公开(公告)号：US09843411B2

公开(公告)日：2017-12-12

申请号：US15132990

申请日：2016-04-19

Applicant: QUALCOMM Incorporated

Inventor： Qinghai Gao ,  Nathaniel David Houghton ,  Ahmed Ragab Elsherif ,  Ehab Tahir

IPC: H04L1/00 ,  H04B7/0452 ,  H04W72/08

CPC classification number: H04L1/0003 ,  H04B7/0452 ,  H04L1/003 ,  H04W72/085

Abstract: Wireless node selects modulation coding schemes (MCS) and number of spatial streams for transmitting data to devices via a MU-MIMO transmission based on the total number of spatial streams. In one implementation, a wireless node selects first MCS, first number of spatial stream(s) for a first device, and total number of spatial streams to be used in the MU-MIMO transmission so as to maximize the data rate to the first device, then selects a second MCS and a second number of spatial stream(s) for a second device based on the selected total number of spatial streams. In another implementation, the wireless node toggles the first selection of the MCS and spatial stream(s) between the first and second devices for fairness purposes. In another implementation, a wireless selects the MCS and the spatial streams for the receiving nodes so as to maximize the aggregate data rate for the MU-MIMO transmission.

公开(公告)号：US20160006842A1

公开(公告)日：2016-01-07

申请号：US14322465

申请日：2014-07-02

Applicant: QUALCOMM Incorporated

Inventor： Ehab Tahir

IPC: H04L29/06 ,  H04L12/741

CPC classification number: H04L69/03 ,  H04L45/74 ,  H04L69/22 ,  H04L69/324

Abstract: Described is a frame format for a protocol data unit (PDU). The frame format may support enhanced features in a communication network. The first frame format is based at least in part on a second frame format that is predefined by a communication protocol. The first frame format may support enhanced features for those devices that know the first frame format and which are capable of interpreting the first frame format. Legacy devices may interpret the PDU as following the second frame format according to the communication protocol. The first frame format may be created by overloading some fields in the second frame format. The first frame format may match parts of the second frame format that are used for contention timing (or other medium synchronization). In one example, the PDU may include an instruction creating a media idle measurement period.

Abstract translation: 描述了用于协议数据单元（PDU）的帧格式。 帧格式可以支持通信网络中的增强特征。 第一帧格式至少部分地基于由通信协议预定义的第二帧格式。 第一帧格式可以支持那些知道第一帧格式并且能够解释第一帧格式的那些设备的增强特征。 传统设备可以根据通信协议将PDU解释为遵循第二帧格式。 可以通过以第二帧格式重载一些字段来创建第一帧格式。 第一帧格式可以匹配用于竞争定时（或其他介质同步）的第二帧格式的部分。 在一个示例中，PDU可以包括创建媒体空闲测量周期的指令。

公开(公告)号：US09231736B2

公开(公告)日：2016-01-05

申请号：US14085527

申请日：2013-11-20

Applicant: QUALCOMM Incorporated

Inventor： Arun Avudainayagam ,  Ehab Tahir

IPC: G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04L1/16 ,  H04L1/00 ,  H04L1/18 ,  H04L12/413 ,  H04L5/00 ,  H04L27/26

CPC classification number: H04L1/1607 ,  H04L1/0042 ,  H04L1/005 ,  H04L1/1614 ,  H04L1/1628 ,  H04L1/1812 ,  H04L1/1848 ,  H04L1/1854 ,  H04L5/0007 ,  H04L12/413 ,  H04L27/2646

Abstract: A response interframe space (RIFS) time period may be adapted in a communication system. The RIFS time period may be determined based, at least in part, on a processing time used by a receiving device to process a received physical layer transmission from a transmitting device. The RIFS may be optimized in consideration of channel conditions for a particular communications channel, capabilities of a receiving device, and/or characteristics of a particular physical layer transmission. For example, the RIFS may be dependent on characteristics of a final transmission symbol used to transmit a physical layer transmission. The RIFS may depend on a processing time associated with decoding forward error correction (FEC) encoded blocks that end in the final transmission symbol. The RIFS may depend on a quantity of decoding iterations in a communication system that uses iterative decoding of FEC encoded blocks.

