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公开(公告)号：US11846714B2
公开(公告)日：2023-12-19
申请号：US17399602
申请日：2021-08-11
发明人： Min Wang
CPC分类号： G01S19/44 , G01S19/072 , G01S19/393
摘要： Embodiments described herein provide for enabling a mobile device comprising a GNSS receiver to implement a modified PPP technique that utilizes orbit and clock information of a satellite that is broadcast from the satellite. In particular, embodiments may utilize a positioning engine to perform PPP error mitigation with respect to various error sources (e.g., troposphere, ionosphere, phase windup, etc.). With regard to errors stemming from satellite orbit and satellite clock, embodiments may utilize orbit and clock information from broadcast ephemeris data rather than obtaining precise orbit and clock information (e.g., from a third party provider). Further, embodiments may account for errors in this broadcast information by adjusting the ambiguity dynamic and/or ambiguity estimate term used by the positioning engine. This can enable the positioning engine to determine a solution more accurate than traditional GNSS without resetting.
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公开(公告)号：US11811842B2
公开(公告)日：2023-11-07
申请号：US17361700
申请日：2021-06-29
CPC分类号： H04L65/80 , H04L65/40 , H04L65/762 , H04W28/0268 , H04W28/04 , H04W80/06
摘要： Various embodiments may provide streaming service downlink assistance and/or uplink assistance mechanisms for a wireless device using attention (AT) commands exchanged between a modem processor of the wireless device and another processor of the wireless device. Various embodiments may include an AT command that is a bitrate recommendation action command including an indication of a stream identifier, an indication of a requested bitrate, and an indication of a direction. Various embodiments may include an AT response that is a bitrate recommendation response, the bitrate recommendation response including an indication of a stream identifier, an indication of a bitrate recommendation, and an indication of a direction.
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公开(公告)号：US20220014581A1
公开(公告)日：2022-01-13
申请号：US17361700
申请日：2021-06-29
摘要： Various embodiments may provide streaming service downlink assistance and/or uplink assistance mechanisms for a wireless device using attention (AT) commands exchanged between a modem processor of the wireless device and another processor of the wireless device. Various embodiments may include an AT command that is a bitrate recommendation action command including an indication of a stream identifier, an indication of a requested bitrate, and an indication of a direction. Various embodiments may include an AT response that is a bitrate recommendation response, the bitrate recommendation response including an indication of a stream identifier, an indication of a bitrate recommendation, and an indication of a direction.
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公开(公告)号：US20200382832A1
公开(公告)日：2020-12-03
申请号：US16428565
申请日：2019-05-31
IPC分类号： H04N21/44 , H04N21/434 , H04L29/06
摘要： Methods, systems, and devices for video frame rendering are described. A device, such as a user equipment (UE) may receive a set of video packets over a video connection (e.g., a video telephone service) and generate a set of video frames based on the set of video packets. The device may determine to render a video frame of the set of video frames based on a frame type of the video frame or a rendering criteria including a video quality of the video frame, or both. In some examples, the frame type may include a perfect frame or a corrupted frame. The device may render the video frame of the set of video frames based on the frame type of the video frame or the video frame satisfying the rendering criteria, or both, and output the rendered video frame for display.
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公开(公告)号：US20150049248A1
公开(公告)日：2015-02-19
申请号：US14262994
申请日：2014-04-28
发明人： Min Wang , Tien-Hsin Lee , Shankar Genesh LakshmanaSwamy , Andy Yu , Vikram Singh , Sandeep Padubidri Ramamurthy , Yau Mo Chan , Vasudev Sujir Nayak , Srinivasan Balasubramanian
CPC分类号： H04L65/602 , H04J3/00 , H04L65/607 , H04L65/608 , H04L69/28 , H04N5/04 , H04N21/6437 , H04N21/8547
摘要： Methods, systems, and devices are described for media synchronization. Multi-stream media processes may include media streams captured with respect to different clock rates. Multi-processor implementations may involve separate clocks associated with different media streams, such as audio and video, respectively. The separate clocks may tend to drift from one another, becoming further out of sync as time passes. Selecting a reference time of one of the processors to function as a “wall clock,” recording frame capture times with respect to the reference time, accounting for propagation delays, and transmitting frame capture times in terms of the reference time may aid in AV synchronization at a device where audio and video streams are received.
