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公开(公告)号：US09698962B2
公开(公告)日：2017-07-04
申请号：US14705296
申请日：2015-05-06
CPC分类号： H04L5/14 , H04B7/18506 , H04L5/1469 , H04W56/004 , H04W72/0413 , H04W72/0446 , H04W72/12
摘要： Methods, systems, and devices are described for implementing timing advances in which a propagation delay may exceed a time period of a portion of a radio frame. In some examples, a transmitter may identify a timing advance indicating a time to initiate wireless uplink transmission of a subframe. Such a timing advance may compensate for a propagation delay between the transmitter and a receiver of the wireless uplink transmission. The timing advance may be applied as an integer component and a fractional component in relation to a duration of the subframe, to adjust the time to initiate the wireless uplink transmission of the subframe. The integer component may be used to adjust one or more subframe characteristics, and the fractional component that may be used to adjust the time to initiate the wireless uplink transmission of the subframe.
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公开(公告)号：US20180376393A1
公开(公告)日：2018-12-27
申请号：US16012639
申请日：2018-06-19
发明人： Qiang Wu , Peter John Black , Ruoheng Liu
摘要： A method and apparatus for operating a satellite system including different satellites that may belong to different types of satellite constellations. In some implementations, the satellite system may include a LEO satellite constellation and one or more non-LEO satellite constellations that can be used to increase the forward link capacity of the LEO satellite constellation, for example, by allowing an LEO satellite to offload at least some of its forward link traffic to one of the non-LEO satellites. The user terminals can dynamically switch forward link communications between a LEO satellite and a non-LEO satellite while maintaining a return link connection with the LEO satellite.
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公开(公告)号：US20170265177A1
公开(公告)日：2017-09-14
申请号：US15164765
申请日：2016-05-25
发明人： Ruoheng Liu , Jun Ma , Qiang Wu
CPC分类号： H04W72/0406 , H04B7/185 , H04L1/1854 , H04L1/1861 , H04L5/001 , H04L5/0055 , H04W72/14 , H04W74/085 , H04W84/06 , H04W88/16
摘要： Various aspects of the disclosure relate to allocating control signaling resources for multiple carrier scenarios. In an example implementation, N-to-1 mapping is used between forward link control signaling resource allocation indices (e.g., control channel elements) and return link control signaling resources (e.g., for ACK/NACK signaling) indices in each return link component carrier. A collision between forward link control signaling assignments for different user terminals (UTs) may occur when UT-specific search spaces overlap each other. Such a collision may be avoided, for example, by scheduling different UTs on different return link component carriers, scheduling return link grants instead of forward link grants, or scheduling a different forward link control signaling candidate that is associated with a different forward link control signaling resource allocation index.
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公开(公告)号：US09648504B2
公开(公告)日：2017-05-09
申请号：US14101919
申请日：2013-12-10
发明人： June Namgoong , Srikant Jayaraman , Ruoheng Liu
CPC分类号： H04W16/28 , H04B7/06 , H04B7/0617 , H04B7/068 , H04B7/0691 , H04B7/0695 , H04W88/08
摘要： Methods, systems, and devices are described for transmitting across a broad azimuth using an antenna array. In one example, a method is described that includes forming two subarrays from an antenna array. Beamforming weights are selected for each subarray to cause the radiation patterns to be complementary over a range of the azimuth of a cell. The beamforming weights may be selected according to a recursive relation based on the number of antenna elements in each subarray. Information may be encoded, scrambled, and mapped to modulation symbols. A Space Frequency Block Code (SFBC) such as an Alamouti Code may then be used to form two signals to be transmitted over the two subarrays.
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公开(公告)号：US10575229B2
公开(公告)日：2020-02-25
申请号：US16012639
申请日：2018-06-19
发明人： Qiang Wu , Peter John Black , Ruoheng Liu
IPC分类号： H04W36/08 , H04B7/185 , H04W36/18 , H04W36/36 , H04W36/16 , H04W72/04 , H04B7/195 , H04B7/19 , H04J3/00 , H04L5/14 , H03M13/29 , H04L1/00 , H04L5/26 , H04W36/00 , H04W84/06 , H03M13/15
摘要： A method and apparatus for operating a satellite system including different satellites that may belong to different types of satellite constellations. In some implementations, the satellite system may include a LEO satellite constellation and one or more non-LEO satellite constellations that can be used to increase the forward link capacity of the LEO satellite constellation, for example, by allowing an LEO satellite to offload at least some of its forward link traffic to one of the non-LEO satellites. The user terminals can dynamically switch forward link communications between a LEO satellite and a non-LEO satellite while maintaining a return link connection with the LEO satellite.
