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公开(公告)号：US11159286B2
公开(公告)日：2021-10-26
申请号：US16406931
申请日：2019-05-08
发明人： Shengquan Hu , Tianyu Wu , Jianhan Liu , Thomas Edward Pare, Jr.
IPC分类号： H04L5/00 , H04W72/04 , H04B7/0452
摘要： System and method of OFDMA transmission in which mid-ambles are configured on a per-user basis for channel variation adaptation. The multiple channels used in an OFDMA transmission may use different mid-amble settings based on their respective channel characteristics. Particularly, some channels may have mid-ambles and some may have not, and mid-amble update intervals may vary across the channels. For a trigger-based (TB) uplink (UL) OFDMA transmission, an AP may signal the per-user mid-amble information in the user information fields of the trigger frame. For a downlink (DL) OFDMA transmission, an AP may signal the per-user mid-amble information in the HE SIG-B fields.
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公开(公告)号：US20190288767A1
公开(公告)日：2019-09-19
申请号：US16351236
申请日：2019-03-12
发明人： James June-Ming Wang , Thomas Edward PARE, Jr. , Yongho Seok , Gabor Bajko , Jianhan Liu , Tianyu Wu
IPC分类号： H04B7/14 , H04B7/0452 , H04L27/26 , H04W16/12 , H04W52/24
摘要： Systems and methods of WLAN communication including efficient spatial reuse mechanisms for relay transmissions between a repeater network and non-AP STAs in OFDMA. The non-AP STAs are grouped based on their connectivity with the individual repeaters and the radio coverage regions of the repeaters. Each group is either a non-overlapping group with the constituent non-AP STAs located in a non-overlapping coverage region of a particular repeater, or an overlapping group with the constituent non-AP STAs located in an overlapping coverage region of two or more repeaters. Based on the grouping, certain RUs (or subchannels) are reused for multiple groups without causing inter-group interference, thereby expanding the bandwidths used in the relay operations. RU allocation based on grouping can be used in combination with transmit power adjustment to achieve efficient spatial reuse in OFDMA.
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公开(公告)号：US10038543B2
公开(公告)日：2018-07-31
申请号：US14788752
申请日：2015-06-30
发明人： Chao-Chun Wang , Jianhan Liu , Tianyu Wu , Rongsheng Huang
IPC分类号： H04L5/00 , H04B7/0452 , H04W74/08
CPC分类号： H04L5/0073 , H04B7/0452 , H04L5/0023 , H04W74/0816
摘要： Methods and apparatus are provided for a many to one communication protocol. In one novel aspect, a modified CTS is sent by a receiving wireless communications station in response to a regular RTS. The modified CTS includes an indication for an uplink MU operation. In one embodiment, a modified CTS indicates a restricted access window (RAW) followed by RAW parameter set (RPS). In one embodiment, a subset of wireless communications devices associated with the receiving wireless communications station sends modified PS-poll with uplink data indication. Such PS-poll traffic is protected from passerby wireless communications devices from an OBSS. The receiving wireless communications station sends a modified resource-allocation map frame followed by a regular CTS frame. The subsets of wireless communications devices send their uplink data based on the received resource allocation map. The RTS-originating wireless station either sends its data frame earlier or concurrently with other wireless communications devices.
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4.发明申请CSI Feedback Modes and Indication for Sub Channel Feedback in OFDMA Systems 审中-公开OFDMA系统中子信道反馈的CSI反馈模式和指示公开(公告)号：US20150372795A1
公开(公告)日：2015-12-24
申请号：US14742632
申请日：2015-06-17
发明人： Tianyu Wu , Jianhan Liu , Thomas Edward Pare, JR.
