公开(公告)号：US09232493B2

公开(公告)日：2016-01-05

申请号：US14170027

申请日：2014-01-31

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Hongyuan Zhang ,  Mao Yu ,  Su Khiong Yong ,  Sudhir Srinivasa

IPC: H04W64/00 ,  H04W56/00 ,  G01S11/02 ,  G01S13/76

CPC classification number: H04W56/004 ,  G01S5/06 ,  G01S11/02 ,  G01S13/767 ,  H04W56/002 ,  H04W64/003

Abstract: Methods, systems, and apparatus are disclosed for determining accurate ranging measurements between communication devices. Various embodiments are described for recording timestamps associated with when transmissions are sent and received between the communication devices. The communication devices are configured to determine a difference in their clock frequencies and to communicate this difference with one another. Furthermore, each of the communication devices is configured to compensate for these differences before or after the timestamps are exchanged and to send a compensation indicator of whether the compensation has been performed. If the compensation has not been performed, either of the communication devices can compensate for the clock frequency differences after receiving the timestamps based on the compensation indicator. By using compensated clock frequencies based on a single clock reference, highly accurate ranging measurements are obtained using round trip propagation time calculations.

Abstract translation: 公开了用于确定通信设备之间的精确测距测量的方法，系统和装置。 描述了用于记录与在通信设备之间发送和接收传输时相关联的时间戳的各种实施例。 通信设备被配置为确定其时钟频率的差异并且将这种差异传达给彼此。 此外，每个通信设备被配置为在交换时间戳之前或之后补偿这些差异，并且发送是否已经执行了补偿的补偿指示符。 如果没有执行补偿，则任一通信设备可以基于补偿指示符来补偿接收到时间戳之后的时钟频率差异。 通过使用基于单个时钟参考的补偿时钟频率，可以使用往返传播时间计算获得高精度的测距。

公开(公告)号：US20150319782A1

公开(公告)日：2015-11-05

申请号：US14697128

申请日：2015-04-27

Applicant: Marvell World Trade LTD.

Inventor： Liwen Chu ,  Lei Wang ,  Hongyuan Zhang ,  Hui-Ling Lou ,  Yakun Sun

IPC: H04W74/08 ,  H04W56/00

CPC classification number: H04W56/0015 ,  H04L1/00 ,  H04W28/18 ,  H04W56/001 ,  H04W74/00 ,  H04W74/08 ,  H04W88/08

Abstract: An access point including a generation module, a transceiver, and an acknowledgment module. The generation module is configured to generate a synchronization signal. The transceiver is configured to (i) transmit the synchronization signal to a station, (ii) receive a medium access control protocol data unit based on the synchronization signal during a transmit opportunity period for the station. The acknowledgment module is configured to generate an acknowledgment signal based on the reception of the medium access control protocol data unit. The synchronization signal or the acknowledgment signal includes a null data packet frame. The null data packet frame includes a legacy signal field. The legacy signal field comprises a length of a portion of the null data packet frame subsequent to the legacy signal field. The transceiver is configured to transmit the acknowledgment signal to the station.

Abstract translation: 接入点，包括生成模块，收发器和确认模块。 生成模块被配置为生成同步信号。 收发器被配置为（i）将同步信号发送到站，（ii）在站的发送机会期间基于同步信号接收介质访问控制协议数据单元。 确认模块被配置为基于媒体访问控制协议数据单元的接收来产生确认信号。 同步信号或确认信号包括空数据分组帧。 空数据分组帧包括遗留信号字段。 传统信号字段包括传统信号字段之后的零数据分组帧的一部分的长度。 收发器被配置为将确认信号发送到站。

公开(公告)号：US09160428B2

公开(公告)日：2015-10-13

申请号：US13964953

申请日：2013-08-12

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Yong Liu ,  Hongyuan Zhang ,  Hui-Ling Lou ,  Raja Banerjea

IPC: H04B7/04 ,  H04B7/06 ,  H04B7/08

CPC classification number: H04B7/0408 ,  H04B7/0695 ,  H04B7/088

Abstract: Training data for a first training session is generated to include a first data unit, the first data unit having a field that specifies a first number of beamforming training data units that can be communicated during a second training session to occur after the first training session. The training data including the first data unit is transmitted to a second device during the first training session. A second data unit received from the second device is processed to determine whether a request for the second device to participate in the second training session was accepted by the second device based on a first field of the second data unit. In response to determining that the request to participate in the second training session was accepted by the second device, the first number of beamforming training data units are transmitted during the second training session.

