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    Structured Resource Allocation Signaling
    1.
    发明申请
    Structured Resource Allocation Signaling 审中-公开

    公开(公告)号：US20170093546A1

    公开(公告)日：2017-03-30

    申请号：US15278031

    申请日：2016-09-28

    申请人： MEDIATEK INC.

    发明人： Tianyu Wu ,  Jianhan Liu ,  Shengquan Hu ,  Thomas Edward PARE, JR.

    IPC分类号： H04L5/00

    摘要： Methods and apparatus are provided for structured resource allocation signaling. In one novel aspect, an 8-bit RU allocation filed is allocated in the HE-SIG-B common field for each 20 MHz. The structured resource signaling supports more than four MU-MIMO users. In one embodiment, the STA decodes the 8-bit RU allocation signal following a structured resource unit (RU) allocation rule, and determines the RU. In one embodiment, the STA decodes the first two bits of the 8-bit RU allocation signal to determine a first category of the RU allocation. The categories of the RU allocation includes a large RU size category indicating larger than or equal to 20 MHz RUs exist, a two 106-tone category indicating two 106-tone RUs exist, and a no-large-RU category indicating only smaller-than-242-tone RUs exist. The STA further decodes based on the category. A lookup table (LUT) for RU allocation is built and decoded based on a structured signaling rule.

    LDPC Tone Mapping Schemes for Dual-Sub-Carrier Modulation in WLAN
    5.
    发明申请
    LDPC Tone Mapping Schemes for Dual-Sub-Carrier Modulation in WLAN 审中-公开

    公开(公告)号：US20170104553A1

    公开(公告)日：2017-04-13

    申请号：US15290135

    申请日：2016-10-11

    申请人： MEDIATEK INC.

    发明人： Jianhan Liu ,  Shengquan Hu ,  Tianyu Wu ,  Thomas Edward PARE, JR.

    IPC分类号： H04L1/00 ,  H04L27/00

    CPC分类号： H04L1/0041 ,  H04L27/0008 ,  H04L27/2601 ,  H04L27/2613 ,  H04L27/2626 ,  H04W72/0453 ,  H04W84/12

    摘要： 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.

    Reliable Dual Sub-Carrier Modulation Schemes in High Efficiency WLAN
    6.
    发明申请
    Reliable Dual Sub-Carrier Modulation Schemes in High Efficiency WLAN 审中-公开
    高效WLAN中可靠的双子载波调制方案

    公开(公告)号：US20160352552A1

    公开(公告)日：2016-12-01

    申请号：US15164690

    申请日：2016-05-25

    申请人： MEDIATEK INC.

    发明人： Jianhan Liu ,  Tianyu Wu ,  Thomas Edward PARE, JR. ,  YungPing Hsu

    IPC分类号： H04L27/26 ,  H04L5/00 ,  H04B1/7176

    摘要： Modulation schemes that use dual sub-carrier to reliably transmit physical layer related signaling information and/or data in high efficiency wireless local area network (HE WLAN) are proposed. The proposed schemes can be implemented with low complexity and provide better performance than existing modulation schemes used in WLAN that are based on IEEE 802.11/a/b/g/n/ac standards. The proposed schemes enhance the reliability of transmissions, especially under narrow band interferences. In accordance with a novel aspect, dual subcarrier modulation (DCM) is introduced in HE WLAN. DCM can introduce frequency diversity into OFDM systems by transmitting the same information on two subcarriers separated in frequency. A DCM indication scheme is used such that both encoding and decoding of DCM is really simple.