Abstract translation: 可以在通信系统中调整响应帧间间隔（RIFS）时间段。 可以至少部分地基于接收设备用于处理来自发送设备的接收的物理层传输所使用的处理时间来确定RIFS时间段。 可以考虑到特定通信信道的信道条件，接收设备的能力和/或特定物理层传输的特性来优化RIFS。 例如，RIFS可以依赖于用于发送物理层传输的最终传输符号的特性。 RIFS可以取决于与解码在最终传输符号中结束的前向纠错（FEC）编码块相关联的处理时间。 RIFS可以依赖于使用FEC编码块的迭代解码的通信系统中的解码迭代量。

公开(公告)号：US20150318893A1

公开(公告)日：2015-11-05

申请号：US14494268

申请日：2014-09-23

Applicant: QUALCOMM Incorporated

Inventor： Ehab Tahir ,  Brian James Langlais ,  Joubin Karimi

IPC: H04B3/54 ,  H04W24/10 ,  H04L12/18

CPC classification number: H04B3/54 ,  H04B2203/5425 ,  H04H20/84 ,  H04L5/0007 ,  H04L5/0062 ,  H04L12/189 ,  H04L27/2626 ,  H04L27/3411 ,  H04W24/10 ,  H04W52/24 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162

Abstract: Transmission power of a signal may be lowered in response to detecting a broadcast radio transmission. A communication device may communicate via a powerline communication (PLC) medium by transmitting, via the PLC medium, a signal having at least a first carrier frequency. The communication device may detect a broadcast radio transmission. The communication device may lower a transmission power setting associated with the first carrier frequency from a first power level to a second power level that is lower than the first power level in response to detecting the broadcast radio transmission. The communication device may transmit, via the PLC medium, the signal having at least the first carrier frequency at the second power level during a time period associated with the broadcast radio transmission.

Abstract translation: 响应于检测到广播无线电传输，信号的传输功率可能降低。 通信设备可以经由电力线通信（PLC）介质通过经由PLC介质发送具有至少第一载波频率的信号来进行通信。 通信设备可以检测广播无线电传输。 响应于检测到广播无线电传输，通信设备可以将与第一载波频率相关联的发射功率设置从第一功率电平降低到低于第一功率电平的第二功率电平。 通信设备可以在与广播无线电传输相关联的时间周期期间经由PLC介质发送具有第二功率电平的至少第一载波频率的信号。

公开(公告)号：US20150103809A1

公开(公告)日：2015-04-16

申请号：US14052152

申请日：2013-10-11

Applicant: Qualcomm Incorporated

Inventor： Joubin Karimi ,  Brian James Langlais ,  Hassan Kaywan Afkhami ,  John Fraser Chappel ,  Keith Bryan Riley ,  Ehab Tahir

IPC: H04W52/24 ,  H04L7/00 ,  H04W56/00 ,  H04L25/03

CPC classification number: H04W52/246 ,  H04B3/542 ,  H04B2203/5425 ,  H04L5/0046 ,  H04L7/007 ,  H04L25/03834 ,  H04L27/2646 ,  H04W28/18 ,  H04W52/223 ,  H04W52/346 ,  H04W56/001 ,  H04W72/12

Abstract: This disclosure provides several mechanisms for adapting transmit power spectral density (PSD). A communications device may adapt the power spectrum utilized at the transmitter based, at least in part, on the channel conditions or PSD constraints associated with the communications medium between the transmitter and a receiver device. Additionally, the transmit PSD may be adapted based, at least in part, on a total power capability associated with a transmitter. Power is allocated to improve throughput and utilization of the communications channel. A transmission profile may be selected based, at least in part, on the notch depth. The transmission profile may be associated with symbol timing parameters. The communications device may maintain a plurality of selectable pulse shapes that are optimized for different notch depths.