Abstract translation: 生成用于第一训练会话的训练数据以包括第一数据单元，第一数据单元具有指定可以在第一训练会话之后发生的第二训练会话期间传送的波束形成训练数据单元的第一数量的字段。 包括第一数据单元的训练数据在第一训练期间被传送到第二装置。 处理从第二设备接收的第二数据单元，以基于第二数据单元的第一字段来确定第二设备是否接受了参与第二训练会话的第二设备的请求。 响应于确定参与第二训练会话的请求被第二设备接受，在第二训练会话期间发送第一数量的波束形成训练数据单元。

公开(公告)号：US09130704B2

公开(公告)日：2015-09-08

申请号：US14193428

申请日：2014-02-28

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Hongyuan Zhang ,  Raja Banerjea

IPC: H04K1/10 ,  H04L7/00 ,  H04L27/26

CPC classification number: H04L7/0016 ,  H04L27/2601 ,  H04L27/2613 ,  H04L27/2666

Abstract: In a method for detecting, at a first communication device, a clock rate of a physical layer (PHY) data unit, the PHY data unit is received, at the first communication device, from a second communication device via a communication channel. The PHY data unit includes (i) a first portion and (ii) a second portion following the first portion. At the first communication device, the first portion of the PHY data unit is processed. Processing the first portion of the PHY data unit includes performing one or more autocorrelations to generate one or more respective autocorrelation outputs. At the first communication device and based on at least one of the one or more autocorrelation outputs, a clock rate of the second portion of the PHY data unit is determined.

Abstract translation: 在第一通信设备检测物理层（PHY）数据单元的时钟速率的方法中，PHY数据单元在第一通信设备处经由通信信道从第二通信设备接收。 PHY数据单元包括（i）第一部分和（ii）跟随第一部分的第二部分。 在第一通信设备处理PHY数据单元的第一部分。 处理PHY数据单元的第一部分包括执行一个或多个自相关以产生一个或多个相应的自相关输出。 在第一通信设备处，并且基于一个或多个自相关输出中的至少一个，确定PHY数据单元的第二部分的时钟速率。

公开(公告)号：US09125235B2

公开(公告)日：2015-09-01

申请号：US13959585

申请日：2013-08-05

Applicant: Marvell World Trade Ltd.

Inventor： Yong Liu ,  Harish Ramamurthy ,  Ken Kinwah Ho ,  Raja Banerjea ,  Hongyuan Zhang

IPC: H04W4/00 ,  H04J3/00 ,  H04W84/12 ,  H04L1/06 ,  H04L1/16 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04W28/06 ,  H04L1/06 ,  H04L1/1614 ,  H04L1/1685 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0032 ,  H04L5/0037 ,  H04L5/0064 ,  H04L5/0094 ,  H04L69/324 ,  H04W72/042 ,  H04W84/12

Abstract: Systems and techniques relating to wireless communications are described. A described technique includes obtaining data for transmission to a wireless communication device, the device being configured to process incoming transmissions based on an aggregate data unit format that specifies signaling for aggregating multiple medium access control (MAC) protocol data units (MPDUs); generating, based on the data and the aggregate data unit format, an aggregate MPDU (A-MPDU) that includes a single MPDU having a length greater than zero, the single MPDU residing in a subframe of the A-MPDU; setting a delimiter of the subframe to indicate that the single MPDU is the only MPDU within the A-MPDU that has a length greater than zero, and to cause the device to accept the A-MPDU without a corresponding block acknowledgement agreement; including, in a physical (PHY) frame, the A-MPDU; and transmitting the PHY frame to the device.

Abstract translation: 描述与无线通信相关的系统和技术。 所描述的技术包括获得用于传输到无线通信设备的数据，该设备被配置为基于指定用于聚合多个媒体接入控制（MAC）协议数据单元（MPDU）的信令的聚合数据单元格式来处理传入传输; 基于数据和聚合数据单元格式生成包括长度大于零的单个MPDU的聚合MPDU（A-MPDU），该单个MPDU驻留在A-MPDU的子帧中; 设置子帧的分隔符以指示单个MPDU是长度大于零的A-MPDU内的唯一MPDU，并且使得设备在没有相应的块确认协议的情况下接受A-MPDU; 包括在物理（PHY）帧中的A-MPDU; 并将PHY帧发送到设备。

公开(公告)号：US09059754B2

公开(公告)日：2015-06-16

申请号：US14467817

申请日：2014-08-25

Applicant: Marvell World Trade Ltd.

