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公开(公告)号：US11245501B2
公开(公告)日：2022-02-08
申请号：US16559571
申请日：2019-09-03
Applicant: QUALCOMM Incorporated
Inventor： George Cherian , Alfred Asterjadhi , Abhishek Pramod Patil , Sameer Vermani , Bin Tian , Stephen Jay Shellhammer , Lochan Verma , Lin Yang , Jialing Li Chen
Abstract: Methods, systems, and devices for wireless communications are described for coordination between multiple access points (APs) for communications within a transmission opportunity (TxOP). A first AP may gain channel access for a TxOP, and may coordinate with at least a second AP to allow both the first AP and the second AP to transmit and receive wireless communications during the TxOP. The first AP, upon gaining channel access following a successful contention-based channel access procedure, may initiate a scheduling phase with the second AP to schedule of resources within the TxOP for the first and second APs. The first AP may initiate a multi-AP coordinated transmission phase following the scheduling phase, during which both the first AP and second AP may communicate with one or more associated STAs.
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公开(公告)号：US20210359885A1
公开(公告)日：2021-11-18
申请号：US17320221
申请日：2021-05-14
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Bin Tian , Sameer Vermani , Jialing Li Chen , Youhan Kim
IPC: H04L27/26
Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, for generating or receiving a multi-generation physical layer protocol data unit (PPDU). The multi-generation PPDU may concurrently include a first generation-specific preamble based on a first generation of a wireless communication specification (such as that defined by the Institute of Electrical and Electronics Engineers (IEEE) 802.11 family of standards) and a second generation-specific preamble based on a second generation of the wireless communication specification in a same transmission. The generation-specific preambles may be generated based on bandwidth portions of a wireless channel that each generation-specific preamble will occupy in the multi-generation PPDU. One or more of the generation-specific preambles may be modified based on an aggregate bandwidth of the multi-generation PPDU. This disclosure includes several options for modifying one or more generation-specific preambles or data fields to accommodate their use in a multi-generation PPDU.
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13.发明授权公开(公告)号：US11121822B2
公开(公告)日：2021-09-14
申请号：US16668769
申请日：2019-10-30
Applicant: QUALCOMM Incorporated
Inventor： James Simon Cho , Tao-Fei Samuel Ng , Youhan Kim , Bin Tian , Jialing Li Chen , Stephen Jay Shellhammer , Vincent Knowles Jones, IV
Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a hybrid automatic repeat request (HARQ) protocol in a wireless local area network (WLAN). A first WLAN device may generate a first HARQ packet for transmission to a second WLAN device. The first WLAN device may determine a first basic service set (BSS) indicator and a second BSS indicator for a BSS associated with the first WLAN device and the second WLAN device. The first BSS indicator and the second BSS indicator may be indicative of a BSS identifier (BSSID) of the BSS. The first WLAN device may output the first HARQ packet for transmission to the second WLAN device. The first HARQ packet may include the first BSS indicator and the second BSS indicator in one or more fields of a physical layer (PHY) header of the first HARQ packet.
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公开(公告)号：US20210036809A1
公开(公告)日：2021-02-04
申请号：US16945605
申请日：2020-07-31
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Jialing Li Chen , Dung Ngoc Doan , Bin Tian , Alfred Asterjadhi
IPC: H04L1/18 , H04B7/0456 , H04W80/02 , H04L1/00 , H04L1/16
Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a hybrid automatic repeat request (HARQ) protocol in a wireless local area network (WLAN). A first WLAN device may transmit a first HARQ frame to a second WLAN device. The first HARQ frame may include initial transmissions of a first plurality of forward error correction (FEC) codewords. The HARQ protocol may support new techniques for feedback, such as a feedback capability in which a bitmap may be used to indicate decoding failures of codewords. The first feedback message may include indicators to change a HARQ configuration parameter based on channel conditions. In some implementations, the second HARQ frame may combine retransmissions regarding the failed codewords with initial transmissions of a second plurality of codewords.
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15.发明申请公开(公告)号：US20200344006A1
公开(公告)日：2020-10-29
申请号：US16852364
申请日：2020-04-17
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Jialing Li Chen , Dung Ngoc Doan , Bin Tian , Youhan Kim , Alfred Asterjadhi
Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a retransmission protocol in a wireless local area network (WLAN). The retransmission protocol may be based on a hybrid automatic repeat request (HARQ) protocol that supports a delayed acknowledgement for a HARQ retransmission based on receiver processing capability. A first WLAN device may determine that a second WLAN device requires more time to process the HARQ retransmission and may transmit a different communication (interlaced within the HARQ process) to either the second WLAN device or a third WLAN device during the time that the second WLAN device is processing the HARQ retransmission.
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Patent Agency Ranking
公开(公告)号：US20180295595A1
公开(公告)日：2018-10-11
申请号：US15944543
申请日：2018-04-03
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Yanjun Sun , Abhishek Pramod Patil , George Cherian , Alfred Asterjadhi , Bin Tian
Abstract: An access point (AP) may determine a time resolution for values indicative of wakeup signal transmission times based on a wakeup schedule of a station (STA) and a clock drift value for the STA and may transmit, to a primary radio of the STA, an indication of the time resolution. The AP may identify a transmission time of a wakeup signal for the STA and determine a value indicative of the transmission time. The AP may transmit, to a wakeup radio of the STA, the wakeup signal as a packet that includes the value indicative of the transmission time. The STA may determine the transmission time of the wakeup signal based on the wakeup schedule, the indication of the time resolution, and the value indicative of the transmission time and may update a local clock timing based on the transmission time.
