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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.
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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
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.
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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.
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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。
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公开(公告)号：US20200267630A1
公开(公告)日：2020-08-20
申请号：US16798835
申请日：2020-02-24
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 , H04W4/80 , H04W8/00 , H04B17/318
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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Patent Agency Ranking
公开(公告)号：US20170331605A1
公开(公告)日：2017-11-16
申请号：US15590960
申请日：2017-05-09
Applicant: Apple Inc.
Inventor： Oren SHANI , Guoqing LI , Joonsuk KIM , Ashok RANGANATH
Abstract: An access point (AP) in a wireless local area network (WLAN) uses a protocol to determine frequency/time resource allocations of resource units (RUs) in parallel with data transfer to and from WLAN stations (STAs). The AP generates a sounding table associating STAs with RUs for uplink (UL) and downlink (DL). The AP processes the sounding table to create a channel map table and then the AP allocates particular RUs to particular STAs. The STAs then receive and transmit data from and to the AP over the allocated RUs. This approach achieves good throughput while reducing the use of signaling and pilot overhead associated with channel sounding. To avoid interruption of ongoing transmissions, a newly arriving STA is grouped and sounded with other STAs. The protocol includes a joint sounding and data epoch followed by a determination of the channel map table.
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公开(公告)号：US20170311166A1
公开(公告)日：2017-10-26
申请号：US15498358
申请日：2017-04-26
Applicant: Apple Inc.
Inventor： Guoqing LI , Christiaan A. HARTMAN , Jarkko KNECKT , Yong LIU , Su Khiong YONG , Joonsuk KIM , Oren SHANI
CPC classification number: H04W16/02 , H04L49/201 , H04W52/367 , H04W74/006 , H04W84/12 , H04W88/08
Abstract: An interface circuit in an electronic device may receive, from an access point associated with the electronic device, a frame with management information that enables the electronic device to use a spatial-reuse technique, where the electronic device, through the spatial-reuse technique, adjusts a transmit power and a channel-availability sensing threshold. Moreover, the management information may specify parameters for the spatial-reuse technique. Then, the electronic device may transmit, using the spatial-reuse technique, one or more frames to the access point based on the parameters. Furthermore, the electronic device may transmit, to the access point, feedback information that indicates communication performance during the communication between the electronic device and the access point. For example, the feedback information may include a retry rate and, more generally, communication-performance information. This feedback information may be used by the access point to modify the parameters.
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公开(公告)号：US20170163446A1
公开(公告)日：2017-06-08
申请号：US15371049
申请日：2016-12-06
Applicant: Apple Inc.
Inventor： Guoqing LI , Joonsuk KIM
IPC: H04L25/02 , H04B17/336 , H04W72/08 , H04B17/318
CPC classification number: H04L25/0202 , H04B17/318 , H04B17/336 , H04L1/1685 , H04L1/20 , H04L25/0224 , H04W72/085 , H04W84/12 , H04W88/02 , H04W88/08
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：US20160330718A1
公开(公告)日：2016-11-10
申请号：US15146087
申请日：2016-05-04
Applicant: Apple Inc.
Inventor： Joonsuk KIM , Guoqing LI , Syed Aon Mujtaba
Abstract: Disclosed herein are system, method, and computer program product embodiments for providing an efficient way to assign resource blocks to user receiver devices in a wireless communications protocol. For example, the method can receive a frame for a wireless communications protocol. The method can also extract a unique value from a tone mapping field in a preamble of the frame. The method can also look up a resource block allocation for a portion of the tone space in a lookup table using the unique value. Further, the method can extract an assignment field from the preamble based on the determined resource block allocation. The method can also determine an assigned resource block number based on the assignment field. The method can also assign a resource block corresponding to the assigned resource block number to a user receiver device.
Abstract translation: 这里公开的是用于提供在无线通信协议中向用户接收机设备分配资源块的有效方式的系统，方法和计算机程序产品实施例。 例如，该方法可以接收无线通信协议的帧。 该方法还可以从帧的前导码中的色调映射字段中提取唯一值。 该方法还可以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。 此外，该方法可以基于所确定的资源块分配从前导码提取分配字段。 该方法还可以基于分配字段确定分配的资源块号。 该方法还可以将与分配的资源块号相对应的资源块分配给用户接收机设备。
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公开(公告)号：US20190124593A1
公开(公告)日：2019-04-25
申请号：US16135378
申请日：2018-09-19
Applicant: Apple Inc.
Inventor： Chiu Ngok E. WONG , Syed A. MUJTABA , Christiaan A. HARTMAN , Joonsuk KIM
Abstract: A station (STA) of a wireless local area network (WLAN) transitions implicitly between power management (PM) modes or PM states, without providing an explicit indication of the PM mode/state change to an access point (AP) of the WLAN. Transitions include changes between an active mode and a power save (PS) mode, or between an awake state and a doze state of the PS mode. Transitions occur immediately after receipt of a beacon indicating pending data for the STA, after an offset time indicated in the beacon, or at a specific wake time negotiated with the AP. After data reception is complete, the STA transitions implicitly to the PS mode or a doze state of the PS mode, after a power save inactivity timeout period or after receiving an indication that data transmission is complete.
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