公开(公告)号：US08730930B2

公开(公告)日：2014-05-20

申请号：US13181112

申请日：2011-07-12

申请人： Peyush Agarwal ,  Joachim S. Hammerschmidt ,  Yasantha N. Rajakarunanayake ,  Praveen K. Gopala ,  George Kondylis

发明人： Peyush Agarwal ,  Joachim S. Hammerschmidt ,  Yasantha N. Rajakarunanayake ,  Praveen K. Gopala ,  George Kondylis

IPC分类号： H04W4/00 ,  H04W72/12

CPC分类号： H04W72/1242 ,  H04W72/0446 ,  H04W72/0486 ,  H04W72/12 ,  H04W72/1252 ,  H04W72/1268 ,  H04W72/1278 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164

摘要： Polling using B-ACK for occasional back-channel traffic in VoWIFI applications. Within wireless communication systems having a relatively asymmetric channel (e.g., relative more downstream traffic than upstream), certain upstream communications (e.g., acknowledgments (ACKs) and/or block acknowledgments (B-ACKs)) include indication therein (e.g., piggybacked therein) that a given downstream located communication device desires/needs to make upstream communication. In some instances, specificity is also provided therein to indicate the type of information to be transmitted upstream. Such a communication protocol mitigates (or eliminates) contention between upstream and downstream traffic in an environment with significantly more downstream traffic (e.g., such as ongoing downstream traffic that may include streaming video). A coordinating device (e.g., access point (AP)) may employ such upstream provided indicia to coordinate upstream and downstream communications within the wireless communication system in a non-contentious manner that does not deleteriously affect ongoing downstream traffic.

摘要翻译： 在VoWIFI应用中轮询使用B-ACK偶尔的反向通道流量。 在具有相对不对称的信道（例如，比上游的相对较多的下游业务）的无线通信系统中，某些上行通信（例如，确认（ACK）和/或块确认（B-ACK））包括其中的指示（例如， 给定的下游定位通信设备希望/需要进行上游通信。 在某些情况下，还提供了特异性以指示要在上游传输的信息的类型。 这样的通信协议减轻（或消除）在具有明显更多的下游业务（例如，诸如可能包括流视频的正在进行的下行业务）的环境中的上游和下游业务之间的争用。 协调设备（例如，接入点（AP））可以使用这种上游提供的标记来以无争议的方式来协调无线通信系统内的上游和下游通信，该方式不会有害地影响正在进行的下行业务。

公开(公告)号：US20120307814A1

公开(公告)日：2012-12-06

申请号：US13181112

申请日：2011-07-12

申请人： Peyush Agarwal ,  Joachim S. Hammerschmidt ,  Yasantha N. Rajakarunanayake ,  Praveen K. Gopala ,  George Kondylis

发明人： Peyush Agarwal ,  Joachim S. Hammerschmidt ,  Yasantha N. Rajakarunanayake ,  Praveen K. Gopala ,  George Kondylis

IPC分类号： H04W84/02

CPC分类号： H04W72/1242 ,  H04W72/0446 ,  H04W72/0486 ,  H04W72/12 ,  H04W72/1252 ,  H04W72/1268 ,  H04W72/1278 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164

摘要： Polling using B-ACK for occasional back-channel traffic in VoWIFI applications. Within wireless communication systems having a relatively asymmetric channel (e.g., relative more downstream traffic than upstream), certain upstream communications (e.g., acknowledgments (ACKs) and/or block acknowledgments (B-ACKs)) include indication therein (e.g., piggybacked therein) that a given downstream located communication device desires/needs to make upstream communication. In some instances, specificity is also provided therein to indicate the type of information to be transmitted upstream. Such a communication protocol mitigates (or eliminates) contention between upstream and downstream traffic in an environment with significantly more downstream traffic (e.g., such as ongoing downstream traffic that may include streaming video). A coordinating device (e.g., access point (AP)) may employ such upstream provided indicia to coordinate upstream and downstream communications within the wireless communication system in a non-contentious manner that does not deleteriously affect ongoing downstream traffic.

