公开(公告)号：US20170027017A1

公开(公告)日：2017-01-26

申请号：US15193037

申请日：2016-06-25

Applicant: QUALCOMM Incorporated

Inventor： Peter John BLACK ,  Qiang WU

IPC: H04W76/04 ,  H04W72/04 ,  H04B7/185 ,  H04W72/12

Abstract: Power consumption by a communication satellite may be reduced by operating in a transmission time interval (TTI) gating mode, in which an on period is provided for the satellite to transmit a reference signal (RS), control signals, and a portion of data within an on period through a forward link to a user terminal (UT), followed by an off period in which forward link transmission ceases. During the off period of the TTI, the satellite may turn off its forward link power amplifier and cease transmission of data to the UT. A gateway may send a signal enabling the TTI gating mode, as well as information specifying the TTI gating configuration, such as the length of the on or off period of the TTI, to the satellite.

Abstract translation: 可以通过在传输时间间隔（TTI）门控模式中操作来减少通信卫星的功率消耗，其中为卫星提供接通周期以传输参考信号（RS），控制信号和一部分数据 通过到用户终端（UT）的前向链路的接通周期，随后是前向链路传输停止的关闭时段。 在TTI的关闭期间，卫星可能会关闭其前向链路功率放大器，并停止将数据传输到UT。 网关可以发送启用TTI门控模式的信号，以及指定TTI门控配置的信息，例如TTI的接通或关闭时段的长度到卫星。

公开(公告)号：US20170019814A1

公开(公告)日：2017-01-19

申请号：US14865390

申请日：2015-09-25

Applicant: QUALCOMM Incorporated

Inventor： James DETERMAN ,  Dan VASSILOVSKI ,  Peyman RAZAGHI ,  Allen Minh-Triet TRAN ,  Mehmet GURELLI ,  Sumeeth NAGARAJA ,  Peter John BLACK ,  Qiang WU ,  Gene Wesley MARSH

IPC: H04W28/04 ,  H01Q3/34 ,  H01Q3/28 ,  H01Q1/28 ,  H01Q1/36

CPC classification number: H01Q1/288 ,  H01Q1/36 ,  H01Q3/28 ,  H01Q3/34 ,  H04B7/18513 ,  H04B7/2041 ,  H04W28/04 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/162 ,  Y02D70/164 ,  Y02D70/26 ,  Y02D70/446

Abstract: A non-geosynchronous satellite system, where each satellite has an antenna (perhaps a multi-element antenna) to form a beam pattern comprising a set of beams in the footprint of the satellite, where in one implementation each beam is substantially elliptical in shape having a minor axis and a major axis, where the minor axes are substantially collinear and the major axes are substantially oriented east to west. For a satellite, power is reduced or turned off for a subset of the set of beams, wherein each beam in the subset is reduced at or below a corresponding power level such that when a beam is powered above its corresponding power level an equivalent power flux-density (EPFD) exceeds a limit at some point on the Earth's surface.

Abstract translation: 一种非地球同步卫星系统，其中每个卫星具有天线（可能是多元天线）以形成包括卫星覆盖区中的一组波束的波束图，其中在一个实施方式中，每个波束基本上是椭圆形的， 短轴和长轴，其中短轴基本上共线，并且主轴基本上朝向东向西。 对于卫星，对于该组波束的子集，功率被减小或关闭，其中该子集中的每个波束被减小到等于或低于对应的功率电平，使得当波束被加电到高于其对应的功率电平时，等效功率通量 密度（EPFD）超过了地球表面某一点的极限。

公开(公告)号：US20170005741A1

公开(公告)日：2017-01-05

申请号：US15190601

申请日：2016-06-23

Applicant: QUALCOMM Incorporated

Inventor： Qiang WU ,  Peter John BLACK ,  Jelena DAMNJANOVIC

IPC: H04B17/364 ,  H04L5/14 ,  H04W24/08

Abstract: Methods and apparatus for efficient transmission of data by half-duplex transceivers in satellite communication systems are provided. Time reference for the return link is skewed or time-lagged relative to the time reference for the forward link to reduce the amount of guard time required to separate return link transmission from forward link reception by the half-duplex transceiver of a user terminal. The guard time is determined based on a maximum differential round-trip propagation delay and transition times of the half-duplexer transceiver to switch between transmit and receive modes. In a satellite communication system in which a large number of active user terminals are present in a beam coverage, random time offsets are applied to spread approximately equal traffic loads across the time offsets.

