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公开(公告)号：US10306476B2
公开(公告)日：2019-05-28
申请号：US15498358
申请日：2017-04-26
Applicant: Apple Inc.
Inventor： Guoqing Li , Christiaan A. Hartman , Jarkko Kneckt , Yong Liu , Su Khiong Yong , Joonsuk Kim , Oren Shani
IPC: H04L29/06 , H04L5/14 , H04L12/24 , H04W16/02 , H04W52/36 , H04W74/00 , H04W84/12 , H04W88/08 , H04L12/931
Abstract: An interface circuit in an electronic device may receive, from an access point associated with the electronic device, a frame with management information that enables the electronic device to use a spatial-reuse technique, where the electronic device, through the spatial-reuse technique, adjusts a transmit power and a channel-availability sensing threshold. Moreover, the management information may specify parameters for the spatial-reuse technique. Then, the electronic device may transmit, using the spatial-reuse technique, one or more frames to the access point based on the parameters. Furthermore, the electronic device may transmit, to the access point, feedback information that indicates communication performance during the communication between the electronic device and the access point. For example, the feedback information may include a retry rate and, more generally, communication-performance information. This feedback information may be used by the access point to modify the parameters.
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公开(公告)号：US10277424B2
公开(公告)日：2019-04-30
申请号：US15279260
申请日：2016-09-28
Applicant: Apple Inc.
Inventor： Guoqing Li , Joonsuk Kim , Yong Liu , Christiaan A. Hartman , Su Khiong Yong
Abstract: Time, frequency and waveform division multiplex schemes are used to efficiently estimate multiple uplink channels in a Wireless Local Area Network (WLAN). Orthogonal Frequency Division Multiple Access (OFDMA) and multi-user Multiple Input Multiple Output (MU-MIMO) approaches provide efficient uplink data transmission. An Access Point (AP) communicates with multiple Stations (STAs) in the WLAN. In some approaches, two or more STAs are addressed and the two or more STAs respond at the same time. The AP receives a composite signal and separates the responses to estimate the uplink channel from each STA. After the AP learns the uplink channels, the AP triggers data transmission from one or more of the WLAN STAs by sending a synchronizing trigger message. In some embodiments, the STAs respond simultaneously with data transmissions to the AP.
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公开(公告)号：US10129826B2
公开(公告)日：2018-11-13
申请号：US15142212
申请日：2016-04-29
Applicant: Apple Inc.
Inventor： Chiu Ngok E. Wong , Syed A. Mujtaba , Christiaan A. Hartman , Joonsuk Kim
Abstract: A station (STA) of a wireless local area network (WLAN) transitions implicitly between power management (PM) modes or PM states, without providing an explicit indication of the PM mode/state change to an access point (AP) of the WLAN. Transitions include changes between an active mode and a power save (PS) mode, or between an awake state and a doze state of the PS mode. Transitions occur immediately after receipt of a beacon indicating pending data for the STA, after an offset time indicated in the beacon, or at a specific wake time negotiated with the AP. After data reception is complete, the STA transitions implicitly to the PS mode or a doze state of the PS mode, after a power save inactivity timeout period or after receiving an indication that data transmission is complete.
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公开(公告)号：US09948546B2
公开(公告)日：2018-04-17
申请号：US15228839
申请日：2016-08-04
Applicant: Apple Inc.
Inventor： Joonsuk Kim , Syed Aon Mujtaba , Xiaowen Wang
CPC classification number: H04L45/26 , H04L27/2613 , H04L27/2666 , H04W84/12
Abstract: An auto-detection scheme may be applied to a physical layer (PHY) preamble of a communications packet, such as an 802.11 packet, to identify which generation of a communication standard was used to generate the packet. A packet of a wireless transmission may be received by a wireless device. The packet may include a PHY preamble, including a first field, such as a legacy long training field (L-LTF), and a second, subsequent field, such as a non-legacy Signal field. The wireless device may determine that the first field is encoded using a Fast-Fourier Transform (FFT) of a first size, and that the second field is encoded using a FFT of a second, different size. This determining may identify a generation of the communication standard used to generate the packet. In response to the determining, the wireless device may decode the packet according to the identified generation of the communication standard.
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公开(公告)号：US20180006677A1
公开(公告)日：2018-01-04
申请号：US15707246
申请日：2017-09-18
Applicant: Apple Inc.