Inventor： Hongyuan Zhang ,  Salvador Iranzo Molinero

IPC: H04B7/04 ,  H04B7/06 ,  H04B7/08

CPC classification number: H04B7/0421 ,  H04B7/0617 ,  H04B7/063 ,  H04B7/0634 ,  H04B7/0663 ,  H04B7/0891

Abstract: Methods and apparatuses are provided for providing compressed feedback channel state information for beamforming. A beam transmitted by a transmission source is received at a receiving device. The receiving device computes a channel state matrix H of the transmission channel based on the received beam. Using the channel state matrix H, the receiving device performs a singular value decomposition procedure that produces a steering matrix V. The singular value decomposition procedure generates a set of angles (θV, φ) from which the steering matrix V can be computed. The receiving device transmits the set of angles (θV, φ) to the transmitting device. From the set of angles (θV, φ), the transmitting device can compute the steering matrix V.

Abstract translation: 提供了用于提供用于波束形成的压缩反馈信道状态信息的方法和装置。 在接收装置处接收由发送源发送的波束。 接收设备基于接收到的波束来计算传输信道的信道状态矩阵H. 使用信道状态矩阵H，接收设备执行产生导引矩阵V的奇异值分解过程。奇异值分解过程产生一组角度（“t”; V，＆phgr;）），从该角度可以计算导引矩阵V 。 接收装置向发送装置发送一组角度（＆amp; t; V，＆phgr;）。 从角度集（＆amp; t; V，＆phgr;），发射装置可以计算导引矩阵V.

公开(公告)号：US08988979B2

公开(公告)日：2015-03-24

申请号：US13739657

申请日：2013-01-11

Applicant: Marvell World Trade Ltd.

Inventor： Sudhir Srinivasa ,  Hongyuan Zhang ,  Yong Liu

IPC: H04J11/00 ,  H04L27/00 ,  H04L5/00 ,  H04L29/06

CPC classification number: H04L29/0653 ,  H04L1/0008 ,  H04L1/0041 ,  H04L1/0079 ,  H04L1/1671 ,  H04L5/0091 ,  H04L27/00

Abstract: In a method for generating a data unit, a signal field is generated to include a first subfield having one of: a length indication to indicate a number of bytes in a data portion of the data unit, or a duration indication to indicate a number of OFDM symbols in the data portion of the data unit and a second subfield to indicate whether the first subfield includes the length indication or the duration indication. When the first subfield includes the length indication, one or more padding bits are added to a set of information bits according to a first padding scheme. When the first subfield includes the duration indication, one or more padding bits are added to the set of information bits to according to a second padding scheme. Padded information bits are encoded, and the data unit is generated to included the encoded information bits.

Abstract translation: 在用于产生数据单元的方法中，生成信号字段以包括具有以下之一的第一子场：指示数据单元的数据部分中的字节数的长度指示，或表示数据单元的数量的持续时间指示 数据单元的数据部分中的OFDM符号和第二子字段，以指示第一子字段是否包括长度指示或持续时间指示。 当第一子字段包括长度指示时，根据第一填充方案将一个或多个填充比特添加到一组信息比特。 当第一子场包括持续时间指示时，根据第二填充方案将一个或多个填充比特添加到该组信息比特。 编码填充信息比特，生成数据单元以包含编码信息比特。

公开(公告)号：US20140362944A1

公开(公告)日：2014-12-11

申请号：US14467817

申请日：2014-08-25

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Hongyuan Zhang ,  Salvador Iranzo Molinero

IPC: H04B7/04 ,  H04B7/08

CPC classification number: H04B7/0421 ,  H04B7/0617 ,  H04B7/063 ,  H04B7/0634 ,  H04B7/0663 ,  H04B7/0891

Abstract: Methods and apparatuses are provided for providing compressed feedback channel state information for beamforming. A beam transmitted by a transmission source is received at a receiving device. The receiving device computes a channel state matrix H of the transmission channel based on the received beam. Using the channel state matrix H, the receiving device performs a singular value decomposition procedure that produces a steering matrix V. The singular value decomposition procedure generates a set of angles (θV, φ) from which the steering matrix V can be computed. The receiving device transmits the set of angles (θV, φ) to the transmitting device. From the set of angles (θV, φ), the transmitting device can compute the steering matrix V.

