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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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公开(公告)号：US20170188192A1
公开(公告)日：2017-06-29
申请号：US15218434
申请日：2016-07-25
Applicant: Apple Inc.
Inventor： Syed Aon Mujtaba , Xiaowen Wang
CPC classification number: H04W4/023 , G01S11/02 , G01S11/08 , H04L27/0008 , H04L27/18 , H04L27/2607 , H04L27/2613 , H04L27/2662 , H04L27/2675 , H04L27/2692 , H04W64/00
Abstract: Some embodiments relate to a waveform design for time-of-flight estimation in a wireless communication system. The waveform may include a number N of signal tones, wherein the number N of signal tones is greater than a number M of signal tones that the receiving wireless device is configured to decode. Upon receipt of the waveform, the receiving wireless device may store a timestamp which indicates a time of receipt of the waveform. The receiving wireless device may decode M of the N signal tones. For example, the receiving wireless device may decode the middle M signal tones of the N signal tones. One or more of the transmitting or receiving wireless devices may then estimate a distance between them based at least in part on the timestamp.
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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：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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Patent Agency Ranking
公开(公告)号：US20160127007A1
公开(公告)日：2016-05-05
申请号：US14871756
申请日：2015-09-30
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.
Abstract translation: 无线通信设备（UE）可以包括多个接收（RX）链和相关联的天线，以及与RX链中的一个共同定位的至少一个发射（TX）链。 UE可以在接收来自UE打算发送分组的相关接入点（AP）设备的分组期间跟踪天线增益的即时衰落。 UE还可以使用在UE内的多个RX链处接收的任何分组来跟踪长期天线增益。 在切换时刻，由UE决定是否切换天线。 如果瞬时衰落检测是基于在切换时刻之前的指定时间段之前接收的分组，则UE可以基于即时衰落跟踪的结果进行切换决定。 否则，UE可以基于长期天线增益跟踪的结果进行切换决定。
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57.发明授权Adaptive receive diversity during discontinuous reception in mobile wireless device 有权移动无线设备不连续接收期间的自适应接收分集公开(公告)号：US09312943B2
公开(公告)日：2016-04-12
申请号：US14249263
申请日：2014-04-09
Applicant: Apple Inc.
Inventor： Syed A. Mujtaba , Xiaowen Wang , Young Jae Kim , Vinay R. Majjigi , Johnson O. Sebeni , Tahir Shamim , Karthik Anantharaman , Kee-Bong Song , Romain Trilling
CPC classification number: H04B7/082 , H04B7/0817 , H04B7/0871 , H04L43/0823
Abstract: A mobile wireless device adapts receive diversity during discontinuous reception based on downlink signal quality, page indicators and page messages. When the downlink signal quality exceeds a pre-determined threshold, the mobile wireless device decodes a page indicator channel through an initial antenna, and otherwise, decodes a paging channel through the initial antenna without decoding the page indicator channel. The mobile wireless device switches to decoding the paging channel through an alternate antenna when a page indicator decodes as an erasure. When a paging message received through a single antenna decodes with an incorrect error checking code, the mobile wireless devices enables receive diversity through multiple antennas for subsequent decoding. The mobile wireless device switches between single antenna reception and multiple antenna reception based on tracking multiple consecutive error checking code failures and successes.
Abstract translation: 移动无线设备基于下行链路信号质量，页面指示符和寻呼消息来适应不连续接收期间的接收分集。 当下行链路信号质量超过预定阈值时，移动无线设备通过初始天线解码页面指示符信道，否则，通过初始天线对寻呼信道进行解码，而不对页面指示符信道进行解码。 当页面指示符被解码为擦除时，移动无线设备切换到通过替代天线解码寻呼信道。 当通过单个天线接收的寻呼消息用不正确的错误校验码进行解码时，移动无线设备能够通过多个天线进行接收分集以进行后续解码。 基于跟踪多个连续的错误检查代码故障和成功，移动无线设备在单天线接收和多天线接收之间切换。
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58.发明申请Peer to Peer Mobile User Equipment Communication with On-Demand Discovery Signal Transmission 审中-公开对等移动用户设备与按需发现信号传输的通信公开(公告)号：US20160100304A1
公开(公告)日：2016-04-07
申请号：US14870763
申请日：2015-09-30
Applicant: Apple Inc.
