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公开(公告)号：US10034133B2
公开(公告)日：2018-07-24
申请号：US15218434
申请日：2016-07-25
Applicant: Apple Inc.
Inventor： Syed Aon Mujtaba , Xiaowen Wang
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：US10020862B2
公开(公告)日：2018-07-10
申请号：US14871794
申请日：2015-09-30
Applicant: Apple Inc.
Inventor： Xiaowen Wang , Vinay R. Majjigi , Joonsuk Kim , Syed Aon Mujtaba
IPC: H04B7/08 , H04B17/12 , H04B17/318 , H04B7/0413
CPC classification number: H04B7/0817 , H04B7/0413 , H04B7/0877 , H04B17/12 , H04B17/318 , Y02D70/00 , Y02D70/1262 , Y02D70/1264 , Y02D70/142 , Y02D70/144 , Y02D70/168 , Y02D70/26 , Y02D70/444
Abstract: Wireless communication devices with multiple receive (RX) chains may be operated to maintain high performance while saving power. This may be accomplished by evaluating signal strength during transmission of the RX packets, and/or evaluating a possible imbalance (gain difference) between the multiple RX chains within the wireless communication device. Signal strength (or good signal) detection may be enabled when non-MIMO (non-multiple-in-multiple-out) transmissions are taking place, while imbalance detection (antenna gain comparison) may be enabled when a specified number of single-stream packets have been received. Once the decision has been made to operate in a reduced number RX path mode, decision to reactivate one or more additional RX paths may be made based on MIMO detection, a detection of a drop in signal quality, and/or upon expiration of a power save timer.
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公开(公告)号：US20180124739A1
公开(公告)日：2018-05-03
申请号：US15860410
申请日：2018-01-02
Applicant: Apple Inc.
Inventor： Tarik Tabet , Syed Aon Mujtaba , Moustafa M. Elsayed
CPC classification number: H04W68/005 , H04W72/042 , H04W72/0446 , H04W72/048 , H04W76/28
Abstract: For paging user devices that are link budget limited (LBL), a base station transmits a special ID that is used by said devices to identify a paging frame and/or a paging occasion. When transmitting a paging message for an LBL device, the base station may use: (a) larger aggregation and larger CFI (than conventionally allowed) and (b) a larger number of resource blocks (than conventionally allowed) for paging payload. If paging messages for LBL devices saturate the paging frame capacity, the base station may allocate a plurality of special IDs. If paging messages for LBL devices and/or other data transfers saturate network capacity, at least a subset of the LBL devices may be directed to enter a connected-state discontinuous reception (DRX) mode, wherein those devices will remain in connected mode and periodically check for resource allocations. Paging payload information may be repeatedly transmitted in successive subframes, to support soft combining.
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公开(公告)号：US20180020376A1
公开(公告)日：2018-01-18
申请号：US15593702
申请日：2017-05-12
Applicant: Apple Inc.
Inventor： Farouk Belghoul , Lydi Smaini , Tarik Tabet , Syed Aon Mujtaba
CPC classification number: B08B3/08 , B08B3/022 , B08B3/041 , F16H57/01 , F16H2057/012 , G01N27/9033 , H04W16/14 , H04W28/085 , H04W72/0453 , H04W72/1252 , H04W72/14
Abstract: A wireless communication device (UE) may monitor grants received from respective cells associated with one or more first (e.g. licensed) frequency band(s) and one or more second (e.g. unlicensed) frequency band(s). Based on the received grants the UE may determine if an imbalance exists in the radio resource allocation, whereby the UE communicates more than intended in the second frequency band(s). The imbalance may be specified with respect to the ratio or portion of the communications that are conducted in the second frequency band(s) with respect to all wireless communications of the UE. If the UE detects an imbalance, it may transmit a report to the network (e.g. to the base station serving the UE) indicating unfavorable conditions for the UE to be operating in the second frequency band(s). In response, the network may disable the respective cell(s) associated with the second frequency band(s) and/or it may disable carrier aggregation for the UE.
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公开(公告)号：US09872316B2
公开(公告)日：2018-01-16
申请号：US14729360
申请日：2015-06-03
Applicant: Apple Inc.
Inventor： Tarik Tabet , Youngjae Kim , Syed Aon Mujtaba
CPC classification number: H04W74/0833 , H04J13/0062 , H04L1/189 , H04W52/34 , H04W72/0406 , H04W74/004 , Y02B70/30 , Y02D70/00 , Y02D70/1242 , Y02D70/1262 , Y02D70/1264 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/164 , Y02D70/168 , Y02D70/26
Abstract: Enhanced random access procedures for link-budget-limited user equipment (UE) devices are disclosed. A user equipment device may transmit a first message containing a Physical Random Access Channel (PRACH). The PRACH contains instances of a Zadoff-Chu sequence, and may be transmitted repeatedly as part of a single random attempt, to facilitate correlation data combining at the base station. The available Zadoff-Chu sequences may be partitioned among a plurality of sets, each set being associated with a respective Doppler shift range (or frequency hop pattern or time repetition pattern). A UE device may signal Doppler shift (or other information) to the base station by selection of one of the sets. The first PRACH transmission and the following PRACH transmission may occur in consecutive subframes. A UE device may select from a special set of Zadoff-Chu sequences (different from a conventional set of sequences), to signal its status as a link-budget-limited device.
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Patent Agency Ranking
公开(公告)号：US09768825B2
公开(公告)日：2017-09-19
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.
