公开(公告)号：US20210075551A1

公开(公告)日：2021-03-11

申请号：US16996139

申请日：2020-08-18

Applicant: Apple Inc.

Inventor： Jarkko L. KNECKT ,  Yong LIU ,  Jinjing JIANG ,  Su Khiong YONG ,  Tianyu WU

IPC: H04L1/18 ,  H04L1/16 ,  H04W52/02

Abstract: Some embodiments of this disclosure include apparatuses and methods for a media access control (MAC) level operation that enables a transmitter and a receiver to select low-density parity check (LDPC) codewords that are HARQ retransmitted. The operations described herein provide for reducing the number of codewords that need to be retransmitted, minimizing the overhead needed to signal the feedback from a receiver to a transmitter, and allowing a transmitter to control which codewords are retransmitted.

公开(公告)号：US20210075542A1

公开(公告)日：2021-03-11

申请号：US17012877

申请日：2020-09-04

Applicant: Apple Inc.

Inventor： Jarkko L. KNECKT ,  Yong LIU ,  Jinjing JIANG ,  Su Khiong YONG ,  Tianyu WU

IPC: H04L1/00 ,  H04L1/18 ,  H04W80/02 ,  H04L1/16

Abstract: Some embodiments of this disclosure include apparatuses and methods for a PHY level operation that enables a transmitter and a receiver to select low-density parity check (LDPC) codewords that are HARQ retransmitted. The operations described herein provide for an increased reliability in detecting codewords at the physical (PHY) layer, as the codeword detection does not depend on detection of a media access control (MAC) protocol data unit (MPDU) start position and length. For example, the PHY layer may store failed codewords without instructions from the MAC layer. This providers for faster and simpler implementation of the PHY layer. Additionally, the operations described herein reduce overhead requirements as the MAC layer may stores a bit stream of correctly received codewords, which requires less the storage space required to store failed codewords. Furthermore, a feedback signal transmitted from a receiving device to a transmitting device may further reduce the number of retransmitted codewords.

公开(公告)号：US20180227917A1

公开(公告)日：2018-08-09

申请号：US15783784

申请日：2017-10-13

Applicant: Apple Inc.

Inventor： Guoqing LI ,  Jarkko L. KNECKT ,  Christiaan A. HARTMAN ,  Yong LIU ,  Su Khiong YONG

IPC: H04W72/04

CPC classification number: H04W72/0453 ,  H04W52/0216 ,  H04W72/0413 ,  H04W72/042 ,  H04W84/12 ,  Y02D70/00 ,  Y02D70/10 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/14 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/166 ,  Y02D70/20 ,  Y02D70/22 ,  Y02D70/26

Abstract: A basic bandwidth wireless local area network (WLAN) device or station (STA) is assigned to a secondary channel. The basic bandwidth STA may be a 20 MHz STA. On the secondary channel, the basic bandwidth STA operates in a wideband mode recovering received data transmitted from an access point (AP) as part of a high bandwidth physical layer protocol data unit (PPDU). The STA and the AP can be members of a basic service set (BSS). The high bandwidth PPDU may be, for example, a 40 MHz, 60 MHz, or 80 MHz PPDU. Once on the secondary channel, the STA relies on the AP to perform channel sensing and scheduling activities, thus reducing power consumption at the STA and increasing the efficiency of the BSS. Several signaling formats are provided for indicating the secondary channel that the STA is assigned to or requests to move to.

公开(公告)号：US20170353921A1

公开(公告)日：2017-12-07

申请号：US15615218

申请日：2017-06-06

Applicant: Apple Inc.

Inventor： Guoqing LI ,  Oren SHANI ,  Yong LIU ,  Christiaan A. HARTMAN ,  Jarkko L. KNECKT ,  Joonsuk KIM ,  Su Khiong YONG

IPC: H04W52/02

Abstract: An access point establishes target wakeup times (TWTs) with one or more associated electronic devices in a WLAN. The access point transitions to a power-saving mode outside of the one or more TWTs. The access point maintains synchronization with the one or more electronic devices, during at least a first TWT in the one or more TWTs, by transmitting, to the one or more electronic devices, a TWT beacon that includes, or in conjunction with, synchronization information. Alternatively or additionally, during at least the first TWT, the access point transmits a multi-user trigger frame that includes the synchronization information to the one or more electronic devices. In response to the multi-user trigger frame, the access point receives data frames from the one or more electronic devices, transmits one or more acknowledgments, and transitions into the power-saving mode during a remainder of at least the first TWT.

