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Patent Agency Ranking
公开(公告)号：US20180376392A1
公开(公告)日：2018-12-27
申请号：US16012613
申请日：2018-06-19
Applicant: QUALCOMM Incorporated
Inventor： Qiang Wu , Peter John Black , Ruoheng Liu
Abstract: 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：US09615344B2
公开(公告)日：2017-04-04
申请号：US14265123
申请日：2014-04-29
Applicant: QUALCOMM Incorporated
Inventor： Ruoheng Liu , June Namgoong , Hai Le , Srikant Jayaraman , Sunil Kamavaram , Rajakumar Ebenezar Devairakkam , Venkatraman Rajagopalan
CPC classification number: H04W56/004 , H04B7/18506 , H04W74/002 , H04W74/004 , H04W74/0833
Abstract: Methods, systems, and devices are described for establishing a wireless communications link at an aircraft terminal (AT). An AT may determine a timing offset based on the propagation delay between the AT and a ground station, which in some cases may be more than 100 kilometers away. The AT may then transmit an initial access message to the ground station based on the determined timing offset. In some embodiments, the AT may receive an access response message from the ground station that includes a timing alignment value and adjust the timing offset based on this value. The AT may transmit a connection message to the ground station that includes AT location information. This information may be used by the ground station to facilitate beamforming.
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公开(公告)号：US20150334707A1
公开(公告)日：2015-11-19
申请号：US14705296
申请日：2015-05-06
Applicant: QUALCOMM Incorporated
Inventor： Venkatraman Rajagopalan , Srikant Jayaraman , Ruoheng Liu , Rajakumar Ebenezar Devairakkam
CPC classification number: H04L5/14 , H04B7/18506 , H04L5/1469 , H04W56/004 , H04W72/0413 , H04W72/0446 , H04W72/12
Abstract: 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.
Abstract translation: 描述了用于实现传播延迟可能超过无线电帧的一部分的时间段的定时进展的方法，系统和设备。 在一些示例中，发射机可以识别指示发起子帧的无线上行链路传输的时间的定时提前。 这样的定时提前可以补偿无线上行链路传输的发射机和接收机之间的传播延迟。 定时提前可以作为与子帧的持续时间有关的整数分量和小数分量来应用，以调整发起子帧的无线上行链路传输的时间。 整数分量可以用于调整一个或多个子帧特性，以及可用于调整发起子帧的无线上行链路传输的时间的分数分量。
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公开(公告)号：US20150181544A1
公开(公告)日：2015-06-25
申请号：US14265123
申请日：2014-04-29
Applicant: QUALCOMM Incorporated
Inventor： Ruoheng Liu , June Namgoong , Hai Le , Srikant Jayaraman , Sunil Kamavaram , Rajakumar Ebenezar Devairakkam , Venkatraman Rajagopalan
CPC classification number: H04W56/004 , H04B7/18506 , H04W74/002 , H04W74/004 , H04W74/0833
Abstract: Methods, systems, and devices are described for establishing a wireless communications link at an aircraft terminal (AT). An AT may determine a timing offset based on the propagation delay between the AT and a ground station, which in some cases may be more than 100 kilometers away. The AT may then transmit an initial access message to the ground station based on the determined timing offset. In some embodiments, the AT may receive an access response message from the ground station that includes a timing alignment value and adjust the timing offset based on this value. The AT may transmit a connection message to the ground station that includes AT location information. This information may be used by the ground station to facilitate beamforming.
Abstract translation: 描述了用于在飞行器终端（AT）建立无线通信链路的方法，系统和设备。 AT可以基于AT和地面站之间的传播延迟来确定定时偏移，在某些情况下，这可能超过100公里。 然后，AT可以基于所确定的定时偏移将初始接入消息发送到地面站。 在一些实施例中，AT可以从地面站接收包括定时对准值的访问响应消息，并且基于该值调整定时偏移。 AT可以向包括AT位置信息的地面站发送连接消息。 该信息可以由地面站使用以促进波束成形。
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15.发明申请公开(公告)号：US20150163683A1
公开(公告)日：2015-06-11
申请号：US14101919
申请日：2013-12-10
Applicant: QUALCOMM Incorporated
Inventor： June Namgoong , Srikant Jayaraman , Ruoheng Liu
CPC classification number: H04W16/28 , H04B7/06 , H04B7/0617 , H04B7/068 , H04B7/0691 , H04B7/0695 , H04W88/08
Abstract: 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.
Abstract translation: 描述了使用天线阵列在宽方位角上传输方法，系统和设备。 在一个示例中，描述了包括从天线阵列形成两个子阵列的方法。 为每个子阵列选择波束形成权重，以使辐射图在单元的方位角的范围内互补。 可以根据每个子阵列中的天线元素的数量根据递归关系来选择波束成形权重。 信息可以被编码，加扰和映射到调制符号。 然后，可以使用诸如Alamouti码之类的空间频率块码（SFBC）来形成要通过两个子阵列传输的两个信号。
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