IPC分类号： H04L5/00
CPC分类号： H04L5/0057 , H04B17/24 , H04L5/0007 , H04L5/0023 , H04L5/0048
摘要： A method of indicating feedback mode and providing corresponding sub-channel feedback in OFDMA systems is provided. A transmitting device transmits a sounding announcement frame and a sounding signal to a receiving device. The sounding signal is transmitted over multiple sub-channels of a wide channel. The transmitting device also provides a feedback mode indication. The receiving device estimates channel quality information based on the received sounding signal and the feedback mode indication. The receiving device then sends feedback information to the transmitting device. The feedback information contains the estimated channel quality information of a selected set of sub-channels based on the feedback mode indication.
摘要翻译： 提供了一种在OFDMA系统中指示反馈模式并提供相应的子信道反馈的方法。 发送装置将发声通知帧和探测信号发送到接收装置。 探测信号通过宽通道的多个子通道传输。 发送设备还提供反馈模式指示。 接收装置基于接收到的探测信号和反馈模式指示来估计信道质量信息。 然后，接收装置向发送装置发送反馈信息。 反馈信息基于反馈模式指示包含所选择的一组子信道的估计信道质量信息。
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公开(公告)号：US11411635B2
公开(公告)日：2022-08-09
申请号：US16351236
申请日：2019-03-12
发明人： James June-Ming Wang , Thomas Edward Pare, Jr. , Yongho Seok , Gabor Bajko , Jianhan Liu , Tianyu Wu
摘要： Systems and methods of WLAN communication including efficient spatial reuse mechanisms for relay transmissions between a repeater network and non-AP STAs in OFDMA. The non-AP STAs are grouped based on their connectivity with the individual repeaters and the radio coverage regions of the repeaters. Each group is either a non-overlapping group with the constituent non-AP STAs located in a non-overlapping coverage region of a particular repeater, or an overlapping group with the constituent non-AP STAs located in an overlapping coverage region of two or more repeaters. Based on the grouping, certain RUs (or subchannels) are reused for multiple groups without causing inter-group interference, thereby expanding the bandwidths used in the relay operations. RU allocation based on grouping can be used in combination with transmit power adjustment to achieve efficient spatial reuse in OFDMA.
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公开(公告)号：US20160006554A1
公开(公告)日：2016-01-07
申请号：US14788752
申请日：2015-06-30
发明人： Chao-Chun Wang , Jianhan Liu , Tianyu Wu , Rongsheng Huang
CPC分类号： H04L5/0073 , H04B7/0452 , H04L5/0023 , H04W74/0816
摘要： Methods and apparatus are provided for a many to one communication protocol. In one novel aspect, a modified CTS is sent by a receiving wireless communications station in response to a regular RTS. The modified CTS includes an indication for an uplink MU operation. In one embodiment, a modified CTS indicates a restricted access window (RAW) followed by RAW parameter set (RPS). In one embodiment, a subset of wireless communications devices associated with the receiving wireless communications station sends modified PS-poll with uplink data indication. Such PS-poll traffic is protected from passerby wireless communications devices from an OBSS. The receiving wireless communications station sends a modified resource-allocation map frame followed by a regular CTS frame. The subsets of wireless communications devices send their uplink data based on the received resource allocation map. The RTS-originating wireless station either sends its data frame earlier or concurrently with other wireless communications devices.
摘要翻译： 为多个通信协议提供了方法和装置。 在一个新颖的方面，响应于常规RTS，接收无线通信站发送修改的CTS。 经修改的CTS包括用于上行链路MU操作的指示。 在一个实施例中，修改的CTS指示受限访问窗口（RAW），其后跟RAW参数集（RPS）。 在一个实施例中，与接收无线通信站相关联的无线通信设备的子集通过上行链路数据指示发送修改的PS-poll。 通过无线通信设备从OBSS保护这种PS-poll流量。 接收无线通信站发送经修改的资源分配映射帧，后跟正常CTS帧。 无线通信设备的子集基于接收的资源分配图发送其上行链路数据。 RTS发起的无线站可以较早地或与其他无线通信设备同时发送其数据帧。
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