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公开(公告)号：US11019559B2
公开(公告)日：2021-05-25
申请号：US15372983
申请日：2016-12-08
Applicant: MEDIATEK INC.
Inventor： Tianyu Wu , Chao-Chun Wang , Chien-Fang Hsu , James June-Ming Wang , Jianhan Liu , Thomas Edward Pare, Jr.
Abstract: A method of very high throughput (VHT) operation information subfields design for IEEE 802.11 WLAN is proposed. The VHT operation information subfields comprise a channel width, a channel center frequency segment 0 (CCFS0), and a channel center frequency segment 1 (CCFS1). Multiple definitions of the VHT operation information subfields have been adopted by different access points (AP)s and wireless stations (STAs). In accordance with one novel aspect, upon receiving the VHT operation information element broadcasted by an AP, an STA will first check the channel width indicated by the AP. The STA then follows different definitions under different channel widths. Under such method, the STA can support up to 160 MHz operation mode with APs following different definitions and operating up to 160 MHz mode.
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公开(公告)号：US10211948B2
公开(公告)日：2019-02-19
申请号：US15290135
申请日：2016-10-11
Applicant: MEDIATEK INC.
Inventor： Jianhan Liu , Shengquan Hu , Tianyu Wu , Thomas Edward Pare, Jr.
Abstract: A new lower density parity check (LDPC) tone mapper is proposed when DCM is applied for a given resource unit (RU) when LDPC is used as the channel control coding. For HE PPDU transmission with DCM, LDPC encoded streams are first modulated by a DCM constellation mapper. The modulated symbols of the lower half of the frequency segment and the modulated symbols of the upper half of the frequency segment are modulated using the same LDPC encoded bits using DCM mapping. The modulated symbols of the lower half of the frequency segment are mapped to lower half of the data subcarriers using DCM LDPC tone mapper. The modulated symbols of the upper half of the frequency segment are mapped to upper half of the data subcarriers using the same DCM LDPC tone mapper. Maximum frequency diversity for DCM can be achieved.
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公开(公告)号：US10128921B2
公开(公告)日：2018-11-13
申请号：US15499730
申请日：2017-04-27
Applicant: MEDIATEK INC.
Inventor： James June-Ming Wang , Jianhan Liu
IPC: H04B7/0452 , H04B7/06
Abstract: System and method of Multi-User Multiple-Input Multiple-Output (MU-MIMO) Beamforming communication. An MU-MIMO BF training session is used to train all the responders in a user group in relation to an initiator having multiple antenna arrays. Accordingly, suitable TX-RX sector pairs are selected based on the training results, and the user group is arranged into subsets such that the initiator can transmit data to the responders in one subset simultaneously by using mutually orthogonal BF waveforms. Prior to the MU-MIMO BF training session, the initiator can select TX sectors of the TX antennas and responders for the training session based on results from a prior or preliminary SISO BF training.
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公开(公告)号：US20180062787A1
公开(公告)日：2018-03-01
申请号：US15684921
申请日：2017-08-23
Applicant: MEDIATEK INC.
Inventor： Hung-Tao Hsieh , Tung Sheng Yang , Hsuan-Yu Liu , Kun-Chien Hung , YungPing Hsu , Jianhan Liu , Shengquan Hu , Chih-Shi Yee , Thomas Edward Pare, JR.
CPC classification number: H04L1/0003 , H04L1/0002 , H04L1/0009 , H04L1/0023 , H04L1/004 , H04L5/0042 , H04L5/0044 , H04L5/006 , H04W52/04 , H04W72/04 , H04W72/0453
Abstract: A wireless communicating method includes: performing one resource unit allocation upon a channel; and allocating a first resource unit and a second resource unit in said one resource unit allocation to a station, wherein the first resource unit is different from the second resource unit. By using the wireless communication method, throughput rate can be improved.
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65.发明申请公开(公告)号：US20170347234A1
公开(公告)日：2017-11-30
申请号：US15470000
申请日：2017-03-27
Applicant: MediaTek Inc.
Inventor： Chuen-Shen Bernard Shung , Jianhan Liu , George Chien , YungPing Hsu , Yasantha Rajakarunanayake , Dingchung Jann , Tom Hsiou-Cheng Kao
CPC classification number: H04W4/023 , G08B3/1008 , G08B21/0272 , G08B25/016 , H04L5/0055 , H04W4/90 , H04W52/0229 , H04W52/0264 , H04W52/0274 , H04W56/002 , H04W72/0453 , H04W84/12 , Y02D70/14 , Y02D70/142 , Y02D70/164 , Y02D70/20 , Y02D70/26
Abstract: An emergency mode is provided in a portable electronic device for locating a survivor in a disaster. The device includes a wireless antenna to transmit and receive wireless signals; a memory to store one or more identifiers; a user interface to receive a command that enables the emergency mode. The device also includes one or more processors, which, in response to the command, detect via the wireless receiver a predetermined identifier that matches a stored identifier identifying a sender of the predetermined identifier as a trusted node. When the predetermined identifier and a timing measurement frame are received from the trusted node, the device sends a response to the trusted node to indicate its presence.
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Patent Agency Ranking
公开(公告)号：US09749967B2
公开(公告)日：2017-08-29
申请号：US15257074
申请日：2016-09-06
Applicant: MEDIATEK INC.