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公开(公告)号：US10477520B2
公开(公告)日：2019-11-12
申请号：US15164765
申请日：2016-05-25
发明人： Ruoheng Liu , Jun Ma , Qiang Wu
摘要： Various aspects of the disclosure relate to allocating control signaling resources for multiple carrier scenarios. In an example implementation, N-to-1 mapping is used between forward link control signaling resource allocation indices (e.g., control channel elements) and return link control signaling resources (e.g., for ACK/NACK signaling) indices in each return link component carrier. A collision between forward link control signaling assignments for different user terminals (UTs) may occur when UT-specific search spaces overlap each other. Such a collision may be avoided, for example, by scheduling different UTs on different return link component carriers, scheduling return link grants instead of forward link grants, or scheduling a different forward link control signaling candidate that is associated with a different forward link control signaling resource allocation index.
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公开(公告)号：US09826448B2
公开(公告)日：2017-11-21
申请号：US14329437
申请日：2014-07-11
发明人： Hai Truong Le , Kalyan Kuppuswamy , Srikant Jayaraman , Rajakumar Ebenezar Devairakkam , Ebenezer Pugalenthi Samuel , Ruoheng Liu , Sunil Kumar Kamavaram , Chanakya Malladi
CPC分类号： H04W36/08 , H04B7/18506 , H04W36/0083
摘要： Managing handover procedures of two or more modems from a serving base station to a target base station includes receiving at least one message indicative of at least one measurement report of radio conditions from at least one modem of the two or more modems; determining, based on the at least one message, whether to handover the two or more modems from the serving base station to the target base station; and upon determining to handover the two or more modems from the serving base station to the target base station, indicating to each of the two or more modems to send to the serving base station a measurement report configured to trigger a respective handover procedure from the serving base station to the target base station.
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公开(公告)号：US20150085840A1
公开(公告)日：2015-03-26
申请号：US14461241
申请日：2014-08-15
摘要： A method of wireless communication includes communicating with a base station using a special subframe that extends a guard period over an uplink pilot time slot and one or more disabled, adjacent uplink subframes. The method also includes associating a control information subframe with a specific downlink subframe while accounting for both cell radius extension and loss of the one or more disabled, adjacent uplink subframes used to communicate the extended special subframe.
摘要翻译： 无线通信的方法包括使用在上行链路导频时隙和一个或多个禁用的相邻上行链路子帧上延长保护周期的特殊子帧与基站进行通信。 该方法还包括将控制信息子帧与特定下行链路子帧相关联，同时考虑用于传送扩展专用子帧的一个或多个禁用的相邻上行链路子帧的小区半径扩展和丢失。
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9.发明申请公开(公告)号：US20150085834A1
公开(公告)日：2015-03-26
申请号：US14105106
申请日：2013-12-12
IPC分类号： H04W72/04
摘要： A method of wireless communication includes communicating with a base station using an extended special subframe. Communicating with the base station using the extended special subframe may be performed by disabling an uplink pilot time slot and an adjacent uplink subframe.
摘要翻译： 一种无线通信方法包括使用扩展特殊子帧与基站进行通信。 使用扩展特殊子帧与基站通信可以通过禁止上行链路导频时隙和相邻的上行链路子帧来执行。
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公开(公告)号：US10667188B2
公开(公告)日：2020-05-26
申请号：US16012613
申请日：2018-06-19
发明人： Qiang Wu , Peter John Black , Ruoheng Liu
IPC分类号： H04W36/08 , H04W72/04 , H04W36/36 , H04W36/16 , H04W36/00 , H04B7/185 , H04L5/26 , H04L1/00 , H04L5/14 , H04J3/00 , H03M13/29 , H04W36/18 , H04W84/06 , H04B7/19 , H04B7/195 , H03M13/15
摘要： A method and apparatus for operating a satellite system including different satellites that may belong to different types of satellite constellations. In some implementations, the satellite system may include a LEO satellite constellation and one or more non-LEO satellite constellations that can be used to increase the forward link capacity of the LEO satellite constellation, for example, by allowing an LEO satellite to offload at least some of its forward link traffic to one of the non-LEO satellites. The user terminals can dynamically switch forward link communications between a LEO satellite and a non-LEO satellite while maintaining a return link connection with the LEO satellite.
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