公开(公告)号：US08995247B2

公开(公告)日：2015-03-31

申请号：US13735966

申请日：2013-01-07

Applicant: QUALCOMM Incorporated

Inventor： John Fraser Chappel ,  Ehab Tahir ,  Richard David Roze ,  Brian James Langlais ,  Joubin Karimi

IPC: H04B1/00 ,  H04L27/22 ,  G06F1/32 ,  H04L27/26

CPC classification number: G06F1/3206 ,  G06F1/3209 ,  H04L27/2605 ,  H04L27/2655

Abstract: A first network device detects at least a first orthogonal code included in a preamble of a network packet received at the first network device from a second network device in an orthogonal frequency division multiplexing (OFDM) communication network. The first network device determines whether the first orthogonal code included in the preamble is associated with an assigned orthogonal code for the first network device. The assigned orthogonal code for the first network device is orthogonal to other assigned orthogonal codes for other network devices in the OFDM communication network. An operational mode of the first network device is changed from a sleep mode to an awake mode in response to determining the first orthogonal code is associated with the assigned orthogonal code for the first network device.

Abstract translation: 第一网络设备从正交频分复用（OFDM）通信网络中的第二网络设备检测在第一网络设备处接收的网络分组的前导码中包括的至少第一正交码。 第一网络设备确定包括在前同步码中的第一正交码是否与所分配的第一网络设备的正交码相关联。 第一网络设备的分配的正交码与OFDM通信网络中的其他网络设备的其他分配的正交码正交。 响应于确定第一正交码与所分配的第一网络设备的正交码相关联，第一网络设备的操作模式从睡眠模式改变为唤醒模式。

公开(公告)号：US20140355712A1

公开(公告)日：2014-12-04

申请号：US14167969

申请日：2014-01-29

Applicant: QUALCOMM Incorporated

Inventor： Brian James Langlais ,  Joubin Karimi ,  Ehab Tahir ,  Gregory Allen Magin

IPC: H04L25/02

CPC classification number: H04L25/02 ,  H03G3/3042

Abstract: A transmitting device may control digital-to-analog converter (DAC) illumination to optimize signal to noise ratio of a transmission signal. DAC illumination may be adjusted based, at least in part, on analog gain and estimated total transmit power of a particular transmission signal. For each destination, total transmit power may be estimated based on tone map, amplitude map, back-off settings, or other characteristics. The estimated total transmit power is used to determine an appropriate analog gain. Once analog gain and total transmit power are known, fine control of SNR may be achieved by adjusting power level in the digital domain. A digital power control setting is used to scale the amplitude of the digital baseband signal prior to DAC operation. The DAC illumination of the digital baseband signal allows the DAC to operate at an optimized power level within the digital range of the DAC.

Abstract translation: 传输设备可以控制数模转换器（DAC）照明以优化传输信号的信噪比。 可以至少部分地基于特定传输信号的模拟增益和估计总发射功率来调整DAC照明。 对于每个目的地，总发射功率可以基于色调映射，幅度映射，退避设置或其他特性来估计。 估计的总发射功率用于确定适当的模拟增益。 一旦模拟增益和总发射功率已知，则可以通过调整数字域中的功率电平来实现SNR的精细控制。 数字功率控制设置用于在DAC操作之前缩放数字基带信号的幅度。 数字基带信号的DAC照明允许DAC在DAC的数字范围内以优化的功率电平工作。

公开(公告)号：US20140269873A1

公开(公告)日：2014-09-18

申请号：US13798602

申请日：2013-03-13

Applicant: QUALCOMM INCORPORATED

Inventor： Ehab Tahir ,  Son Binh Cam ,  Richard David Roze ,  Joubin Karimi ,  Brian James Langlais ,  John Fraser Chappel ,  Syed Hussain ,  Manjunath Krishnam ,  Gregory Magin