摘要翻译： 在VoWIFI应用中轮询使用B-ACK偶尔的反向通道流量。 在具有相对不对称的信道（例如，比上游的相对较多的下游业务）的无线通信系统中，某些上行通信（例如，确认（ACK）和/或块确认（B-ACK））包括其中的指示（例如， 给定的下游定位通信设备希望/需要进行上游通信。 在某些情况下，还提供了特异性以指示要在上游传输的信息的类型。 这样的通信协议减轻（或消除）在具有明显更多的下游业务（例如，诸如可能包括流视频的正在进行的下行业务）的环境中的上游和下游业务之间的争用。 协调设备（例如，接入点（AP））可以使用这种上游提供的标记来以无争议的方式来协调无线通信系统内的上游和下游通信，该方式不会有害地影响正在进行的下行业务。

公开(公告)号：US20120307746A1

公开(公告)日：2012-12-06

申请号：US13231402

申请日：2011-09-13

申请人： Joachim S. Hammerschmidt ,  Peyush Agarwal ,  Yasantha N. Rajakarunanayake ,  Praveen K. Gopala ,  Alexander G. MacInnis

发明人： Joachim S. Hammerschmidt ,  Peyush Agarwal ,  Yasantha N. Rajakarunanayake ,  Praveen K. Gopala ,  Alexander G. MacInnis

IPC分类号： H04W72/04

CPC分类号： H04W72/1242 ,  H04W72/0446 ,  H04W72/0486 ,  H04W72/12 ,  H04W72/1252 ,  H04W72/1268 ,  H04W72/1278 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164

摘要： A wireless access device transmits encoded media streams to at least first and second clients over a shared wireless channel. First and second transmission windows are established in a transmission frame interval for transmission of media packets to the first and second clients, respectively. An unused portion of one of the transmission windows is identified using, for example, transmission status information (from the wireless access device) associated with the media packets. The unused portion of the transmission window is adaptively reallocated for use in transmission of media packets associated with the other transmission window. In one mode of operation, the reallocation process may trigger a reversal in the order of the first and second transmission windows in subsequent transmission frame intervals.

摘要翻译： 无线接入设备通过共享无线信道将编码的媒体流发送到至少第一和第二客户端。 以传输帧间隔建立第一和第二传输窗口，以分别将媒体分组传输到第一和第二客户机。 使用例如与媒体分组相关联的来自无线接入设备的传输状态信息来识别传输窗口之一的未使用部分。 传输窗口的未使用部分被自适应地重新分配用于传输与另一个传输窗口相关联的媒体分组。 在一种操作模式中，重新分配过程可以在随后的传输帧间隔中触发第一和第二传输窗口的顺序的反转。

公开(公告)号：US20120311173A1

公开(公告)日：2012-12-06

申请号：US13223250

申请日：2011-08-31

申请人： Peyush Agarwal ,  Yasantha N. Rajakarunanayake ,  Joachim S. Hammerschmidt

发明人： Peyush Agarwal ,  Yasantha N. Rajakarunanayake ,  Joachim S. Hammerschmidt

IPC分类号： G06F15/16

CPC分类号： H04W28/20 ,  H04L1/188 ,  H04L41/0896 ,  H04L43/0829 ,  H04L43/0852 ,  H04L43/16 ,  H04W36/18 ,  H04W36/24 ,  H04W36/30 ,  Y04S40/162 ,  Y04S40/168

摘要： Dynamic wireless channel selection and protocol control for streaming video utilizing transmission delay/packet loss information and channel utilization statistics. A transmission delay and packet loss monitor generates transmission delay information during the transmission of a video stream to remote wireless device(s) over a first wireless channel by timestamping and monitoring video packet(s) and associated transmission acknowledgement(s). The transmission delay information is compared to a predetermined threshold (e.g., a maximum tolerated delay threshold and/or total packet loss threshold) and, if the threshold is exceeded, a second wireless channel is selected for continued transmission of the video stream. In one mode, channel utilization statistics are likewise examined prior to a channel relocation event. Selection of the second wireless channel may be accomplished through a random or semi-random channel selection process, or through active scanning to collect clear channel assessment statistics for candidate channels. In another mode, at least one transmission protocol parameter is altered in response to a violation of one or more of the predetermined thresholds.

