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    ADAPTIVE TARGET WAKE TIME SCHEDULING
    22.
    发明申请
    ADAPTIVE TARGET WAKE TIME SCHEDULING 审中-公开

    公开(公告)号：US20180295573A1

    公开(公告)日：2018-10-11

    申请号：US15481106

    申请日：2017-04-06

    Applicant: QUALCOMM Incorporated

    Inventor： Ravi Gidvani ,  Sandip HomChaudhuri ,  Zhanfeng Jia ,  BadriSrinivasan Sampathkumar ,  Alireza Raissinia ,  Srinivas Katar ,  Madhan Jaganathan ,  Xiaolong Huang

    IPC: H04W52/02 ,  H04W72/04

    Abstract: Methods, systems, and devices for wireless communication are described. An access point (AP) may communicate with a plurality of stations in a basic service set (BSS) according to a target wakeup time (TWT) slot duration. The AP may identify one or more congestion or interference factors for the BSS. In some cases, the AP may identify a congestion score based at least in part on at least one of the one or more congestion factors from one or more stations that can be part of its own BSS, and an interference score based at least in part on at least one of the one or more interference factors form one or more stations that are not part of AP's BSS. In some cases, the AP may modify the TWT slot duration based at least in part on the congestion score and the interference score.

    Polling beacon
    23.
    发明授权
    Polling beacon 有权

    公开(公告)号：US09807691B2

    公开(公告)日：2017-10-31

    申请号：US13781612

    申请日：2013-02-28

    Applicant: QUALCOMM Incorporated

    Inventor： Zhanfeng Jia ,  Sandip HomChaudhuri ,  Alireza Raissinia

    IPC: H04W52/02 ,  H04W48/14 ,  H04W48/12

    CPC classification number: H04W52/0229 ,  H04W48/12 ,  H04W48/14 ,  H04W52/0216 ,  Y02D70/142

    Abstract: Beacon-poll frames are transmitted from a station (STA) to a wireless AP in an opportunistic manner. In response to receiving a beacon-poll frame, the wireless AP transmits a unicast beacon frame to the STA, thereby eliminating the need for the STA to periodically wake up to receive broadcast beacon frames from the AP. The wireless AP may transmit the unicast beacon frame at a higher speed than a conventional broadcast beacon frame. As a result, the time that the STA must be awake to receive the unicast beacon frame is significantly less than the time that the STA must be awake to receive a conventional broadcast beacon frame, thereby resulting in significant power savings within the STA. The wireless AP may aggregate downlink (DL) data packets to be transmitted to the STA with the unicast beacon frame, resulting in further power savings within the STA.

    Methods permitting a wireless system receiver to determine and report channel conditions to a system transmitter
    26.
    发明授权
    Methods permitting a wireless system receiver to determine and report channel conditions to a system transmitter 有权
    允许无线系统接收机确定并向系统发射机报告信道条件的方法

    公开(公告)号：US09191146B2

    公开(公告)日：2015-11-17

    申请号：US13924377

    申请日：2013-06-21

    Applicant: QUALCOMM Incorporated

    Inventor： Zhanfeng Jia ,  Shu Du ,  Ning Zhang

    IPC: H04L1/00 ,  H04L1/16 ,  H04L1/20

    CPC classification number: H04L1/00 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/1671 ,  H04L1/20

    Abstract: A method of providing feedback on channel observations to a transmitter includes observing a channel at a receiver based on received signals from the transmitter and determining whether a packet error rate (PER) is rising based on the observing. The receiver determines whether a rising PER is caused by channel noise or interference, and transmits a message to the transmitter indicating the cause of the rising PER. The cause may be encoded in reserved bits of a block acknowledgement (BA) frame or an Acknowledge (ACK) frame, or in a modulation coding scheme (MCS) used to transmit the message. The cause may be detected in response to SNR/RSSI level of received signals, or a number of receiver restarts. The transmitter may change the transmit rate adaptation algorithm to use a lower MCS if channel noise causes the rising PER, and a higher MCS if interference causes the rising PER.

    Abstract translation: 向发射机提供信道观测的反馈的方法包括基于来自发射机的接收信号观察接收机处的信道，并基于观测确定分组差错率（PER）是否正在上升。 接收机确定上升的PER是由信道噪声还是干扰引起的，并且向发射机发送指示引起增加的PER的原因的消息。 原因可以在块确认（BA）帧或应答（ACK）帧的保留位或者用于发送消息的调制编码方案（MCS）中编码。 可以响应于接收到的信号的SNR / RSSI电平或者接收机重启的次数来检测原因。 如果信道噪声导致上升的PER，则发射机可以改变发射速率自适应算法以使用较低的MCS，如果干扰导致上升的PER，则发射机可以改变较高的MCS。

    ACCESS POINT RESPONSE TO PS-POLL
    28.
    发明申请
    ACCESS POINT RESPONSE TO PS-POLL 审中-公开
    接触点对PS-POLL的反应

    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。

    Multicast rate control
    29.
    发明授权
    Multicast rate control 有权
    组播速率控制

    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。

    METHOD AND APPARATUS FOR OPTIMIZING RATE CONTROL BASED ON PACKET AGGREGATION CONSIDERATIONS
    30.
    发明申请
    METHOD AND APPARATUS FOR OPTIMIZING RATE CONTROL BASED ON PACKET AGGREGATION CONSIDERATIONS 有权
    基于分组聚类考虑优化速率控制的方法和装置

    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。

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