摘要翻译： 描述了媒体同步的方法，系统和设备。 多流媒体处理可以包括关于不同时钟速率捕获的媒体流。 多处理器实现可以分别涉及与不同媒体流（例如音频和视频）相关联的单独的时钟。 单独的时钟可能趋向于彼此漂移，随着时间的过去而变得更加不同步。 选择其中一个处理器作为“挂钟”的参考时间，相对于参考时间记录帧捕获时间，考虑传播延迟和根据参考时间传输帧捕获时间可以有助于AV同步 在接收音频和视频流的设备上。
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公开(公告)号：US12130369B2
公开(公告)日：2024-10-29
申请号：US17313486
申请日：2021-05-06
发明人： Min Wang , Ning Luo , Gengsheng Zhang , Zoltan Biacs , Mangesh Chansarkar , Jean-Michel Rousseau , Dimitri Rubin , David Tuck , Yuxiang Peng
摘要： Techniques for Ultra Wide-Lane (UWL) Real-Time Kinematic (RTK) positioning a mobile device may include obtaining, using a multi-band GNSS receiver of the mobile device: a first carrier-phase measurement of a first GNSS signal on a first GNSS carrier frequency, and a second carrier-phase measurement of a second GNSS signal on second GNSS carrier frequency. Techniques may further comprise providing a position estimate of the mobile device, wherein: the position estimate is determined from a wide-lane (WL) combination of the first carrier-phase measurement and the second carrier-phase measurement, and the WL combination has a combined carrier phase noise that is less than a pseudo-range noise of the first carrier-phase measurement and a pseudo-range noise of the second carrier-phase measurement.
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公开(公告)号：US11892545B2
公开(公告)日：2024-02-06
申请号：US17238730
申请日：2021-04-23
发明人： Han Zhang , Ning Luo , Gengsheng Zhang , Bo Zheng , Yinghua Yang , Min Wang
CPC分类号： G01S19/215 , G08B21/18
摘要： In an aspect, a user equipment (UE) receives a spoofing alert message from either a server or an internet-of-things (IOT) device that indicates whether a spoofed Global Navigation Satellite System (GNSS) condition is present. Based on determining that the spoofing alert message indicates that a spoofed GNSS condition is present, the UE determines, based on the spoofing alert message, a location of a spoofer broadcasting a spoofed GNSS signal, determines, based on the location of the spoofer and a current location of the UE, that the UE is within a receiving area of the spoofed GNSS signal, and determines a position of the UE without using the spoofed GNSS signal.
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公开(公告)号：US11700559B2
公开(公告)日：2023-07-11
申请号：US17454977
申请日：2021-11-15
发明人： Tom Chin , Ajith Tom Payyappilly , Min Wang , Xipeng Zhu
IPC分类号： H04W36/08 , H04W36/00 , H04L5/00 , H04L25/02 , H04W52/14 , H04W52/36 , H04W56/00 , H04W74/08 , H04W72/23
CPC分类号： H04W36/08 , H04L5/0051 , H04L25/0226 , H04W36/0058 , H04W52/146 , H04W52/367 , H04W56/0045 , H04W72/23 , H04W74/0833
摘要： This disclosure provides systems, methods, and apparatus for wireless communications that support fast user equipment (UE) handover between base stations. A UE may receive, from a source base station, a configuration for reference signal transmission at a set of uplink transmit power levels. The UE may transmit multiple uplink reference signal repetitions based on the configuration. The source base station may transmit a request message to a target base station to measure the multiple uplink reference signal repetitions. The target base station may select an uplink reference signal and measure a transmit power correction. The target base station may transmit an indication to the source base station of the selection and transmit power correction. The source base station may evaluate the indications and select the target base station. The source base station may forward to the indicated contents, and the UE may switch and synchronize with the target base station.
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公开(公告)号：US11686850B2
公开(公告)日：2023-06-27
申请号：US17377255
申请日：2021-07-15
发明人： Min Wang , Ning Luo , Gengsheng Zhang , Kannan Muthuraman
CPC分类号： G01S19/072 , G01S19/40
摘要： Described are methods, systems, and devices for correcting ionospheric error. In some aspects, a mobile device equipped with a Global Navigation Satellite System (GNSS) receiver is configured to determine a positioning measurement of a GNSS signal. The mobile device is further configured to receive augmentation data from an augmentation system. When augmentation data for a current measurement period is unavailable, the mobile device can obtain augmentation data associated with Total Electron Content (TEC) values (e.g., vertical TEC values) during one or more prior measurement periods. Based on the augmentation data associated with TEC values during one or more prior measurement periods and a pierce point of the received GNSS signal, an ionospheric error in the positioning measurement of the GNSS signal can be determined and corrected.
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公开(公告)号：US11668840B2
公开(公告)日：2023-06-06
申请号：US16998612
申请日：2020-08-20
发明人： Min Wang , Mangesh Chansarkar , Ning Luo , Gengsheng Zhang , David Tuck , Bo Zheng , Yinghua Yang , Han Zhang
CPC分类号： G01S19/41 , G01S19/071 , G01S19/072 , G01S19/44
摘要： A Real-Time Kinematic (RTK) solution is provided to mobile devices having multi-constellation, multi-frequency (MCMF) functionality, in which a single base station may have a baseline much farther than traditional base station. To enable this, embodiments account for differences in atmospheric effects between the rover station and base station when determining a GNSS position fix for a mobile device (rover station), allowing for a separate tropospheric delay error for a base station to be determined. Embodiments may use additional satellite measurements for which no RTK correction is available, and may further use orbital clock correction for these additional satellite measurements.
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