Inventor： James June-Ming Wang , Jianhan Liu , Chao-Chun Wang , YungPing Hsu
CPC classification number: H04W52/243 , H04B17/345 , H04W16/02 , H04W52/146 , H04W52/241 , H04W52/242 , H04W52/245 , H04W52/247 , H04W52/50 , H04W74/0816 , H04W84/12
Abstract: A method of spatial reuse with opportunistic transmit power control (TPC) and clear channel assessment (CCA) is proposed. In the opportunistic TPC and CCA, a spatial reuse station (SR-STA) gains enough knowledge in certain situation for more aggressive spatial reuse such that its transmit power may be adjusted to meet the spatial reuse conditions based on the received OBSS PPDU and the corresponding spatial reuse parameter (SRP). Both Type 1 SRP and Type 2 SRP are defined. In one example, the Type 1 or Type 2 SRP is a 5-bit parameter carried in the HE-SIG-A field of the OBSS PPDU, which can be a trigger frame, a response frame, a request-to-send (RTS)/clear-to-send (CTS) frame, and a data frame.
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公开(公告)号：US20170063512A1
公开(公告)日：2017-03-02
申请号：US15123247
申请日：2015-03-04
Applicant: Tianyu Wu , Jianhan Liu , KIRAN ULN , Thomas Edward Pare, JR. , MEDIATEK INC.
Inventor： Tianyu Wu , Jianhan Liu , KIRAN ULN , Thomas Edward Pare, JR.
CPC classification number: H04L5/0057 , H04B7/0417 , H04B7/0452 , H04B7/0623 , H04B7/0626 , H04B7/0632 , H04B17/24 , H04B17/336 , H04L1/1671 , H04L1/1685 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04W72/0446 , H04W72/082
Abstract: A method of sub-channel feedback in OFDMA systems is provided. A wireless receiving device (STA) receives a radio signal from a transmitting device (AP) over a wide channel in an OFDMA system. The radio signal is transmitted over multiple sub-channels of the wide channel. The STA estimates channel quality information based on the received radio signal for each sub-channel. The STA then sends feedback information to the transmitting device. The feedback information comprises the estimated channel quality information for a selected subset of sub-channels from the wide channel based on a predefined rule. In one embodiment, the feedback information is embedded within an ACK/BA frame or is carried in a frame immediately subsequent to the ACK/BA frame.
Abstract translation: 提供OFDMA系统中子信道反馈的方法。 无线接收设备（STA）通过OFDMA系统中的宽信道从发射设备（AP）接收无线电信号。 无线电信号通过宽信道的多个子信道发送。 STA基于每个子信道的接收到的无线电信号来估计信道质量信息。 然后，STA向发送设备发送反馈信息。 基于预定义规则，反馈信息包括来自宽信道的子信道的选定子集的估计信道质量信息。 在一个实施例中，反馈信息被嵌入到ACK / BA帧内，或者紧接在ACK / BA帧之后的帧中被携带。
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公开(公告)号：US20160066257A1
公开(公告)日：2016-03-03
申请号：US14838366
申请日：2015-08-28
Applicant: MEDIATEK INC.
Inventor： Jianhan Liu , Tianyu Wu , Rongsheng Huang , James June-Ming Wang
CPC classification number: H04L5/006 , H04L1/0003 , H04W28/06 , H04W28/18 , H04W48/16 , H04W74/00 , H04W74/0808 , H04W84/12 , Y02D70/00 , Y02D70/142
Abstract: A spatial reuse prioritized channel access scheme is proposed to enhance the average throughput per station in a wireless network by optimizing spatial reuse. Spatial reuse capability (SRC) is defined as a monotonically decreasing function of co-channel interference signal strength from OBSSs. Higher spatial reuse capability can be transformed into higher data rate or less usage of airtime by using higher MCS or less interferences to OBSSs by reducing TX power. By allowing the stations that have larger spatial reuse capability to have higher probability to win channel access contention, the overall network throughput is enhanced.
Abstract translation: 提出了空间重用优先级信道接入方案，通过优化空间重用来提高无线网络中每个站的平均吞吐量。 空间复用能力（SRC）被定义为来自OBSS的同信道干扰信号强度的单调递减函数。 通过降低TX功率，可以通过使用更高的MCS或更少的OBSS干扰来将更高的空间重用能力转换为更高的数据速率或更少的通话时间的使用。 通过允许具有较大空间重用能力的站点具有较高的赢得频道接入争用的概率，增强了整体网络吞吐量。
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69.发明公开公开(公告)号：US20240171438A1
公开(公告)日：2024-05-23
申请号：US18515311
申请日：2023-11-21
Applicant: MediaTek Inc.
Inventor： Shengquan Hu , Ching-Wen Hsiao , Jianhan Liu , Thomas Edward Pare, JR.
CPC classification number: H04L27/2613 , H04L5/0007 , H04L5/0048
Abstract: Various schemes pertaining to long training field (LTF) and short training field (STF) transmission for wide bandwidth 240 MHz with more direct-current (DC) tones in wireless communications are described. A processor of an apparatus generates either or both of an LTF and a STF of a physical-layer protocol data unit (PPDU) with a center 996-tone resource unit (RU) having more than a predetermined number of DC tones. The processor then performs a wireless communication in a wide bandwidth (e.g., 240 MHz) with the PPDU.
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公开(公告)号：US20240048421A1
公开(公告)日：2024-02-08
申请号：US18226831
申请日：2023-07-27
Applicant: MediaTek Inc.
Inventor： Shengquan Hu , Jianhan Liu , Tung Sheng Yang , Thomas Edward Pare, JR.
IPC: H04L27/26
CPC classification number: H04L27/262
Abstract: Various schemes pertaining to peak-to-average power ratio (PAPR) reduction for resource unit (RU) duplication and tone repetition in wireless communications are described. An apparatus generates a resource unit (RU) or multi-RU (MRU). The apparatus then performs a wireless communication using the RU or MRU with either or both of a RU duplication and a tone repetition such that a peak-to-average power ratio (PAPR) is reduced.
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