Inventor： Xiaowen Wang , Syed Aon Mujtaba , Vinay R. Majjigi , Joonsuk Kim
Abstract: Wireless communication devices (UEs) may include multiple receive (RX) chains and associated antennas, and at least one transmit (TX) chain co-located with one of the RX chains. The UE may track instant fading of the antenna gain(s) during reception of packets from an associated access point (AP) device to which the UE intends to transmit packets. The UE may also track long term antenna gain(s), using any packets received at the multiple RX chains within the UE. At a switching occasion, a decision is made by the UE whether to switch antennas. If the instant fading detection is based on packets received no later than a specified time period prior to the switching occasion, then the UE may make the switching decision based on the results of the instant fading tracking. Otherwise, the UE may make the switching decision based on the results of the long term antenna gain tracking.
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Patent Agency Ranking
公开(公告)号：US20170245216A1
公开(公告)日：2017-08-24
申请号：US15592355
申请日：2017-05-11
Applicant: Apple Inc.
Inventor： Syed Aon Mujtaba , Joonsuk Kim
CPC classification number: H04W52/0238 , H04W28/0221 , H04W84/12 , Y02D70/00 , Y02D70/122 , Y02D70/1242 , Y02D70/1262 , Y02D70/1264 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/164 , Y02D70/168 , Y02D70/26
Abstract: This disclosure relates to low energy communication techniques. According to some embodiments, a wireless transmission may be received by a wireless device. The wireless transmission may include a physical layer (PHY) preamble and PHY data. The PHY preamble may include destination information indicating a destination and length information indicating a length (or duration) of the wireless transmission. The destination and length information may be included prior to a portion of the PHY preamble configured for channel estimation. The wireless device may determine whether the wireless transmission is destined to the wireless device based on the destination information. If the wireless transmission is not destined to the wireless device, the wireless device may drop a remainder of the wireless transmission.
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公开(公告)号：US20170063670A1
公开(公告)日：2017-03-02
申请号：US15228839
申请日：2016-08-04
Applicant: Apple Inc.
Inventor： Joonsuk Kim , Syed Aon Mujtaba , Xiaowen Wang
IPC: H04L12/721 , H04L29/06 , H04L27/26 , H04L29/08
CPC classification number: H04L45/26 , H04L27/2613 , H04L27/2666 , H04W84/12
Abstract: An auto-detection scheme may be applied to a physical layer (PHY) preamble of a communications packet, such as an 802.11 packet, to identify which generation of a communication standard was used to generate the packet. A packet of a wireless transmission may be received by a wireless device. The packet may include a PHY preamble, including a first field, such as a legacy long training field (L-LTF), and a second, subsequent field, such as a non-legacy Signal field. The wireless device may determine that the first field is encoded using a Fast-Fourier Transform (FFT) of a first size, and that the second field is encoded using a FFT of a second, different size. This determining may identify a generation of the communication standard used to generate the packet. In response to the determining, the wireless device may decode the packet according to the identified generation of the communication standard.
Abstract translation: 自动检测方案可以应用于诸如802.11分组的通信分组的物理层（PHY）前导码，以标识哪一代通信标准被用于生成分组。 无线传输的分组可以由无线设备接收。 分组可以包括PHY前导码，其包括诸如传统长训练字段（L-LTF）的第一字段，以及第二后续字段，诸如非传统信号字段。 无线设备可以使用第一大小的快速傅立叶变换（FFT）来确定第一字段的编码，并且使用第二大小不同的FFT对第二字段进行编码。 该确定可以标识用于生成分组的通信标准的生成。 响应于确定，无线设备可以根据所识别的通信标准的生成来解码分组。
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公开(公告)号：US20170012756A1
公开(公告)日：2017-01-12
申请号：US15203646
申请日：2016-07-06
Applicant: Apple Inc.
Inventor： Guoqing LI , Yong Liu , Joonsuk Kim , Chiu Ngok E. Wong , Christiaan A. Hartman , Su Khiong Yong , Syed A. Mujtaba
CPC classification number: H04L1/18 , H04L1/1614 , H04L1/1685
Abstract: Disclosed herein are system, method, and computer program product embodiments for performing multiuser block acknowledgement in a wireless communication protocol. Embodiments include receiving a control frame from an access point (AP). A transmission mode can be determined based on a trigger information field in the control frame. Further, a data frame to acknowledge can be determined based on a block acknowledgement request (BAR) field in the control frame. A block acknowledgment (BA) frame can be generated based on the data frame to acknowledge. The BA frame can then be transmitted to the AP based on the transmission mode, e.g., at the same time another BA frame is transmitted to the AP by another station.