公开(公告)号：US20170311318A1

公开(公告)日：2017-10-26

申请号：US15498363

申请日：2017-04-26

Applicant: Apple Inc.

Inventor： Guoqing LI ,  Yong LIU ,  Christiaan A. HARTMAN ,  Ashok RANGANATH ,  Oren SHANI ,  Su Khiong YONG ,  Jarkko L. KNECKT ,  Joonsuk KIM

IPC: H04W72/04 ,  H04L5/00 ,  H04W84/12 ,  H04W88/08

CPC classification number: H04L5/0007 ,  H04L27/2602 ,  H04L47/14 ,  H04W74/06 ,  H04W84/12

Abstract: During operation, an interface circuit in an electronic device may receive, from a second electronic device (such as an access point in a WLAN), an uplink trigger frame that may specify an access category. In response to the uplink trigger frame, the electronic device may first include data associated with the specified access category in one or more frames, and then may transmit the one or more frames to the second electronic device. Moreover, when all the data associated with the specified access category has been transmitted or when there is no data associated with the specified access category, and when there is leftover time in an allocation associated with the uplink trigger frame, the interface circuit may transmit the one or more frames to the second electronic device with additional data associated with another access category that is different from the specified access category.

公开(公告)号：US20170237532A1

公开(公告)日：2017-08-17

申请号：US15432758

申请日：2017-02-14

Applicant: Apple Inc.

Inventor： Guoqing LI ,  Oren SHANI ,  Matthew L. SEMERSKY ,  Ashok RANGANATH ,  Jarkko L. KNECKT ,  Christiaan A. HARTMAN ,  Yong LIU ,  Su Khiong YONG ,  Joonsuk KIM

IPC: H04L5/00 ,  H04W72/12 ,  H04L29/08 ,  H04L27/26 ,  H04B7/0452

Abstract: An electronic device communicates frames with an access point (AP) by receiving, from the AP, a frame header that includes information specifying a first set of tones of an OFDMA communication, the first set of tones associated with first resource block subchannels having a first bandwidth used by the AP to transmit a frame payload. The electronic device obtains a second set of tones associated with second resource block subchannels having a second bandwidth that differs from the first bandwidth, and receives the frame payload using the OFDMA communication, the second resource block subchannels, and the second set of tones. Alternatively, an electronic device dynamically switches a channel-access mode when communicating a frame with the AP depending on whether the communication includes a primary 20 MHz channel. In a technique, an MU-PPDU is communicated using a frame via a non-primary 20 MHz channel without using the primary 20 MHz channel.

公开(公告)号：US20170070418A1

公开(公告)日：2017-03-09

申请号：US15256013

申请日：2016-09-02

Applicant: Apple Inc.

Inventor： Guoqing LI ,  Yong LIU ,  Joonsuk KIM ,  Christiaan A. HARTMAN ,  Su Khiong YONG ,  Syed A. MUJTABA ,  Matthew L. SEMERSKY

IPC: H04L12/761 ,  H04L29/06

CPC classification number: H04L45/16 ,  H04L12/189 ,  H04L61/2069 ,  H04W4/06 ,  H04W76/40

Abstract: Disclosed herein are system, method, and computer program product embodiments for selectively decoding a multicast subframe in a multi-user frame for a wireless communications protocol. Embodiments include transmitting a request frame including a multicast group address for a multicast group to an access point (AP). The AP can determine a multicast identifier for the multicast group based on the multicast group address in the request frame. The AP can also transmit a response frame including the determined multicast identifier to a station (STA). The STA can receive a multi-user frame containing a multicast subframe from the AP. The STA can determine whether the multicast subframe is destined for the STA based on the determined multicast identifier and a multicast identifier stored in a preamble of the multi-user frame. The STA can determine whether to decode the multicast subframe based on the determination of whether the multicast subframe is destined for the STA.

Abstract translation: 这里公开了用于在无线通信协议的多用户帧中选择性地解码多播子帧的系统，方法和计算机程序产品实施例。 实施例包括向接入点（AP）发送包括组播组的组播组地址的请求帧。 AP可以根据请求帧中的组播组地址确定组播组的组播标识符。 AP还可以将包括确定的多播标识符的响应帧发送到站（STA）。 STA可以从AP接收包含多播子帧的多用户帧。 STA可以基于所确定的多播标识符和存储在多用户帧的前同步码中的多播标识符来确定多播子帧是否发往STA。 基于确定多播子帧是否发往STA，STA可以确定是否对多播子帧进行解码。