摘要翻译： 使用传输延迟/丢包信息和信道利用率统计的流媒体视频的动态无线信道选择和协议控制。 传输延迟和分组丢失监视器在通过时间戳和监视视频分组和相关联的传输确认在第一无线信道的视频流传输到远程无线设备期间产生传输延迟信息。 将传输延迟信息与预定阈值（例如，最大允许延迟阈值和/或总分组丢失阈值）进行比较，并且如果超过阈值，则选择第二无线信道用于视频流的继续传输。 在一种模式中，信道利用统计信息同样在信道重定位事件之前进行检查。 第二无线信道的选择可以通过随机或半随机信道选择过程或通过主动扫描来完成，以收集候选信道的清晰信道评估统计信息。 在另一模式中，响应于违反一个或多个预定阈值来改变至少一个传输协议参数。

公开(公告)号：US20120309321A1

公开(公告)日：2012-12-06

申请号：US13180843

申请日：2011-07-12

申请人： Peyush Agarwal ,  Joachim S. Hammerschmidt ,  Yasantha N. Rajakarunanayake

发明人： Peyush Agarwal ,  Joachim S. Hammerschmidt ,  Yasantha N. Rajakarunanayake

IPC分类号： H04B17/00

CPC分类号： H04W72/1242 ,  H04W72/0446 ,  H04W72/0486 ,  H04W72/12 ,  H04W72/1252 ,  H04W72/1268 ,  H04W72/1278 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164

摘要： Synchronized calibration for wireless communication devices. A protocol is presented herein that allows for calibration operation(s) by one or more wireless communication devices to mitigate (or eliminate) the disruption caused to the communication medium thereby. A calibration announcement frame is provided by a wireless communication device intending to perform calibration operation(s), and respective receiving wireless communication devices may adaptively determine whether to perform a calibration operation based thereon. In response to a calibration announcement frame, one or more other wireless communication devices may also perform calibration operation(s) (e.g., in accordance with a group calibration event, simultaneously, etc.) or may perform some operations as to minimize any effects that may be incurred during such a calibration operation(s) (e.g., enter into some robust operational mode, power savings mode, etc.). Such a calibration announcement frame may indicate respective time slots (e.g., maintenance window) during which respective wireless communication devices may perform calibration operation(s).

摘要翻译： 无线通信设备的同步校准。 这里呈现允许一个或多个无线通信设备进行校准操作以减轻（或消除）由此导致的对通信介质的中断的协议。 校准通知帧由旨在执行校准操作的无线通信设备提供，并且各个接收无线通信设备可以基于此自适应地确定是否执行校准操作。 响应于校准公告帧，一个或多个其他无线通信设备还可以执行校准操作（例如，根据组校准事件，同时等等），或者可以执行一些操作，以使得 可能在这样的校准操作期间发生（例如，进入一些鲁棒的操作模式，省电模式等）。 这样的校准公告帧可以指示相应的无线通信设备可执行校准操作的各个时隙（例如，维护窗口）。

公开(公告)号：US08831091B2

公开(公告)日：2014-09-09

申请号：US13231481

申请日：2011-09-13

申请人： Alexander G. MacInnis ,  Peyush Agarwal ,  Yasantha N. Rajakarunanayake

发明人： Alexander G. MacInnis ,  Peyush Agarwal ,  Yasantha N. Rajakarunanayake

IPC分类号： H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04W72/12 ,  H04W72/04

CPC分类号： H04W72/1242 ,  H04W72/0446 ,  H04W72/0486 ,  H04W72/12 ,  H04W72/1252 ,  H04W72/1268 ,  H04W72/1278 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164

摘要： Adaptive wireless channel allocation in a multi-user environment based on quality of received video streams. During the transmission of encoded media streams from a wireless access device to at least first and second video devices over a wireless channel, transmission windows are allocated in shared transmission frame intervals for transmission of media packets to the first and second video devices, respectively. Relative priorities are set/adjusted for the video devices based, at least in part, on one or more of the following: channel estimation information, reception characteristics, transmission acknowledgment information, video device characteristics and/or user feedback. The relative priorities are utilized to adaptively (re)allocate at least one portion of the transmission frame intervals. In addition to channel reallocation, the prioritization of devices may be utilized to adaptively alter the encoding bit rate of one or more media streams.

