公开(公告)号：US09160643B2

公开(公告)日：2015-10-13

申请号：US13829272

申请日：2013-03-14

Applicant: QUALCOMM Incorporated

Inventor： Qinghai Gao ,  Balaji Srinivasan Babu ,  Shu Du

IPC: H04L12/26 ,  H04B7/04 ,  H04B7/06

CPC classification number: H04L43/0888 ,  H04B7/0413 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0689

Abstract: Systems and methods are disclosed for generating a statistical profile of a MIMO channel. Packets of information may be transmitted over an interval of time to a plurality of stations using a plurality of MIMO modes. Each packet may be binned and a goodput value corresponding to the bin, the station and the MIMO mode may be determined stored.

Abstract translation: 公开了用于生成MIMO信道的统计简档的系统和方法。 信息包可以使用多个MIMO模式通过时间间隔传送到多个站。 可以对每个分组进行分组，并且可以确定存储对应于bin，站和MIMO模式的有效输入值。

公开(公告)号：US20140341098A1

公开(公告)日：2014-11-20

申请号：US14277613

申请日：2014-05-14

Applicant: QUALCOMM Incorporated

Inventor： James Simon Cho ,  Arunkumar Jayaraman ,  Guido Robert Frederiks ,  Zhanfeng Jia ,  Shu Du ,  Alireza Raissinia ,  Jibing Wang ,  Sandip HomChaudhuri

IPC: H04W52/02 ,  H04L1/08

CPC classification number: H04W52/0238 ,  H04L1/08 ,  H04W52/0206 ,  H04W52/0216 ,  H04W52/0235 ,  H04W72/02 ,  H04W84/12 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/22

Abstract: Methods, systems, and devices are described for power conservation in a wireless communications system through efficient transmissions and acknowledgements of information between an AP and a station. The time between a determination by a station to enter a power saving mode and entering network sleep mode by the station may be reduced through a transmission, by an AP, of an MPDU to the station successive to an SIFS after transmission of an acknowledgement to the station of a PS-Poll frame from the station. The time to enter a power saving mode by a station may also be reduced through transmission of A-MPDUs in which a last MPDU of the A-MPDU has an indicator bit cleared to indicate no additional data is to be transmitted. An AP may prevent a retransmission of an MPDU to the station in the absence of an acknowledgement from the station, to further enhance efficiency.

Abstract translation: 描述了无线通信系统中的功率节省的方法，系统和设备，通过AP和站之间的有效传输和信息确认。 在站点确定进入节电模式并进入网络睡眠模式之间的时间可以通过AP向MPI发送确认之后的MPDU向连续的SIFS的站传输而减少 站点的PS-Poll帧。 由站点进入省电模式的时间也可以通过A-MPDU的传输来减少，其中A-MPDU的最后一个MPDU被清除以指示不发送附加数据。 在没有来自站的确认的情况下，AP可以阻止对站的MPDU的重传，以进一步提高效率。

公开(公告)号：US08861355B2

公开(公告)日：2014-10-14

申请号：US13677251

申请日：2012-11-14

Applicant: QUALCOMM Incorporated

Inventor： Zhanfeng Jia ,  Shu Du ,  Ning Zhang

IPC: H04L1/00 ,  H04W28/02 ,  H04L12/18 ,  H04W4/06 ,  H04L1/16

CPC classification number: H04W28/0236 ,  H04L1/0002 ,  H04L1/0019 ,  H04L1/0027 ,  H04L1/0033 ,  H04L1/1685 ,  H04L12/189 ,  H04L2001/0093 ,  H04W4/06

Abstract: A method of providing multicast rate control in a wireless communication device can include transmitting data frames to a plurality of stations in a multicast group with a first data rate. Acknowledgements (ACKs) can then be requested from a first subset of the plurality of stations. Frame losses can be determined using the ACKs from the first subset. A second data rate can be determined based on the frame losses with the first subset. A second subset of the plurality of stations can be selected based on the frame losses with the first subset. Data frames can be transmitted to the plurality of stations with the second data rate. Notably, ACKs only from the second subset of the plurality of stations are requested. Frame losses for the second subset can be determined using those ACKs. A current data rate can be adjusted based on the frame losses for the subset and at least one predetermined threshold. Data frames can be transmitted to the plurality of stations using the adjusted data rate.

