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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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公开(公告)号：US20160007226A1
公开(公告)日：2016-01-07
申请号：US14747129
申请日：2015-06-23
Applicant: Apple Inc.
Inventor： Yuchul Kim , Joonsuk Kim
CPC classification number: H04W28/0236 , H04L43/0888 , H04L43/0894 , H04W24/08 , H04W28/0231 , H04W48/18
Abstract: This disclosure relates to determining load and estimating throughput of wireless networks by a wireless device. According to some embodiments, the numbers of active downlink and uplink nodes in a wireless network may be determined. Channel utilization of the wireless network may also be determined. An uplink data rate and a downlink data rate of the wireless device in the wireless network may be estimated. Based on the numbers of active downlink and uplink nodes, channel utilization, and the uplink data rate and a downlink data rate of the wireless device, the maximum possible uplink throughput and downlink throughput of the wireless device in the wireless network may be estimated. Such throughput estimates may be used to select a wireless network to join from among multiple available wireless networks.
Abstract translation: 本公开涉及确定无线设备的负载和估计无线网络的吞吐量。 根据一些实施例，可以确定无线网络中的活动下行链路和上行链路节点的数量。 也可以确定无线网络的信道利用率。 可以估计无线网络中的无线设备的上行链路数据速率和下行链路数据速率。 基于活动下行链路和上行链路节点的数量，信道利用率以及无线设备的上行链路数据速率和下行链路数据速率，可以估计无线网络中无线设备的最大可能的上行链路吞吐量和下行链路吞吐量。 可以使用这种吞吐量估计来选择从多个可用无线网络中加入的无线网络。
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公开(公告)号：US20150207578A1
公开(公告)日：2015-07-23
申请号：US14502780
申请日：2014-09-30
Applicant: Apple Inc.
Inventor： Harish Ramamurthy , Joonsuk Kim , Yong Liu , Christopher J. Hansen
IPC: H04J1/08
CPC classification number: H04W72/0453 , H04W84/12 , H04W88/08
Abstract: A multichannel wireless local area network (WLAN) using multiple radio frequency (RF) channels simultaneously for a basic service set (BSS) is described. The multichannel WLAN provides efficient use of RF bandwidth and improves throughput. An access point of the multichannel WLAN communicates with client devices using at least two parallel RF channels, which can be located in two different RF bands. The access point supports connections to client devices using a “legacy” mode over a single logical channel mapped to a single RF channel and includes data traffic, control traffic, and management frames combined. The access point also supports connections to client devices using a high efficiency WLAN mode having multiple logical channels, each logical channel associated with one or more physical RF channels. The multiple logical channels include a management channel for management frames and a separate high efficiency WLAN data channel to carry data traffic and control traffic.
Abstract translation: 描述了为基本服务集（BSS）同时使用多个射频（RF）信道的多信道无线局域网（WLAN）。 多通道WLAN提供有效利用RF带宽并提高吞吐量。 多通道WLAN的接入点使用至少两个可以位于两个不同RF频带中的并行RF信道与客户端设备进行通信。 接入点支持通过映射到单个RF信道的单个逻辑信道上的“传统”模式连接到客户端设备，并且包括组合的数据业务，控制业务和管理帧。 接入点还支持使用具有多个逻辑信道的高效率WLAN模式到每个逻辑信道与一个或多个物理RF信道相关联的客户端设备的连接。 多个逻辑信道包括用于管理帧的管理信道和单独的高效率WLAN数据信道来承载数据业务并控制业务。
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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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公开(公告)号：US11438188B2
公开(公告)日：2022-09-06
申请号：US15710708
申请日：2017-09-20
Applicant: Apple Inc.
Inventor： Joonsuk Kim , Young Jae Kim
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.
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Patent Agency Ranking
公开(公告)号：US11418999B2
公开(公告)日：2022-08-16
申请号：US15428959
申请日：2017-02-09
Applicant: Apple Inc.
Inventor： Guoqing Li , Christiaan A. Hartman , Oren Shani , Matthew L. Semersky , Joonsuk Kim , Jarkko Kneckt , Ashok Ranganath , Yong Liu , Su Khiong Yong
Abstract: A wireless local area network (WLAN) station (STA) reports, with a medium access control (MAC) frame, a buffer status of an urgent traffic identifier (TID) to a second STA. In some embodiments, the second STA is also an access point (AP). The delay in reporting is reduced by providing a buffer status report for the urgent TID in a data frame being transmitted to carry data for a current TID. The buffer status report, in some embodiments, provides the value of the urgent TID. In some embodiments, the buffer status report provides an indication of the amount of data in a buffer corresponding to the urgent TID. In some embodiments, the buffer status report is based on an aggregated measure of more than one buffer with data awaiting transmission. The transmission of the MAC frame, in some embodiments, is unsolicited.
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公开(公告)号：US10911190B2
公开(公告)日：2021-02-02
申请号：US16459544
申请日：2019-07-01
Applicant: Apple Inc.
Inventor： Guoqing Li , Yong Liu , Christiaan A. Hartman , Ashok Ranganath , Oren Shani , Su Khiong Yong , Jarkko L. Kneckt , Joonsuk Kim
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.
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公开(公告)号：US10778472B2
公开(公告)日：2020-09-15
申请号：US15371049
申请日：2016-12-06
Applicant: Apple Inc.
Inventor： Guoqing Li , Joonsuk Kim
IPC: H04W72/04 , H04L25/02 , H04B17/318 , H04B17/336 , H04W72/08 , H04W84/12 , H04W88/08 , H04W88/02 , H04L1/20 , H04L1/16
Abstract: Uplink resource assignment in a wireless local area network (WLAN) by an access point (AP) to wireless stations (STAs) is herein provided using opportunistic feedback from the STAs. The AP sends a message to a first STA; the message is also observed by a second STA. Each STA can determine if it wishes to opportunistically send information concerning the message to the AP. The second STA can perform power measurements on the message and send subcarrier signal to noise ratio (SNR) or ranking information to the AP. Thus, the AP can receive, possibly without expectation, encoded or compressed information describing radio channels of the first STA and/or the second STA. Based on the received channel information the AP improves operation of a dynamic resource allocation algorithm which determines uplink grants of resource units (RUs) to the STAs.
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公开(公告)号：US10594450B2
公开(公告)日：2020-03-17
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
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.
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公开(公告)号：US10575242B2
公开(公告)日：2020-02-25
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
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.
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