Abstract translation: 提供了卫星通信系统中半双工收发器有效传输数据的方法和装置。 返回链路的时间参考相对于前向链路的时间参考是偏斜的或时间滞后的，以减少用户终端的半双工收发器将返回链路传输与前向链路接收分开所需的保护时间量。 保护时间是基于半双工器收发器在发射和接收模式之间切换的最大差分往返传播延迟和转换时间来确定的。 在波束覆盖中存在大量活动用户终端的卫星通信系统中，随机时间偏移被应用以跨越时间偏移扩展近似相等的业务负载。

公开(公告)号：US20200252145A1

公开(公告)日：2020-08-06

申请号：US16852882

申请日：2020-04-20

Applicant: QUALCOMM Incorporated

Inventor： Qiang WU ,  Peter John BLACK ,  Jelena DAMNJANOVIC

IPC: H04B17/364 ,  H04B7/204 ,  H04B7/185 ,  H04L5/14 ,  H04W24/08

Abstract: Methods and apparatus for efficient transmission of data by half-duplex transceivers in satellite communication systems are provided. Time reference for the return link is skewed or time-lagged relative to the time reference for the forward link to reduce the amount of guard time required to separate return link transmission from forward link reception by the half-duplex transceiver of a user terminal. The guard time is determined based on a maximum differential round-trip propagation delay and transition times of the half-duplexer transceiver to switch between transmit and receive modes. In a satellite communication system in which a large number of active user terminals are present in a beam coverage, random time offsets are applied to spread approximately equal traffic loads across the time offsets.

公开(公告)号：US20140241269A1

公开(公告)日：2014-08-28

申请号：US14186953

申请日：2014-02-21

Applicant: QUALCOMM INCORPORATED

Inventor： John Edward SMEE ,  Jean-Marie Quoc Danh TRAN ,  Michael Lee MCCLOUD ,  Peter John BLACK ,  Alexei Yurievitch GOROKHOV

IPC: H04W72/04

CPC classification number: H04W72/042 ,  H04L1/1819 ,  H04L1/1835 ,  H04L1/1845

Abstract: Techniques and apparatus are provided for conditional offload of one or more LLRs or decoded bits. An exemplary electronic device (ED) method includes receiving a transmission of a physical downlink shared channel (PDSCH) having a transport block (TB) comprising at least one code block (CB), performing a cyclic redundancy check (CRC) of the at least one CB, in a memory external to a modem core of the ED, storing a subset of log-likelihood ratios (LLRs) associated with the at least one CB if the at least one CB failed the CRC or decoded bits associated with the at least one CB if the at least one CB passed the CRC, wherein the subset is based on an LLR range of the transmission relative to an LLR range of one or more previous transmissions, and using the stored subset of LLRs or decoded bits to process a re-transmission of the PDSCH.

Abstract translation: 为一个或多个LLR或解码比特的条件卸载提供技术和装置。 示例性电子设备（ED）方法包括接收具有包括至少一个码块（CB）的传输块（TB）的物理下行链路共享信道（PDSCH）的传输，执行至少 一个CB，在ED的调制解调器核心外部的存储器中，如果所述至少一个CB失败了所述CRC或与所述至少一个相关联的解码比特，则存储与所述至少一个CB相关联的对数似然比（LLR）的子集 一个CB，如果所述至少一个CB通过所述CRC，其中所述子集基于所述传输的相对于一个或多个先前传输的LLR范围的LLR范围，并且使用所存储的LLR或解码比特的子集来处理re 发送PDSCH。