摘要翻译： 基于接收到的视频流的质量，在多用户环境中进行自适应无线信道分配。 在通过无线信道将编码媒体流从无线接入设备传送到至少第一和第二视频设备的过程中，传输窗口分配在共享的传输帧间隔中，用于分别向第一和第二视频设备传送媒体分组。 至少部分地基于以下中的一个或多个来为视频设备设置/调整相对优先级：信道估计信息，接收特性，发送确认信息，视频设备特征和/或用户反馈。 利用相对优先级来自适应（重新）分配传输帧间隔的至少一部分。 除了信道重分配之外，可以利用设备的优先级来自适应地改变一个或多个媒体流的编码比特率。

公开(公告)号：US20110314506A1

公开(公告)日：2011-12-22

申请号：US13220571

申请日：2011-08-29

申请人： Peyush Agarwal ,  Yasantha N. Rajakarunanayake ,  Alexander G. MacInnis ,  James D. Bennett ,  William S. Bunch ,  James F. Dougherty, III

发明人： Peyush Agarwal ,  Yasantha N. Rajakarunanayake ,  Alexander G. MacInnis ,  James D. Bennett ,  William S. Bunch ,  James F. Dougherty, III

IPC分类号： H04N7/16

CPC分类号： H04L1/1607 ,  H04L65/80 ,  H04L2001/0093 ,  H04N7/17318 ,  H04N21/43637 ,  H04N21/47202 ,  H04N21/6125 ,  H04N21/6375

摘要： Point to multi-point wireless video delivery. Among a group of receiver wireless communication devices (RXs), one is designated (e.g., as acknowledgment (ACK) leader). Media delivery operational parameters are selected based on the designated RX or based on all or a subset of the RXs. For simultaneous media delivery to multiple RXs, characteristics associated with the designated RX [or all, or a subset or RXs] govern the manner by which communications are made. Different respective RXs may be designated to serve in this role at different times. Wireless delivery of media (e.g., video signaling, audio signaling, etc.) to a group of RXs is effectuated in accordance with modified multicast signaling with a designated leader (e.g., ACK leader). Among a group of devices, a least successful receiving device that still receives media at an acceptable level may be chosen as the designated leader (e.g., ACK leader).

摘要翻译： 指向多点无线视频传送。 在一组接收机无线通信设备（RX）中，一个被指定（例如，作为确认（ACK）引导者）。 基于指定的RX或基于RX的全部或一个子集来选择媒体传送操作参数。 对于同时传送到多个RX的媒体，与指定的RX [或全部或子集或RXs]相关联的特征管理进行通信的方式。 可以将不同的各个RX指定为在不同时间处于该角色。 根据与指定的领导（例如，ACK领导者）的修改的多播信令，实现媒体（例如，视频信令，音频信令等）到一组RX的无线传送。 在一组设备中，可以选择仍然以可接受的级别接收媒体的最不成功的接收设备作为指定的领导者（例如，ACK领导者）。

公开(公告)号：US09049736B2

公开(公告)日：2015-06-02

申请号：US13192390

申请日：2011-07-27

申请人： Peyush Agarwal ,  James F. Dougherty, III ,  Yasantha N. Rajakarunanayake

发明人： Peyush Agarwal ,  James F. Dougherty, III ,  Yasantha N. Rajakarunanayake

IPC分类号： H04W72/12 ,  H04W72/04

CPC分类号： H04W72/1242 ,  H04W72/0446 ,  H04W72/0486 ,  H04W72/12 ,  H04W72/1252 ,  H04W72/1268 ,  H04W72/1278 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164

摘要： Video sub-reservation protocol in a wireless ecosystem. Appropriate access is provided to a number of wireless communication devices to ensure very high performance and a high perceptual user experience with respect to media related content communications. Access to the communication medium (e.g., air within a wireless location system) is provided to various wireless communication devices in a manner as to minimize collisions and contention. In one instance, different respective access assignment periods are sub-divided to give respective communication medium access to various devices within the system. Such sub-reservation may be adaptive in response to any of a number of considerations (e.g., traffic, device processing history, etc.). Also, such sub-reservation may provide respective time specificity at or during which certain devices may conduct communications, but may also specify any other operational parameters (e.g., which frequency spectra to use, duration of such communications, modulation coding set (MCS) to use, etc.).