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公开(公告)号：US20180288717A1
公开(公告)日：2018-10-04
申请号：US15691679
申请日：2017-08-30
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer
Abstract: A communication packet (PHY packet) can include a plurality of subfields with a common symbol sequence that can be used for autocorrelation. The symbol sequence of each subfield may be multiplied by a constant of either +1 or −1, based on a different bit of a maximal length sequence, which can enable cross-correlation. Thus, this packet design enables packet detection, symbol timing recovery, and carrier frequency offset estimation.
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公开(公告)号：US20180236247A1
公开(公告)日：2018-08-23
申请号：US15685780
申请日：2017-08-24
Applicant: QUALCOMM Incorporated
CPC classification number: A61N1/37229 , A61N1/37276 , A61N1/37288 , A61N1/3787 , H01Q1/2216 , H01Q1/2225 , H01Q1/27 , H01Q1/273 , H01Q3/24 , H01Q21/061
Abstract: Techniques described herein address these and other issues by providing an architecture of antennas capable of generating a relatively even H-field without exceeding exposure limits, while solving communication issues at the same time. More specifically techniques described herein are directed toward the use of multiple antennas that enable an interrogator device of a biological measurement and stimulation system to power different groups of medical implants at different times by creating fields in different regions of the brain. By doing this, the interrogator device can independently power and/or communicate with groups of medical implants in these different regions and create more evenly-distributed fields while doing so.
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公开(公告)号：US20180115953A1
公开(公告)日：2018-04-26
申请号：US15788554
申请日：2017-10-19
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Bin Tian , Mazhareddin Taghivand
CPC classification number: H04W52/0229 , H04L27/18 , H04L27/3405 , H04L27/345 , H04W52/0206 , H04W52/0216 , H04W52/028 , H04W84/12 , Y02D70/00 , Y02D70/10 , Y02D70/1262 , Y02D70/14 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/21 , Y02D70/22
Abstract: Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for an access point (AP) that may identify a pending communication for a wireless device and transmit a wakeup message comprising a device specific identifier to a wakeup radio of the wireless device. The wakeup message may include a preamble, a signal field, and a data field. In some cases, the wireless device may demodulate the wakeup message using a phase modulated on-off keying (PM-OOK) modulation. After awakening, the wireless device and the AP may exchange data using the primary radio, which may be a wireless local area network (WLAN) transceiver or a wireless wide area network (WWAN) transceiver. The wireless device may receive the wakeup message using the wakeup radio, decode the message to obtain a device specific identifier, and activate a primary radio to communicate with the AP.
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公开(公告)号：US09525540B1
公开(公告)日：2016-12-20
申请号：US15017500
申请日：2016-02-05
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Peter Pui Lok Ang , Joseph Patrick Burke , Tingfang Ji , Cong Nguyen , Joseph Binamira Soriaga
CPC classification number: H04L7/0012 , H04L5/0007 , H04L5/0053 , H04L7/043 , H04L27/0008 , H04L27/04 , H04L27/2613 , H04L27/2655 , H04L27/2675 , H04L27/2692 , H04W40/005 , H04W52/0229 , H04W52/0283 , Y02D70/1242 , Y02D70/1262 , Y02D70/1264 , Y02D70/142 , Y02D70/146 , Y02D70/164 , Y02D70/21
Abstract: When embedding a signal into a selected subcarrier of a multicarrier downlink waveform of regular data/control signaling, a base station modulates the embedded signal with a different modulation scheme than the other data in the downlink waveform. The base station nulls adjacent subcarriers to minimize interference at a low-power wake-up receiver of an IOE device(s). The IOE device wakes up the low-power wake-up receiver at scheduled times to listen for the signal. For synchronization signals, the IOE device corrects a local clock based on a correlation value of the signal to a predetermined sequence. For wake-up signals, the IOE device correlates whatever is detected at the antenna to a predetermined sequence and compares the correlation value to a predetermined threshold. If the threshold is met, the IOE device registers a wake-up signal and wakes the primary transceiver of the device. If not, the receiver goes back to sleep.
Abstract translation: 当将信号嵌入到常规数据/控制信令的多载波下行链路波形的选定子载波中时，基站以与下行链路波形中的其他数据不同的调制方式来调制嵌入信号。 基站使相邻子载波无效以最小化在IOE设备的低功率唤醒接收机处的干扰。 IOE设备在预定时间唤醒低功耗唤醒接收器以监听信号。 对于同步信号，IOE设备基于信号的相关值到预定的序列来校正本地时钟。 对于唤醒信号，IOE设备将在天线处检测到的任何内容与预定序列相关，并将相关值与预定阈值进行比较。 如果满足阈值，IOE设备将注册唤醒信号并唤醒设备的主收发器。 如果没有，接收机返回睡眠状态。
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