Abstract translation: 一种在无线通信设备中提供组播速率控制的方法可以包括以多个第一数据速率向组播组中的多个站发送数据帧。 然后可以从多个站的第一子集请求致谢（ACK）。 可以使用来自第一子集的ACK来确定帧丢失。 可以基于第一子集的帧丢失来确定第二数据速率。 可以基于与第一子集的帧丢失来选择多个站的第二子集。 可以以第二数据速率将数据帧发送到多个站。 值得注意的是，请求仅来自多个站的第二子集的ACK。 可以使用这些ACK来确定第二子集的帧丢失。 可以基于子集的帧丢失和至少一个预定阈值来调整当前数据速率。 可以使用经调整的数据速率将数据帧发送到多个站。

公开(公告)号：US20140269964A1

公开(公告)日：2014-09-18

申请号：US14059073

申请日：2013-10-21

Applicant: QUALCOMM Incorporated

Inventor： Shu Du ,  Qinghai Gao ,  James Simon Cho ,  Chin-Hung Chen ,  Didier Johannes Richard Van Nee

IPC: H04B7/04

CPC classification number: H04B7/0452 ,  H04B7/0617 ,  H04B7/0691 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/009 ,  H04L1/06 ,  H04L1/1621 ,  H04L1/1685

Abstract: An access point can include an array of antennas and a smart antenna selector. The smart antenna selector is configured to select a subset of antennas from the antenna array for use in multi-user multiple-input multiple-output (MU MIMO) data transmissions. Stations that are communicatively coupled to the access point can be selected for inclusion in a multi-user group based, at least in part, on performance measurements of the stations. Performance measurements are determined directly and indirectly from data transmissions sent in response to sounding packets. Antennas for use in MU MIMO data transmissions are selected for the antenna array based, at least in part, on previous antenna selections used for single user data transmissions.

Abstract translation: 接入点可以包括天线阵列和智能天线选择器。 智能天线选择器被配置为从天线阵列中选择天线的子集，以用于多用户多输入多输出（MU MIMO）数据传输。 可以至少部分地基于站的性能测量来选择通信地耦合到接入点的站点以包括在多用户组中。 性能测量直接和间接地从响应于声音分组发送的数据传输确定。 至少部分地基于用于单用户数据传输的先前天线选择天线阵列来选择用于MU MIMO数据传输的天线。

公开(公告)号：US20140254424A1

公开(公告)日：2014-09-11

申请号：US13843720

申请日：2013-03-15

Applicant: QUALCOMM INCORPORATED

Inventor： Qinghai Gao ,  Vishnu Vardhan Bala Krishnan ,  Shu Du ,  Zhanfeng Jia

IPC: H04W24/02

CPC classification number: H04L1/0001 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/1614 ,  H04L1/1628 ,  H04W28/22

Abstract: Various aspects of the disclosure described herein provide for optimizing rate control during a selection of a communications profile from a set of communications profiles by taking into account effective frame aggregation size as a function of packet error rate (PER). An expected throughput may also be determined for each communications profile and updated after each transmission so that a communications profile having the highest expected throughput may be chosen for a particular frame transmission.