公开(公告)号：US20180198518A1

公开(公告)日：2018-07-12

申请号：US15874361

申请日：2018-01-18

Applicant: QUALCOMM Incorporated

Inventor： Qiang WU ,  Peter John BLACK

IPC: H04B7/185 ,  H04W72/04 ,  H03M13/09 ,  H04L1/18 ,  H04L1/00 ,  H03M13/29 ,  H03M13/25 ,  H04L5/00

CPC classification number: H04B7/18582 ,  H03M13/09 ,  H03M13/258 ,  H03M13/2906 ,  H04B7/18517 ,  H04B7/18519 ,  H04B7/1858 ,  H04L1/00 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0041 ,  H04L1/0058 ,  H04L1/0064 ,  H04L1/0065 ,  H04L1/18 ,  H04L1/1867 ,  H04L5/0055 ,  H04W72/0446

Abstract: A communication satellite system provides for spectral efficient data transmissions by a gateway to multiple user terminals by way of a satellite. The gateway transmits multiple blocks in a single slot, each block intended for one of the user terminals, where each block is encoded and modulated according to a scheme that may be different for each intended user terminal. Upon re-transmission of a block if that block is lost or received in error, the block may be encoded and modulated according to another scheme that is less spectrally efficient than in the first transmission of the block.

公开(公告)号：US20160278033A1

公开(公告)日：2016-09-22

申请号：US14862822

申请日：2015-09-23

Applicant: QUALCOMM Incorporated

Inventor： Qiang WU ,  Peter John BLACK

IPC: H04W56/00 ,  H04B7/01 ,  H04B7/185

CPC classification number: H04W56/0015 ,  H04B7/01 ,  H04B7/18502 ,  H04B7/18513 ,  H04W56/0035 ,  H04W56/0045

Abstract: Method and apparatus for time or frequency synchronization of radio signals transmitted by user terminals in communication with a gateway through a satellite is provided. The satellite may be part of a non-synchronous satellite communication system, such as a low-earth orbit (LEO) satellite communication system for data, voice or video communications. Times of transmission of return link radio signals from the user terminals may be adjusted such that the signals arrive at the satellite or at the gateway without large time delay differentials. Carrier frequencies of return link radio signals transmitted from the user terminals may be adjusted such that the signals arrive at the satellite or at the gateway without large frequency offset differentials.

Abstract translation: 提供了用于通过卫星与网关通信的用户终端发送的无线电信号的时间或频率同步的方法和装置。 卫星可以是非同步卫星通信系统的一部分，例如用于数据，语音或视频通信的低地球轨道（LEO）卫星通信系统。 可以调整来自用户终端的返回链路无线电信号的传输时间，使得信号到达卫星或网关而没有大的时间延迟差。 可以调整从用户终端发送的返回链路无线电信号的载波频率，使得信号到达卫星或网关而没有大的频率偏移差分。

公开(公告)号：US20160277096A1

公开(公告)日：2016-09-22

申请号：US14865590

申请日：2015-09-25

Applicant: QUALCOMM Incorporated

Inventor： Qiang WU ,  Peter John BLACK

IPC: H04B7/185 ,  H04W72/04 ,  H04L1/00 ,  H03M13/29 ,  H03M13/09 ,  H04L5/00 ,  H03M13/25

CPC classification number: H04B7/18582 ,  H03M13/09 ,  H03M13/258 ,  H03M13/2906 ,  H04B7/18517 ,  H04B7/18519 ,  H04B7/1858 ,  H04L1/00 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0041 ,  H04L1/0058 ,  H04L1/0064 ,  H04L1/0065 ,  H04L1/18 ,  H04L5/0055 ,  H04W72/0446

Abstract: A communication satellite system provides for spectral efficient data transmissions by a gateway to multiple user terminals by way of a satellite. The gateway transmits multiple blocks in a single slot, each block intended for one of the user terminals, where each block is encoded and modulated according to a scheme that may be different for each intended user terminal. Upon re-transmission of a block if that block is lost or received in error, the block may be encoded and modulated according to another scheme that is less spectrally efficient than in the first transmission of the block.

Abstract translation: 通信卫星系统通过卫星通过网关向多个用户终端提供频谱有效的数据传输。 网关在单个时隙中发送多个块，每个块用于一个用户终端，其中每个块根据对于每个预期用户终端可能不同的方案进行编码和调制。 如果块错误地丢失或接收到块，则可以根据与块的第一次传输相比频谱效率低的另一方案对块进行编码和调制。