公开(公告)号：US20120310531A1

公开(公告)日：2012-12-06

申请号：US13183613

申请日：2011-07-15

申请人： Peyush Agarwal ,  Yasantha N. Rajakarunanayake

发明人： Peyush Agarwal ,  Yasantha N. Rajakarunanayake

IPC分类号： G01C21/00

CPC分类号： H04W72/1242 ,  H04W72/0446 ,  H04W72/0486 ,  H04W72/12 ,  H04W72/1252 ,  H04W72/1268 ,  H04W72/1278 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164

摘要： Navigation system employing augmented labeling and/or indicia. Various embodiments provide very accurate and timely information to a user thereby minimizing the amount of time or effort that a user will need to interpret or translate any information and/or directions provided thereby. In one instance, a vehicular based navigational system, which can operate with one or more projectors, provides information to a user such that the user need not turn away from the actual field of vision (e.g., 3D, 2D, etc.). Labeling and/or indicia is/are projected within the actual field of vision of the navigation system user. In another instance, labeling and/or indicia are overlaid or included within photographic and/or video information corresponding to an environment depicted by the navigation system. Such a navigation system may be implemented within a variety of contexts including within a vehicle, within a handheld/portable device, within a headset/eyeglasses device, etc.

摘要翻译： 使用增强标签和/或标记的导航系统。 各种实施例向用户提供非常准确和及时的信息，从而最小化用户需要解释或翻译由此提供的任何信息和/或方向所需的时间或努力的量。 在一种情况下，可以与一个或多个投影仪一起操作的基于车辆的导航系统向用户提供信息，使得用户不需要离开实际的视野（例如，3D，2D等）。 标签和/或标记被投射在导航系统用户的实际视野内。 在另一个实例中，标签和/或标记被覆盖或包括在与由导航系统描绘的环境相对应的照相和/或视频信息内。 这样的导航系统可以在包括车内，手持式/便携式设备内，耳机/眼镜装置等内的各种情况下实现。

公开(公告)号：US20120307886A1

公开(公告)日：2012-12-06

申请号：US13244584

申请日：2011-09-25

申请人： Peyush Agarwal ,  James F. Dougherty, III ,  Yasantha N. Rajakarunanayake ,  Alexander G. MacInnis ,  James D. Bennett

发明人： Peyush Agarwal ,  James F. Dougherty, III ,  Yasantha N. Rajakarunanayake ,  Alexander G. MacInnis ,  James D. Bennett

IPC分类号： H04N7/26

CPC分类号： H04W88/181 ,  H04L1/0014 ,  H04L1/0015 ,  H04L1/0026 ,  H04L1/0034 ,  H04L1/0035 ,  H04W4/18

摘要： Adaptive video encoding based on predicted wireless channel conditions. Based on at least one of a number of transmitter side indications of the available throughput of a wireless channel for video delivery, an encoder rate adaptation mechanism generates an estimate of the supportable throughput of the wireless channel under different operating conditions. An encoding parameter, such as encoder bit rate, is subsequently altered based on the estimated throughput value. In one instance, transmitter side throughput indicia is used to generate target encoder bit rates for multiple potential PHY data rates/channel MCS selections that may be used in video delivery. In anticipation of or immediately following a transition to one such PHY data rate/MCS selection, the encoder bit rate is altered in accordance with an associated target bit rate. In another mode, average transmit queue latency information is used to further regulate the encoder bit rate.

摘要翻译： 基于预测的无线信道条件的自适应视频编码。 基于用于视频传送的无线信道的可用吞吐量的多个发射机侧指示中的至少一个，编码器速率适配机制在不同的操作条件下生成对无线信道的可支持吞吐量的估计。 随后根据估计的吞吐量值改变诸如编码器比特率的编码参数。 在一种情况下，发射机侧吞吐量标记用于生成可用于视频传送中的多个潜在PHY数据速率/信道MCS选择的目标编码器比特率。 在预期或紧接着转换到一个这样的PHY数据速率/ MCS选择之后，编码器比特率根据相关联的目标比特率被改变。 在另一种模式下，平均传输队列等待时间信息用于进一步调节编码器比特率。