Abstract translation: 提供了用于提供用于波束形成的压缩反馈信道状态信息的方法和装置。 在接收装置处接收由发送源发送的波束。 接收设备基于接收到的波束来计算传输信道的信道状态矩阵H. 使用信道状态矩阵H，接收设备执行产生导引矩阵V的奇异值分解过程。奇异值分解过程产生一组角度（“t”; V，＆phgr;）），从该角度可以计算导引矩阵V 。 接收装置向发送装置发送一组角度（＆amp; t; V，＆phgr;）。 从角度集（＆amp; t; V，＆phgr;），发射装置可以计算导引矩阵V.

公开(公告)号：US20140294111A1

公开(公告)日：2014-10-02

申请号：US14302188

申请日：2014-06-11

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Peter Loc

IPC: H04B7/04

CPC classification number: H04B7/0413 ,  H04B7/0417 ,  H04B7/0632 ,  H04B7/0691 ,  H04B7/0817 ,  H04B7/0874 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0228 ,  H04L27/2647 ,  H04W24/00 ,  H04W52/241 ,  H04W52/248 ,  H04W52/325 ,  H04W52/42

Abstract: In a system having a first communication device with a first plurality of radio-frequency (RF) chains coupled to a first plurality of antennas and a second communication device with a second plurality of RF chains coupled to a second plurality of antennas, the second communication device receives consecutive training packets that were transmitted by the first communication device, the consecutive training packets having been produced at the first communication device by a power level rule to the first plurality of RF chains. The second communication device determines respective channel measurements corresponding to the consecutive training packets based on the power level rule, and selects a transmit parameter based on the respective channel measurements, the transmit parameter to be used by the first communication device when transmitting to the second communication device. The second communication device transmits and indication of the selected transmit parameter to the first communication device.

Abstract translation: 在具有第一通信设备的系统中，第一通信设备具有耦合到第一多个天线的第一多个射频（RF）链和具有耦合到第二多个天线的第二多个RF链的第二通信设备，第二通信 设备接收由第一通信设备发送的连续训练分组，已经通过功率电平规则在第一通信设备处产生的连续训练分组发送到第一多个RF链。 第二通信设备基于功率电平规则来确定对应于连续训练分组的各个信道测量，并且基于相应的信道测量来选择发送参数，第一通信设备在发送到第二通信时要使用的发送参数 设备。 第二通信设备向所述第一通信设备发送所选择的发送参数的指示。

公开(公告)号：US20140213193A1

公开(公告)日：2014-07-31

申请号：US14170027

申请日：2014-01-31

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Hongyuan Zhang ,  Mao Yu ,  Su Khiong Yong ,  Sudhir Srinivasa

IPC: H04W64/00

CPC classification number: H04W56/004 ,  G01S5/06 ,  G01S11/02 ,  G01S13/767 ,  H04W56/002 ,  H04W64/003

Abstract: Methods, systems, and apparatus are disclosed for determining accurate ranging measurements between communication devices. Various embodiments are described for recording timestamps associated with when transmissions are sent and received between the communication devices. The communication devices are configured to determine a difference in their clock frequencies and to communicate this difference with one another. Furthermore, each of the communication devices is configured to compensate for these differences before or after the timestamps are exchanged and to send a compensation indicator of whether the compensation has been performed. If the compensation has not been performed, either of the communication devices can compensate for the clock frequency differences after receiving the timestamps based on the compensation indicator. By using compensated clock frequencies based on a single clock reference, highly accurate ranging measurements are obtained using round trip propagation time calculations.

Abstract translation: 公开了用于确定通信设备之间的精确测距测量的方法，系统和装置。 描述了用于记录与在通信设备之间发送和接收传输时相关联的时间戳的各种实施例。 通信设备被配置为确定其时钟频率的差异并且将这种差异传达给彼此。 此外，每个通信设备被配置为在交换时间戳之前或之后补偿这些差异，并且发送是否已经执行了补偿的补偿指示符。 如果没有执行补偿，则任一通信设备可以基于补偿指示符来补偿接收到时间戳之后的时钟频率差异。 通过使用基于单个时钟参考的补偿时钟频率，可以使用往返传播时间计算获得高精度的测距。