包率。一种用于动态地分配用于视频多播的可用带宽的方法和装置，包括选择帧内速率，确定分组丢失率阈值，接收用户拓扑信息，为每个用户接收信道条件，确定用于编码的最佳操作点，以及在随后的时隙中发送视频帧，适应动态量化参数和前向纠错码率，使用量化参数对视频帧进行编码，并将具有前向纠错码率的前向纠错码应用于视频帧的数据分组，生成前向纠错数据包。

3. 发明授权

US09066158B2 Adaptive joint source and channel coding scheme for H.264 video multicasting over wireless networks 有权
标题翻译：通过无线网络进行H.264视频组播的自适应联合源和信道编码方案
公开(公告)号：US09066158B2
公开(公告)日：2015-06-23
申请号：US13297942
申请日：2011-11-16
申请人： Zhengye Liu , Hang Liu , Yao Wang
发明人： Zhengye Liu , Hang Liu , Yao Wang
IPC分类号： H04N21/60 , H04N21/845 , H04N21/2383 , H04N21/2385 , H04N21/24 , H04N21/2662 , H04N21/442 , H04N21/6405 , H04N21/658
CPC分类号： H04N21/8451 , H04N21/2383 , H04N21/2385 , H04N21/2402 , H04N21/2662 , H04N21/44209 , H04N21/6405 , H04N21/658
摘要： An invention is described including calculating a real packet loss rate in a time slot at the end of the time slot, estimating average packet loss rate for a subsequent time slot, estimating variance of packet loss rate for the subsequent time slot and estimating the packet loss rate for the subsequent time slot. An invention is also described for dynamically allocating available bandwidth for video multicast including selecting an intra-frame rate, determining a packet loss rate threshold, receiving user topology information, receiving channel conditions for each user, determining an optimal operation point for encoding and transmitting video frames in a subsequent time slot, adapting dynamically quantization parameters and a forward error correction code rate, encoding the video frames using the quantization parameters and applying forward error correction code with the forward error correction code rate to data packets of the video frames to generate forward error correction packets.
摘要翻译：描述了一种发明，包括计算在时隙结束的时隙中的实际分组丢失率，估计后续时隙的平均分组丢失率，估计随后时隙的分组丢失率的方差，以及估计分组丢失率为后续时段。还描述了一种用于动态分配用于视频多播的可用带宽的发明，包括选择帧内速率，确定分组丢失率阈值，接收用户拓扑信息，为每个用户接收信道条件，确定编码和发送视频的最佳操作点在后续时隙中的帧，适应动态量化参数和前向纠错码率，使用量化参数对视频帧进行编码，并将具有前向纠错码率的前向纠错码应用于视频帧的数据分组以产生向前纠错包。

4. 发明授权

US09661029B2 Wireless peer-to-peer network topology 有权
公开(公告)号：US09661029B2
公开(公告)日：2017-05-23
申请号：US13439982
申请日：2012-04-05
申请人： Osama Lotfallah , Milan Patel , Xavier De Foy , Debashish Purkayastha , Hang Liu , Kamel M. Shaheen
发明人： Osama Lotfallah , Milan Patel , Xavier De Foy , Debashish Purkayastha , Hang Liu , Kamel M. Shaheen
IPC分类号： H04L29/06 , H04W4/00 , H04L12/14 , H04L12/24 , H04W4/02 , H04W92/18
CPC分类号： H04L65/1016 , H04L12/145 , H04L41/0896 , H04L65/80 , H04W4/02 , H04W92/18
摘要： A method and apparatus for generating a topology for wireless peer-to-peer (P2P) networks. A network architecture comprises a traffic optimization service including a traffic optimization server and an adaptor to effect bi-directional translation of a request-response protocol of the traffic optimization service and a signaling protocol of a multimedia network. The traffic optimization server stores information related to wireless communication systems comprising user/location id information including cache proxies, media gateways, and network peers of multiple access networks and cost metric information including maximum bit rate, guaranteed bit rate, storage capacity, CPU capabilities, number of clients serving, battery capabilities, reliability of path, and supported video/audio codec.