IPC: H04L1/00

CPC classification number: H04L1/0026 ,  H04B3/544 ,  H04L5/0046 ,  H04L5/0053 ,  H04L5/0094 ,  H04W52/241 ,  H04W52/262 ,  H04W52/346

Abstract: A tone map includes physical layer transmission properties for a multi-carrier communications channel. The physical layer transmission properties indicate modulation mode and transmission power to be used on one or more frequencies (i.e. “tones”). The transmission power may be reduced on a first frequency having a high signal-to-noise ratio (SNR) so that performance will improve for a second frequency having a lower SNR. Transmission power may be reduced on a first frequency having an unusably low SNR so that performance will improve on a second frequency. A tone map message is used to efficiently communicate modulation and transmission power adjustments on a per-carrier basis.

Abstract translation: 音调图包括多载波通信信道的物理层传输属性。 物理层传输属性表示要在一个或多个频率（即“音调”）上使用的调制模式和发射功率。 可以在具有高信噪比（SNR）的第一频率上减小发射功率，使得性能将改善具有较低SNR的第二频率。 可以在具有不可靠的低SNR的第一频率上降低发射功率，使得性能将在第二频率上改善。 音调映射消息用于在每个载波的基础上有效地传达调制和传输功率调整。

公开(公告)号：US09661110B2

公开(公告)日：2017-05-23

申请号：US14622089

申请日：2015-02-13

Applicant: QUALCOMM Incorporated

Inventor： Ehab Tahir

IPC: H04L29/06 ,  H04L17/00 ,  H04L29/08 ,  H04L7/00

CPC classification number: H04L69/22 ,  H04L7/00 ,  H04L67/12 ,  H04L69/26 ,  H04L69/322 ,  H04L69/323

Abstract: Described herein is a system and method for enhanced channel access in existing communication networks. The system comprising: a first enhanced node comprising a first processor, the first processor configured to: transmit a legacy frame header of a physical layer protocol data unit (PPDU), the legacy frame header comprising an indicator indicating that sub-PPDUs will be transmitted during a duration associated with transmission of a legacy PPDU; a second enhanced node comprising a second processor configured to receive the legacy frame header; and a third enhanced node comprising a third processor configured to receive the legacy frame header.

公开(公告)号：US20170063438A1

公开(公告)日：2017-03-02

申请号：US14842592

申请日：2015-09-01

Applicant: QUALCOMM Incorporated

Inventor： Eugene Baik ,  Ahmed Ragab Elsherif ,  Qinghai Gao ,  Gregory Steele ,  Srinivas Katar ,  Didier Johannes Richard van Nee ,  Ehab Tahir

IPC: H04B7/04 ,  H04W16/28 ,  H04L5/00

CPC classification number: H04L5/006 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0632 ,  H04L5/0023 ,  H04L5/0037

Abstract: Methods, systems, and devices are described for wireless communication. In one aspect, a method of wireless communication includes receiving, by a first wireless device, compressed beamforming information from each of a plurality of stations, the compressed beamforming information including a feedback signal-to-noise ratio (SNR) value and compressed feedback matrix. The method also includes determining a multi-user signal-to-interference-plus noise ratio (SINR) metric for each of the plurality of stations based at least in part on the received feedback SNR values and the received compressed feedback matrices.

Abstract translation: 描述了用于无线通信的方法，系统和设备。 一方面，一种无线通信方法包括：由第一无线设备从多个站中的每一个接收压缩波束成形信息，所述压缩波束成形信息包括反馈信噪比（SNR）值和压缩反馈矩阵 。 该方法还包括至少部分地基于所接收的反馈SNR值和接收的压缩反馈矩阵来确定多个站中的每一个的多用户信号与干扰加噪声比（SINR）度量。