    摘要翻译： 提出了使用双子载波在高效率无线局域网（HE WLAN）中可靠传输物理层相关信令信息和/或数据的调制方案。 所提出的方案可以以低复杂度实现，并且比基于IEEE 802.11 / a / b / g / n / ac标准的WLAN中使用的现有调制方案提供更好的性能。 所提出的方案增强了传输的可靠性，特别是在窄带干扰下。 根据一个新颖的方面，在HE WLAN中引入了双副载波调制（DCM）。 DCM可以通过在频率上分离的两个子载波上发送相同的信息来将频率分集引入OFDM系统。 使用DCM指示方案，使得DCM的编码和解码都非常简单。

    Burst OFDMA Supporting MU-MIMO
    7.
    发明申请
    Burst OFDMA Supporting MU-MIMO 有权
    支持MU-MIMO的突发OFDMA

    公开(公告)号：US20160014763A1

    公开(公告)日：2016-01-14

    申请号：US14833072

    申请日：2015-08-22

    申请人： MEDIATEK INC.

    发明人： Yuh-Ren Jauh ,  Jianhan Liu ,  Chao-Chun Wang ,  James June-Ming Wang ,  Thomas Edward PARE, JR.

    IPC分类号： H04W72/04 ,  H04L5/00 ,  H04B7/04

    CPC分类号： H04L5/0007 ,  H04B7/0452 ,  H04L5/0055

    摘要： Methods and apparatus are provided for burst OFDMA support MU-MIMO in the WLAN network. In one novel aspect, pluralities of user channels are configured for a downlink wideband channel, wherein each user channel is associated with a user group selecting from a SU-SISO, or a SU-MIMO or a MU-MIMO. In one embodiment, the SIG1 and SIG2 signaling fields are independent for each user channel. In another embodiment, the SIG1 fields are duplicates for all user channels carrying common information. The SIG2 fields for each user group are different from each other carrying user group specific information. In another novel aspect, an uplink OFDMA frames contains ACK packets from multiple STAs concurrently using an uplink wideband channel. In one embodiment, one ACK packet is sent for a MU-MIMO user group. In another embodiment, the uplink ACK packet assignment is based on indications in the downlink PHY SIG field.

    摘要翻译： 为WLAN网络中的突发OFDMA支持MU-MIMO提供了方法和装置。 在一个新颖的方面，为下行链路宽带信道配置多个用户信道，其中每个用户信道与从SU-SISO或SU-MIMO或MU-MIMO选择的用户组相关联。 在一个实施例中，SIG1和SIG2信令字段对于每个用户信道是独立的。 在另一个实施例中，SIG1字段是携带公共信息的所有用户信道的重复。 每个用户组的SIG2字段彼此不同，承载用户组的具体信息。 在另一个新颖的方面，上行链路OFDMA帧包含使用上行链路宽带信道同时来自多个STA的ACK分组。 在一个实施例中，为MU-MIMO用户组发送一个ACK分组。 在另一个实施例中，上行链路ACK分组分配基于下行链路PHY SIG字段中的指示。

    MECHANISM FOR SHORT GUARD INTERVAL INDICATION IN HIGH EFFICIENCY WLAN
    8.
    发明申请
    MECHANISM FOR SHORT GUARD INTERVAL INDICATION IN HIGH EFFICIENCY WLAN 审中-公开

    公开(公告)号：US20180131469A1

    公开(公告)日：2018-05-10

    申请号：US15794981

    申请日：2017-10-26

    申请人： MEDIATEK INC.

    发明人： Jianhan LIU ,  Tianyu WU ,  Shengquan HU ,  Thomas Edward PARE, JR.

    IPC分类号： H04L1/06 ,  H04L1/00

    CPC分类号： H04L1/0643 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0091 ,  H04L27/2613 ,  H04W84/12

    摘要： Systems and methods of expanding indication capabilities of existent PPDU preamble fields. The “GI+LTF Size” field is redefined to indicate a new combination of GI duration and HE-LTF size. The redefinition is indicated when the values of the two other existent fields, in combination, indicate an invalid scenario because the two values should have been mutually exclusive. Particularly, the DCM field and the STBC field are both set to the “enabled” mode as an indication for redefine the “GI+LTF Size” field. Upon receiving such a PPDU, a receiver is configured to resolve the PPDU as neither DCM nor STBC is enabled. Rather, the receiver interprets the particular combination of DCM and STBC values as an indication that the “GI+LTF Size” field is redefined to indicate the new combination of GI duration and HE-LTF size.