5. 发明授权

US09155019B2 Combining bandwidth aware routing with channel selection and switching in a multi-hop wireless home network 有权
标题翻译：将带宽感知路由与多跳无线家庭网络中的信道选择和交换相结合
公开(公告)号：US09155019B2
公开(公告)日：2015-10-06
申请号：US13814868
申请日：2010-08-11
申请人： Mingquan Wu , Hang Liu , Saurabh Mathur
发明人： Mingquan Wu , Hang Liu , Saurabh Mathur
IPC分类号： H04W40/12 , H04W36/06 , H04L12/729 , H04W40/28
CPC分类号： H04W40/12 , H04L45/125 , H04W36/06 , H04W40/28
摘要： A method and apparatus are described including selecting a first route between a source node and a destination node using a bandwidth-aware routing protocol, determining if the selected first route satisfies a bandwidth requirement of an application of the source node, initiating a switch to a new channel selected from a back-up channel list if the bandwidth requirement of the application is not satisfied by the selected route, selecting a second route over the new channel using the bandwidth-aware routing protocol, determining if the selected second route over the new channel satisfies the bandwidth requirement of the application of the source node and streaming data from the source node to the destination node if the selected first route satisfies the bandwidth requirement of the application or if the selected second route over the new channel satisfies the bandwidth requirement of the application.
摘要翻译：描述了一种方法和装置，其包括使用带宽感知路由协议选择源节点和目的地节点之间的第一路由，确定所选择的第一路由是否满足源节点的应用的带宽需求，发起切换到如果所选择的路由不满足应用的带宽需求，则从备用频道列表中选择新的频道，通过使用带宽感知路由协议在新频道上选择第二路由，确定所选新的第二路由如果所选择的第一路由满足应用的带宽需求，或者如果新信道上所选择的第二路由满足带宽要求，则满足源节点应用的带宽需求和从源节点到目的节点的流数据应用程序。

6. 发明授权

US08826102B2 Method and system for adapting forward error correction in multicast over wireless networks 有权
标题翻译：用于通过无线网络适应多播中的前向纠错的方法和系统
公开(公告)号：US08826102B2
公开(公告)日：2014-09-02
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 , H04L1/00 , H03M13/35 , H03M13/25
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。

7. 发明授权

US08767732B2 Method and apparatus for sub-channel and power allocation among multicast sessions of a multicast system using an orthogonal frequency division multiple access scheme 有权
标题翻译：使用正交频分多址方案的组播系统的组播会话之间的子信道和功率分配的方法和装置
公开(公告)号：US08767732B2
公开(公告)日：2014-07-01
申请号：US13138530
申请日：2009-03-05
申请人： Mingquan Wu , Hang Liu , Saurabh Mathur , Kagan Bakanoglu
发明人： Mingquan Wu , Hang Liu , Saurabh Mathur , Kagan Bakanoglu
IPC分类号： H04L12/28 , H04L12/56 , H04L12/18 , H04L29/06
CPC分类号： H04L47/806 , H04L5/0037 , H04L5/0046 , H04L5/0064 , H04L12/1881 , H04L47/15 , H04L65/4076
摘要： A method and apparatus are described including assigning sub-channels to different multicast sessions under the assumption that in each session all sub-channels are allocated to all users of that session and power is equally allocated to each sub-channel, then for each session assigning the sub-channels to the users of that session under the assumption that the same amount of power is allocated to each sub-channel, then allocating remaining power to certain sub-channels within the session to increase multicast rate, finally modifying the sub-channel allocations among the multicast sessions depending on the sub-channel and power allocation within each multicast session.
摘要翻译：描述了一种方法和装置，其包括将子信道分配给不同的多播会话，假设在每个会话中，所有子信道被分配给该会话的所有用户，并且功率被均等地分配给每个子信道，则对于每个会话分配在对每个子信道分配相同数量的功率的前提下，向该用户的用户分配子信道，然后向会话内的某些子信道分配剩余电力以增加组播速率，最后修改子信道根据每个多播会话中的子信道和功率分配，多播会话之间的分配。