Abstract translation: 本文所描述的公开内容的各个方面提供了在通过考虑作为分组错误率（PER）的函数的有效帧聚合大小的情况下，在从一组通信简档选择通信简档期间优化速率控制。 还可以为每个通信简档确定期望的吞吐量，并且在每个传输之后更新，以便可以针对特定的帧传输选择具有最高预期吞吐量的通信简档。

公开(公告)号：US20140254408A1

公开(公告)日：2014-09-11

申请号：US14038027

申请日：2013-09-26

Applicant: QUALCOMM Incorporated

Inventor： Ashish Kumar Shukla ,  Naveen Pratap Singh ,  Shu Du ,  Qinghai Gao ,  Zhanfeng Jia ,  Vishnu Vardhan Bala Krishnan

IPC: H04L1/00 ,  H04W24/02

CPC classification number: H04L1/0002 ,  H04L1/0007 ,  H04L1/1614 ,  H04L1/1685

Abstract: MAC layer frame aggregation and block acknowledgement are used in some WLAN technologies to improve efficiency of a communications channel by reducing PHY layer overhead. A frame aggregation window size defines how many MAC protocol data units (MPDUs) are included in an aggregated MPDU (AMPDU) frame. The frame aggregation window for a subsequent AMPDU frame is typically dependent upon the characteristics of the block acknowledgement—such as the number of non-acknowledged (NAK) MPDUs or the position of a hole in the previous AMPDU frame. A small frame aggregation window size may impact throughput especially at higher transmission rates. In this disclosure a transmission rate may be determined based, at least in part, on a projected frame aggregation window size resulting from a block acknowledgement. The frame aggregation feedback (e.g. block acknowledgement) may be used by a rate control module to determine a transmission rate that optimizes frame aggregation efficiency.

Abstract translation: 在一些WLAN技术中使用MAC层帧聚合和块确认，以通过减少PHY层开销来提高通信信道的效率。 帧聚合窗口大小定义在聚合MPDU（AMPDU）帧中包括多少MAC协议数据单元（MPDU）。 用于后续AMPDU帧的帧聚合窗口通常取决于块确认的特性，例如未确认（NAK）MPDU的数量或先前AMPDU帧中的孔的位置。 小帧聚合窗口大小可能会影响吞吐量，特别是在较高的传输速率下。 在本公开中，可以至少部分地基于由块确认产生的投影帧聚合窗口尺寸来确定传输速率。 帧聚合反馈（例如块确认）可以被速率控制模块用于确定优化帧聚合效率的传输速率。

公开(公告)号：US20140254349A1

公开(公告)日：2014-09-11

申请号：US13791786

申请日：2013-03-08

Applicant: QUALCOMM INCORPORATED

Inventor： Zhanfeng Jia ,  Shu Du ,  Sandip HomChaudhuri

IPC: H04W28/04

CPC classification number: H04L5/0055 ,  H04B7/02 ,  H04B7/022 ,  H04L1/04 ,  H04L1/1835 ,  H04L5/001 ,  H04L5/0037 ,  H04L45/24 ,  H04L47/34 ,  H04L47/40 ,  H04W28/0252 ,  H04W28/04 ,  H04W40/125 ,  H04W88/06

Abstract: One innovation includes an apparatus, for wirelessly communicating with a communication system via a first wireless channel and a second wireless channel, including a memory unit that is configured to store a first data packet and a second data packet, the first data packet and the second data packet have consecutive sequence numbers. The apparatus further includes a processor configured to retrieve the first data packet and the second data packet from the memory unit, a transceiver that is configured to transmit the first data packet to the communication system via the first channel, to receive a first acknowledgement from the communication system and to transmit the second data packet to the communication system via the second channel after the processor detects that the first acknowledgement comprises a positive acknowledgement of the first reception information.

Abstract translation: 一个创新包括一种用于经由第一无线信道和第二无线信道与通信系统进行无线通信的装置，包括被配置为存储第一数据分组和第二数据分组的存储器单元，第一数据分组和第二数据分组 数据包具有连续的序列号。 该装置还包括处理器，其被配置为从存储器单元检索第一数据分组和第二数据分组;收发器，被配置为经由第一信道将第一数据分组发送到通信系统，以从第一信道接收第一数据分组 通信系统，并且在处理器检测到第一确认包括第一接收信息的肯定确认之后，经由第二信道将第二数据分组发送到通信系统。