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公开(公告)号：US09763185B2
公开(公告)日：2017-09-12
申请号：US13766055
申请日：2013-02-13
Applicant: Apple Inc.
Inventor： Syed Aon Mujtaba , Youngjae Kim , Kee-Bong Song , Xiaowen Wang , Yuchul Kim
CPC classification number: H04W52/0209 , H04B7/0871 , H04B7/0877 , H04W52/0238 , H04W52/0245 , Y02D70/1242 , Y02D70/1244 , Y02D70/1262 , Y02D70/1264 , Y02D70/146 , Y02D70/24 , Y02D70/25 , Y02D70/444
Abstract: Methods and apparatus for adaptively adjusting receiver operation for e.g., power optimization. In one embodiment, operation during diversity operation is adaptively adjusted. Diversity techniques consume significantly more power than non-diversity operation. However, the performance gain from receiver diversity is not always predictable. Consequently, in one embodiment, a device evaluates the overall performance gain contributed by diversity operation and, where the performance gain is insignificant or inadequate, the device disables diversity operation. In one implementation, the device can operate in a static single antenna mode, a dynamic single antenna mode and a dynamic multiple antenna mode.
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公开(公告)号：US20170251372A1
公开(公告)日：2017-08-31
申请号：US15430664
申请日：2017-02-13
Applicant: Apple Inc.
Inventor： Farouk Belghoul , Lydi Smaini , Tarik Tabet , Syed Aon Mujtaba
Abstract: A wireless communication device may conduct first wireless communications over a first frequency band according to a first radio access technology (RAT), and may detect second wireless communications conducted over the first frequency band according to a second RAT while the wireless communication device is conducting the first wireless communications. The wireless communication device may then adjust characteristics and/or parameters associated with the first wireless communications based on the detected second wireless communications. In a specific example, a wireless communication device conducting Wi-Fi communications in the 5 GHz band may detect cellular communications (e.g. LAA/LTE-U communications) also conducted in the 5 GHz band while the wireless communication device is conducting the Wi Fi communications. The wireless communication device may then adjust characteristics and/or parameters associated with its Wi-Fi communications based on the detected signals/frequencies of the cellular (LAA/LTE-U) communications.
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129.发明授权WLAN system with opportunistic transitioning to a low power state for power management 有权WLAN系统具有机会转换到低功率状态进行电源管理公开(公告)号：US09572105B2
公开(公告)日：2017-02-14
申请号：US14721374
申请日：2015-05-26
Applicant: Apple Inc.
Inventor： Chiu Ngok E. Wong , Christiaan A. Hartman , Joonsuk Kim , Syed Aon Mujtaba , Yong Liu , Su Khiong Yong
CPC classification number: H04W52/0274 , H04L1/0003 , H04L49/201 , H04L69/22 , H04L69/323 , H04W40/005 , H04W40/244 , H04W52/0209 , H04W52/0225 , H04W84/12 , H04W88/02 , Y02D70/00 , Y02D70/1222 , Y02D70/1262 , Y02D70/142 , Y02D70/144 , Y02D70/26
Abstract: Embodiments described herein relate to providing reduced power consumption in wireless communication systems, such as 802.11 WLAN systems. Timing information regarding power save opportunities (PSOPs) may be provided in communication frames, which may inform mobile devices of expected frame exchange periods during which they may transition to a Doze state. Additional PSOP information may be included in beacon frames, which may inform mobile devices of expected multicast periods during which they may transition to a Doze state. This may operate to provide improvements in terms of power consumption.
Abstract translation: 本文描述的实施例涉及在诸如802.11 WLAN系统的无线通信系统中提供降低的功率消耗。 可以在通信帧中提供关于省电机会（PSOP）的定时信息，通信帧可以向移动设备通知其可能转换到打盹状态的预期帧交换周期。 附加的PSOP信息可以被包括在信标帧中，这可以通知移动设备预期的多播时段，在此期间，它们可以转换到打盹状态。 这可以在功率消耗方面提供改进。
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公开(公告)号：US20170034869A1
公开(公告)日：2017-02-02
申请号：US15290908
申请日：2016-10-11
Applicant: Apple Inc.
Inventor： Sarma V. Vangala , Tarik Tabet , Venkateswara Rao Manepalli , Madhusudan Chaudhary , Faraz Faheem , Syed Aon Mujtaba , Jianxiong Shi , Sreevalsan Vallath
CPC classification number: H04W76/27 , H04L1/1832 , H04W28/0268 , H04W40/005 , H04W72/1242 , H04W84/042 , H04W88/02
Abstract: This disclosure relates to techniques for scheduling radio resource control connections between a wireless device and a network element of a network in advance. According to some embodiments, a wireless device may provide an indication of one or more types of upcoming data traffic to the network element. The network element may schedule one or more radio resource control connections for the wireless device based at least in part on the indication of one or more types of upcoming data traffic. The network element may provide an indication of the scheduled radio resource control connection(s) to the wireless device. The wireless device and the network may establish the scheduled radio resource control connection at the scheduled time.
Abstract translation: 本公开涉及用于预先在无线设备和网络的网络元件之间调度无线电资源控制连接的技术。 根据一些实施例，无线设备可以向网络元件提供一种或多种类型的即将到来的数据业务的指示。 网络元件可以至少部分地基于一种或多种类型的即将到来的数据业务的指示来调度无线设备的一个或多个无线电资源控制连接。 网络元件可以向无线设备提供调度的无线电资源控制连接的指示。 无线设备和网络可以在预定时间建立调度的无线电资源控制连接。
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