公开(公告)号：US20170347370A1

公开(公告)日：2017-11-30

申请号：US15605158

申请日：2017-05-25

Applicant: Apple Inc.

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

IPC: H04W74/00 ,  H04W74/08 ,  H04W84/12

CPC classification number: H04W74/006 ,  H04W84/12 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/14 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/166 ,  Y02D70/20 ,  Y02D70/22 ,  Y02D70/26

Abstract: An electronic device that transmits a frame to a second electronic device is described. In particular, during operation, an interface circuit in the electronic device (such as an access point in a WLAN) may transmit the frame to the second electronic device using a Wi-Fi communication protocol. The frame may include information cancelling a previously specified NAV protected time in a preamble of the frame. For example, the information may include a CF-End indication. Moreover, the information may be included in a MAC header of the frame and, more generally, in a preamble of a high efficiency (HE) physical layer convergence protocol (PLCP) protocol data unit (PPDU). Furthermore, the electronic device may transmit the frame in response to a block acknowledgment (BA) from the second electronic device.

公开(公告)号：US20170257888A1

公开(公告)日：2017-09-07

申请号：US15449652

申请日：2017-03-03

Applicant: Apple Inc.

Inventor： Jarkko KNECKT ,  Guoqing LI ,  Christiaan A. HARTMAN ,  Joonsuk KIM

IPC: H04W74/08

CPC classification number: H04W74/0816 ,  H04W84/12

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.

公开(公告)号：US20170126461A1

公开(公告)日：2017-05-04

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

IPC: H04L27/26 ,  H04W72/04

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.

公开(公告)号：US20170041798A1

公开(公告)日：2017-02-09

申请号：US15230090

申请日：2016-08-05

Applicant: Apple, Inc

Inventor： Guoqing LI ,  Yong LIU ,  Joonsuk KIM ,  Christiaan A. HARTMAN ,  Chiu Ngok E. WONG ,  Syed Aon MUJTABA ,  Matt SEMERSKY ,  Su Khiong YONG

IPC: H04W16/02 ,  H04W74/08 ,  H04W72/04

CPC classification number: H04W74/0816

Abstract: Disclosed herein are system, method, and computer program product embodiments for enabling a spatial reuse opportunity at a high efficiency (HE) station and a network allocation vector (NAV) reset capability at a legacy station using a Request to Send and/or Clear to Send (RTS and/or CTS) frame. For example, the method can include receiving a RTS frame with a redefined field that specifies spatial reuse information. The NAV can be set based on the RTS frame. The method can determine whether a second frame was received within a threshold time after a Short Interframe Space (SIFS). Finally, the method can reset the NAV based on whether the second frame was received within the threshold time.

Abstract translation: 本文公开了一种系统，方法和计算机程序产品实施例，其使得能够在高效率（HE）站处实现空间重用机会，并且使用发送请求和/或清除至 发送（RTS和/或CTS）帧。 例如，该方法可以包括接收具有指定空间重用信息的重定义字段的RTS帧。 可以基于RTS帧设置NAV。 该方法可以确定在短帧间间隔（SIFS）之后的阈值时间内是否接收到第二帧。 最后，该方法可以基于在阈值时间内是否接收到第二帧来重置NAV。

公开(公告)号：US20180083793A1

公开(公告)日：2018-03-22

申请号：US15710708

申请日：2017-09-20

Applicant: Apple Inc.

Inventor： Joonsuk KIM ,  Young Jae KIM

IPC: H04L12/18 ,  H04L12/761

CPC classification number: H04L12/1877 ,  H04L12/185 ,  H04L12/1863 ,  H04L12/189 ,  H04L45/16 ,  H04W72/005

Abstract: Methods and apparatus for transmission of data streams using a multicast packet format based on group identifiers (Group IDs) to deliver data to multiple recipient stations (STAs). Using Group IDs, an access point (AP) assigns multiple STAs to one or more groups, and uniquely assigns each STA to a particular position within the group, such that it can receive a requested data stream. A Group ID management action frame provided by the AP to an individual STA indicates to which group (or groups) the STA is assigned and the STA's position within the group, with which information the STA can determine whether a packet is intended for the STA and which portion of the packet to decode in order to receive requested data streams.

公开(公告)号：US20180027485A1

公开(公告)日：2018-01-25

申请号：US15653825

申请日：2017-07-19

Applicant: Apple Inc.

