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公开(公告)号：US11936580B2
公开(公告)日：2024-03-19
申请号：US17566005
申请日：2021-12-30
Applicant: Apple Inc.
Inventor： Joonsuk Kim , Yuchul Kim
CPC classification number: H04L5/0048 , H04L1/12 , H04L1/1854 , H04L27/2656 , H04L27/2657 , H04L27/2675 , H04W56/002 , H04L5/0023 , H04L25/0202 , H04W84/12
Abstract: This disclosure relates to orthogonal frequency division multiple access (OFDMA) communication in wireless local area networks (WLANs). According to some embodiments, a downlink OFDMA frame may be transmitted. An uplink OFDMA frame including acknowledgements associated with the downlink OFDMA frame may be received. The uplink OFDMA frame may be processed, in some instances including determining which devices receiving the downlink OFDMA frame transmitted an acknowledgement associated with the downlink OFDMA frame in the uplink OFDMA frame.
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公开(公告)号：US11877348B2
公开(公告)日：2024-01-16
申请号：US17571304
申请日：2022-01-07
Applicant: Apple Inc.
Inventor： Chiu Ngok E. Wong , Christiaan A. Hartman , Zheng Zeng , Joonsuk Kim , Su Khiong Yong , Yong Liu
CPC classification number: H04W8/183 , H04L69/22 , H04W52/0216 , H04W84/12 , Y02D30/70
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.
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公开(公告)号：US11258561B2
公开(公告)日：2022-02-22
申请号：US16820408
申请日：2020-03-16
Applicant: Apple Inc.
Inventor： Joonsuk Kim , Yuchul Kim
Abstract: This disclosure relates to orthogonal frequency division multiple access (OFDMA) communication in wireless local area networks (WLANs). According to some embodiments, a downlink OFDMA frame may be transmitted. An uplink OFDMA frame including acknowledgements associated with the downlink OFDMA frame may be received. The uplink OFDMA frame may be processed, in some instances including determining which devices receiving the downlink OFDMA frame transmitted an acknowledgement associated with the downlink OFDMA frame in the uplink OFDMA frame.
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公开(公告)号：US10805056B2
公开(公告)日：2020-10-13
申请号：US15336728
申请日：2016-10-27
Applicant: Apple Inc.
Inventor： Guoqing Li , Christiaan A. Hartman , Joonsuk Kim , Su Khiong Yong , Yong Liu
Abstract: A wireless local area network station (STA) changes a receiver operating mode (ROM) and saves power by influencing when a ROM-conforming access point (AP) transmission takes place. The STA evaluates candidate delay regimes after a negotiation exchange with the STA. The STA then instructs the AP of a selected delay regime which the AP is permitted to use when transmitting data according to the changed ROM. The ROM can involve a change in the system bandwidth demodulated by the STA and/or the number of spatial streams demodulated by the STA. The delay regime can allow the AP to transmit with little or no delay based on the changed ROM, or the delay regime may require a fixed time delay before the AP transmits according to the changed ROM.
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公开(公告)号：US20200220685A1
公开(公告)日：2020-07-09
申请号：US16820408
申请日：2020-03-16
Applicant: Apple Inc.
Inventor： Joonsuk Kim , Yuchul Kim
Abstract: This disclosure relates to orthogonal frequency division multiple access (OFDMA) communication in wireless local area networks (WLANs). According to some embodiments, a downlink OFDMA frame may be transmitted. An uplink OFDMA frame including acknowledgements associated with the downlink OFDMA frame may be received. The uplink OFDMA frame may be processed, in some instances including determining which devices receiving the downlink OFDMA frame transmitted an acknowledgement associated with the downlink OFDMA frame in the uplink OFDMA frame.
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Patent Agency Ranking
公开(公告)号：US10194468B2
公开(公告)日：2019-01-29
申请号：US15449652
申请日：2017-03-03
Applicant: Apple Inc.
Inventor： Jarkko Kneckt , Guoqing Li , Christiaan A. Hartman , Joonsuk Kim
Abstract: Determining wireless local area network (WLAN) channel medium usage information by WLAN access points (APs) and WLAN stations (STAs) is disclosed. A new medium access control (MAC) duration field in a request to send (RTS) message provides a duration value to be conveyed in a subsequent clear to send (CTS) message. A channel or bandwidth can then be quickly used if an addressed STA does not respond to the RTS message. Also, a STA recognizes an unexpected silence and accesses the medium when a trigger frame is followed by a CTS timeout interval. In a third embodiment, an AP requests that STAs monitor particular channels to obtain network allocation vector (NAV) information. The STAs then respond (or informatively, do not respond) to RTS messages; thus, allowing the AP and other listening devices to determine channel medium information. The AP can then schedule data exchanges based on the determined information.
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公开(公告)号：US10153868B2
公开(公告)日：2018-12-11
申请号：US15178373
申请日：2016-06-09
Applicant: Apple Inc.
Inventor： Joonsuk Kim , Yuchul Kim , Syed A. Mujtaba
IPC: H04L1/18 , H04L1/00 , H04L12/741 , H04W84/12
Abstract: Apparatus and methods for a hybrid automatic repeat request (H-ARQ) mechanism for wireless communication devices of a wireless local area network (WLAN) are disclosed. Methods and apparatus to determine whether a packet is an original, first transmission or a retransmission of a previously transmitted packet without decoding the payload of the packet are disclosed. Medium access control (MAC) addresses of a transmitter, such as an access point (AP), and a receiver, such as a station (STA), of a WLAN are encoded separately with a retransmission bit to indicate whether the packet is retransmitted. For an aggregated MAC protocol data unit (A-MPDU), a sequence number is included to determine which MAC protocol data units (MPDUs) of the A-MPDU are retransmitted. When retransmission is indicated, the receiver of the STA performs a hybrid automatic repeat request (H-ARQ) process to combine the retransmitted packet with previously received packets.
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公开(公告)号：US10142985B2
公开(公告)日：2018-11-27
申请号：US15099859
申请日：2016-04-15
Applicant: Apple Inc.
Inventor： Chiu Ngok E. Wong , Joonsuk Kim , Christiaan A. Hartman , Guoqing Li , Su Khiong Yong , Yong Liu
Abstract: In embodiments, a wireless device, such as a Wi-Fi device, transmits communication signals on secondary channels within an operational bandwidth of a wireless network, concurrent with a transmission from another wireless device on a primary channel. The wireless device may detect that a first frequency band within an operating bandwidth of a wireless network is occupied by a first transmission transmitted by a second wireless device, and determine that a second, different frequency band within the operating bandwidth of the wireless network is not occupied. In response, the wireless device may transmit a second transmission occupying the second frequency band concurrent with the first transmission. The wireless device may set a duration of the second transmission based at least in part on a determination of whether the second wireless device is configured to assess the state of all frequency bands within the operating bandwidth before beginning a subsequent transmission.
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公开(公告)号：US20180309471A1
公开(公告)日：2018-10-25
申请号：US16022288
申请日：2018-06-28
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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10.发明申请公开(公告)号：US20170142661A1
公开(公告)日：2017-05-18
申请号：US15418854
申请日：2017-01-30
Applicant: Apple Inc.
Inventor： Chiu Ngok E. Wong , Christiaan A. Hartman , Joonsuk Kim , Syed Aon Mujtaba , Yong Liu , Su Khiong Yong
IPC: H04W52/02 , H04L29/06 , H04L12/931 , H04W40/00 , H04W40/24
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.
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