Abstract translation: 本文公开了用于在无线通信协议中执行多用户块确认的系统，方法和计算机程序产品实施例。 实施例包括从接入点（AP）接收控制帧。 可以基于控制帧中的触发信息字段来确定传输模式。 此外，可以基于控制帧中的块确认请求（BAR）字段来确定要确认的数据帧。 可以基于要确认的数据帧生成块确认（BA）帧。 然后可以基于传输模式将BA帧发送到AP，例如，同时另一个BA帧由另一个站传输到AP。
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公开(公告)号：US09380445B2
公开(公告)日：2016-06-28
申请号：US14252258
申请日：2014-04-14
Applicant: APPLE INC.
Inventor： Yuchul Kim , Young Jae Kim , Joonsuk Kim , Xiaowen Wang , Vinay Majjigi , Syed Aon Mujtaba , Dawei Zhang
IPC: H04B1/7143 , H04W8/00
CPC classification number: H04W8/005 , H04B1/7143
Abstract: A device and method generates a hopping scheme for mobile stations of a wireless network. The method includes receiving a number of channels N of the wireless network. The method includes generating a shuffling matrix as a function of the number of channels N, each row of the shuffling matrix being indicative of a respective one of the mobile stations, each column of the shuffling matrix being indicative of a respective broadcast time of a discovery signal in a hopping scheme. The method includes generating the hopping scheme for the mobile stations in the channels as a function of the shuffling matrix. The hopping scheme maximizes an interval between two consecutive broadcast times that any two of the mobile stations are assigned to transmit discovery signals on adjacent channels.
Abstract translation: 一种设备和方法为无线网络的移动台生成跳频方案。 该方法包括接收无线网络的多个信道N. 该方法包括根据通道数N的函数产生混洗矩阵，混洗矩阵的每一行表示移动站中的相应一个，混洗矩阵的每一列表示发现的相应广播时间 信号在跳频方案。 该方法包括根据混洗矩阵来生成信道中的移动站的跳频方案。 跳频方案最大化两个连续广播时间之间的间隔，任何两个移动台被分配用于在相邻信道上发送发现信号。
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公开(公告)号：US20160183186A1
公开(公告)日：2016-06-23
申请号：US15055801
申请日：2016-02-29
Applicant: Apple Inc.
Inventor： Chiu Ngok E. Wong , Christiaan A. Hartman , Guoqing Li , Jarkko Lauri Sakari Kneckt , Joonsuk Kim
CPC classification number: H04W52/0216 , H04L69/22 , H04W4/50 , H04W8/183 , H04W84/12 , Y02D70/00 , Y02D70/1262 , Y02D70/142 , Y02D70/144 , Y02D70/22 , Y02D70/26
Abstract: Embodiments described herein relate to a system and method for providing flexible receiver configuration in wireless communication systems, such as 802.11 WLAN systems. In one embodiment, a wireless device may transmit a first data frame including first configuration information specifying a first configuration of the receiver to notify a remote device that the wireless device intends to configure its receiver according to the first configuration. After receiving an acknowledgement frame confirming the first configuration information, the wireless device may configure the receiver according to the first configuration. In another embodiment, a wireless device may receive a first data frame including first configuration information and further including a request that the wireless device configure its receiver according to the first configuration. In response, the wireless device may configure the receiver according to the first configuration. In either case, the wireless device may receive subsequent communications according to the first configuration.
Abstract translation: 本文描述的实施例涉及用于在诸如802.11 WLAN系统的无线通信系统中提供灵活的接收机配置的系统和方法。 在一个实施例中，无线设备可以发送包括指定接收机的第一配置的第一配置信息的第一数据帧，以通知远程设备，根据第一配置，无线设备旨在配置其接收机。 在接收到确认第一配置信息的确认帧之后，无线设备可以根据第一配置来配置接收机。 在另一个实施例中，无线设备可以接收包括第一配置信息的第一数据帧，并且还包括无线设备根据第一配置配置其接收机的请求。 作为响应，无线设备可以根据第一配置来配置接收机。 在任一情况下，无线设备可以根据第一配置接收后续通信。
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