Inventor： Jarkko L. KNECKT ,  Christiaan A. HARTMAN ,  Guoqing LI ,  Joonsuk KIM ,  Matthew L. SEMERSKY ,  Oren SHANI ,  Syed A. MUJTABA ,  Yong LIU

IPC: H04W48/14 ,  H04W4/00 ,  H04W8/00 ,  H04B17/318

CPC classification number: H04W48/14 ,  H04B7/00 ,  H04B17/318 ,  H04W4/00 ,  H04W4/80 ,  H04W8/005 ,  H04W24/00 ,  H04W68/00 ,  H04W84/12

Abstract: Passive and active scanning for extended range wireless networking. The choice between legacy and extended range signaling can depend on one or more factors. For passive scanning, an electronic device may transmit a combination of legacy beacons and extended range beacons for network discovery by receiving electronic devices. For active scanning, an electronic device may transmit extended range probe requests in addition to legacy probe requests to discover all of the access points within its transmission range. Responses to probe requests can use extended range, legacy, single user, and/or multi user protocols.

公开(公告)号：US20170202015A1

公开(公告)日：2017-07-13

申请号：US15403092

申请日：2017-01-10

Applicant: Apple Inc.

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

IPC: H04W74/02 ,  H04W74/00

CPC classification number: H04W74/02 ,  H04W74/006 ,  H04W84/12

Abstract: An access point selects a channel access policy for an electronic device in a wireless local area network (WLAN). During operation, an interface circuit of the access point receives a channel access preference from the electronic device. The channel access preference includes: a multi-user trigger-based channel access technique, a single-user contention-based channel access technique, or both. The interface circuit selects the channel access policy for the electronic device based, at least in part, on the received channel access preference. The channel access policy can also be selected based at least in part on a communication performance metric associated with communication in the WLAN. The interface circuit communicates the selected channel access policy to the electronic device, which subsequently accesses a communication channel and communicates packets with the access point in accordance with the channel access policy.

公开(公告)号：US20170093600A1

公开(公告)日：2017-03-30

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

IPC: H04L25/02 ,  H04L5/00

CPC classification number: H04L25/0224 ,  H04L5/0037 ,  H04L5/0048 ,  H04W84/12

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.

公开(公告)号：US20160330741A1

公开(公告)日：2016-11-10

申请号：US15147365

申请日：2016-05-05

Applicant: Apple Inc.

Inventor： Joonsuk KIM ,  Guoqing Li ,  Syed Aon Mujtaba

IPC: H04W72/04 ,  H04W52/14

Abstract: Systems and methods of providing control information to wireless devices accessing a wireless network are provided. According to some embodiments, a method of wireless communication is provided. According to the method, a first wireless communication channel is assigned to a first wireless device. A second wireless communication channel is assigned to a second wireless device. A third wireless communication channel is designated for use as a control channel that is common to the first and second wireless devices and control information is transmitted to the first and second wireless devices via the third wireless communication channel.

Abstract translation: 提供了向接入无线网络的无线设备提供控制信息的系统和方法。 根据一些实施例，提供了一种无线通信的方法。 根据该方法，第一无线通信信道被分配给第一无线设备。 第二无线通信信道被分配给第二无线设备。 第三无线通信信道被指定为用作第一和第二无线设备公共的控制信道，并且控制信息经由第三无线通信信道被发送到第一和第二无线设备。

公开(公告)号：US20160309473A1

公开(公告)日：2016-10-20

申请号：US15133952

申请日：2016-04-20

Applicant: Apple Inc.

Inventor： Joonsuk KIM ,  Guoqing LI ,  Syed Aon MUJTABA

IPC: H04W72/04 ,  H04L5/00

CPC classification number: H04L5/0094 ,  H04L5/0007 ,  H04L27/2613 ,  H04L27/2647

Abstract: Disclosed herein are system, method, and computer program product embodiments for providing an efficient way to signal a tone mapping in a wireless communication protocol. Embodiments operate by receiving a frame for a wireless communications protocol. The embodiments extract a unique value from a tone mapping field in a preamble of the frame. The embodiments look up a resource block allocation for a portion of the tone space in a lookup table using the unique value. The embodiments map the tones of the portion of the tone space to one or more resource blocks based at least in part on the determined resource block allocation.

Abstract translation: 这里公开的是用于提供用于在无线通信协议中发送音调映射的有效方式的系统，方法和计算机程序产品实施例。 实施例通过接收无线通信协议的帧来操作。 这些实施例从帧的前导码中的色调映射字段中提取唯一值。 实施例使用唯一值查找查找表中的音调空间的一部分的资源块分配。 这些实施例至少部分地基于所确定的资源块分配，将音调空间的该部分的音调映射到一个或多个资源块。