Inventor： Yuchul Kim , Xiaowen Wang , Tarik Tabet , Dawei Zhang , Syed Aon Mujtaba
CPC classification number: H04W8/005 , H04W52/0241 , H04W76/14 , Y02D70/00 , Y02D70/1242 , Y02D70/1262 , Y02D70/1264 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/164 , Y02D70/168 , Y02D70/26
Abstract: In some embodiments, a user equipment device (UE) implements a method for discovering the presence of neighboring UEs using an on-demand discovery signal transmission technique. This discovery process may be performed to enable the UEs to perform peer-to-peer communications with each other, wherein peer-to-peer communications is defined as direct communication between the UEs without involving a base station. The UE may be configured to transmit a discovery request signal when it has moved greater than a threshold amount since transmission of a prior discovery request signal. The discovery request signal causes one or more neighboring UEs to each transmit a discovery signal in response, and also causes the UE which generated the discovery request signal to transmit its own discovery signal. The received discovery signal from each of the neighboring UEs is useable to discover, or detect the presence of, these neighboring UEs.
Abstract translation: 在一些实施例中，用户设备设备（UE）使用按需发现信号传输技术来实现用于发现相邻UE的存在的方法。 可以执行该发现过程以使得UE能够彼此执行对等通信，其中将对等通信定义为在不涉及基站的情况下在UE之间的直接通信。 UE可以被配置为当发现先前的发现请求信号已经移动大于阈值量时，发送发现请求信号。 发现请求信号使得一个或多个相邻UE每个响应地发送发现信号，并且还使产生发现请求信号的UE发送其自己的发现信号。 来自每个相邻UE的接收到的发现信号可用于发现或检测这些相邻UE的存在。
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公开(公告)号：US20150296396A1
公开(公告)日：2015-10-15
申请号：US14750534
申请日：2015-06-25
Applicant: Apple Inc.
Inventor： Syed Aon Mujtaba , Wen Zhao , Xiaowen Wang , Vinay Majjigi , Isabel G. Mahe
CPC classification number: H04W24/08 , H04B1/26 , H04B7/0602 , H04B7/0802 , H04W24/00 , H04W68/00 , H04W88/06 , H04W88/10
Abstract: Electronic devices may be provided that contain wireless communication circuitry. The wireless communication circuitry may include radio-frequency transceiver circuitry coupled to antennas by switching circuitry. Multiple radio access technologies may be supported. A device may include first and second antennas. Control circuitry can configure the transceiver circuitry and switching circuitry to support operation of the device in active and idle modes for each radio access technology. In some configurations, both antennas may be used to support operations associated with one of the radio access technologies. In other configurations, the first antenna may be used to support operations with a first of the radio access technologies while the second antenna is used to support operations with a second of the radio access technologies.
Abstract translation: 可以提供包含无线通信电路的电子设备。 无线通信电路可以包括通过开关电路耦合到天线的射频收发器电路。 可以支持多种无线电接入技术。 设备可以包括第一和第二天线。 控制电路可以配置收发器电路和开关电路，以支持每个无线电接入技术在主动和空闲模式下的设备操作。 在一些配置中，两个天线可以用于支持与无线电接入技术之一相关联的操作。 在其他配置中，第一天线可以用于支持具有第一无线电接入技术的操作，而第二天线用于支持具有第二无线电接入技术的操作。
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公开(公告)号：US20140314044A1
公开(公告)日：2014-10-23
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: H04W8/00 , H04B1/7143
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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