8. 发明申请

US20140115037A1 METHOD AND APPARATUS FOR AUTOMATICALLY DISCOVERING AND RETRIEVING CONTENT BASED ON CONTENT IDENTITY 审中-公开
标题翻译：基于内容识别自动发现和检索内容的方法和装置
公开(公告)号：US20140115037A1
公开(公告)日：2014-04-24
申请号：US13978103
申请日：2012-01-25
申请人： Hang Liu , Xavier DeFoy , Osama Lotfallah , Debashish Purkayastha , Robert G. Gazda , Serhad Doken
发明人： Hang Liu , Xavier DeFoy , Osama Lotfallah , Debashish Purkayastha , Robert G. Gazda , Serhad Doken
IPC分类号： H04L29/06
CPC分类号： H04L67/42 , H04L65/1006 , H04L65/1016 , H04L65/1069 , H04L65/80 , H04L67/2838
摘要： A method and apparatus for automatically discovering and retrieving content based on a content identity (ID) are disclosed. User agents and content control entities in the network interact for registering the content, discovering the content hosts and sources, and initiating and controlling the content session. A content name resolution handler (CNRH) is provided for mapping content IDs to network locations or addresses. Two or more content service provider networks may interconnect each other to discover and retrieve the content. A content request from a client device includes a content ID that uniquely identifies a content object. The content ID is resolved with a CNRH to obtain identity information of at least one content provider for serving the content request, and the content request is forwarded to the selected content provider. The content request may be routed to the selected content provider via IP multimedia subsystem (IMS) control plane entities.
摘要翻译：公开了一种基于内容标识（ID）自动发现和检索内容的方法和装置。网络中的用户代理和内容控制实体交互用于注册内容，发现内容主机和源，以及启动和控制内容会话。提供内容名称解析处理程序（CNRH）用于将内容ID映射到网络位置或地址。两个或多个内容服务提供商网络可以彼此互连以发现和检索内容。来自客户端设备的内容请求包括唯一地标识内容对象的内容ID。使用CNRH解析内容ID，以获得用于服务该内容请求的至少一个内容提供者的身份信息，并将该内容请求转发到所选择的内容提供商。内容请求可以经由IP多媒体子系统（IMS）控制平面实体路由到所选择的内容提供商。

9. 发明授权

US08588115B2 Apparatus for controlling channel switching in wireless networks 有权
标题翻译：用于控制无线网络中的信道切换的装置
公开(公告)号：US08588115B2
公开(公告)日：2013-11-19
申请号：US12087557
申请日：2006-12-19
申请人： Wen Gao , Hang Liu
发明人： Wen Gao , Hang Liu
IPC分类号： H04B7/00 , G08C17/00 , H04W4/00 , H04J3/06
CPC分类号： H04W72/085 , H04W16/14
摘要： The invention provides apparatus methods for avoiding channel collisions in Wireless Regional Area Networks (WRAN), A medium access controller (MAC) for switching a base station (BS) of a WRAN from a first channel to a second channel at a time t is provided. The MAC includes a switch time delay circuit for delaying said switching with respect to time t by a random delay time.
摘要翻译：本发明提供了一种用于避免无线区域网络（WRAN）中的信道冲突的装置方法，提供了一种用于在时间t将WRAN的基站（BS）从第一信道切换到第二信道的媒体接入控制器（MAC）。 MAC包括用于将所述相对于时间t的切换延迟随机延迟时间的开关时间延迟电路。

10. 发明授权

US08537730B2 Method and apparatus for sensing channel availability in wireless networks 有权
标题翻译：用于感测无线网络中信道可用性的方法和装置
公开(公告)号：US08537730B2
公开(公告)日：2013-09-17
申请号：US12224537
申请日：2006-03-01
申请人： Hang Liu , Wen Gao
发明人： Hang Liu , Wen Gao
IPC分类号： H04B7/00
CPC分类号： H04B10/0771 , H04B2210/077
摘要： A method and apparatus for sensing channel availability in a wireless network are described including switching to a first candidate channel for operational data transmission and reception sensing a previous operating channel for availability, determining if the previous operating channel is available, switching back to the previous operating channel if the previous operating channel is available and one of continuing to use the candidate channel for operational data transmission and reception and immediately switching to a second candidate channel for operational data transmission and reception and switching to the second candidate channel for operational data transmission and reception after a pre-determined period of time. Also described is a system for sensing channel availability in a cognitive network including an RF unit, for switching channels, a sensing unit for sensing channel availability and a media access control unit for controlling the sensing unit and the RF unit.
摘要翻译：描述了一种用于感测无线网络中的信道可用性的方法和装置，包括切换到用于操作数据传输和接收的第一候选信道，感测先前的操作信道的可用性，确定先前的操作信道是否可用，切换回先前的操作如果先前的操作信道可用并且继续使用用于操作数据发送和接收的候选信道，并立即切换到用于操作数据发送和接收的第二候选信道，并切换到用于操作数据发送和接收的第二候选信道经过预定的时间段。还描述了一种用于感知认知网络中的信道可用性的系统，包括用于切换信道的RF单元，用于感测信道可用性的感测单元和用于控制感测单元和RF单元的媒体访问控制单元。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式