公开(公告)号：EP3468127A1

公开(公告)日：2019-04-10

申请号：EP18207216.5

申请日：2012-12-07

申请人： Huawei Technologies Co., Ltd.

发明人： SUH, Jung Hoon ,  LI, Yunbo ,  AU, Kwok Shum ,  ABOUL-MAGD, Osama ,  SUN, Sheng

IPC分类号： H04L27/26 ,  H04L5/00 ,  H04B7/06 ,  H04W84/12

摘要： A method for transmitting a frame includes generating an omni portion of the frame, the omni portion including a non-beamformed long training field and a signal field, the non-beamformed long training field including channel estimation information used to decode the signal field, the non-beamformed long training field configured to be transmitted through one of multiple antennas and multiple streams. The method also includes generating a multi-stream portion of the frame, the multi-stream portion including a data field and a multi-stream long training field, the multi-stream long training field including station-specific decoding information for station-specific data in the data field. The method further includes applying a beamforming indicator to the signal field of the omni portion, and transmitting the frame.

公开(公告)号：EP3248410A1

公开(公告)日：2017-11-29

申请号：EP16748714.9

申请日：2016-02-04

申请人： Huawei Technologies Co., Ltd.

发明人： ABOUL-MAGD, Osama ,  SUH, Jung Hoon

IPC分类号： H04W28/16

摘要： A method for communicating data carried in a frequency-division multiple access (OFDMA) data frame in a transmission opportunity (TXOP) of a wireless local area network (LAN) access point (AP) is provided. The OFDMA data frame may be a downlink or uplink multi-user (MU) OFDMA data frame carrying data associated with a plurality of stations in respective frequency sub-bands. Cascaded downlink and uplink MU OFDMA data frames may be communicated in the same TXOP. A downlink frame may be communicated in a TXOP to carry frequency resource allocation information for an uplink OFDMA data frame communicated in the TXOP. An acknowledgement (ACK) frame may be communicated in a TXOP to acknowledge whether a downlink or uplink MU OFDMA data frame in the TXOP was successfully received.

公开(公告)号：EP3172937A1

公开(公告)日：2017-05-31

申请号：EP15833894.7

申请日：2015-08-14

申请人： Huawei Technologies Co., Ltd.

发明人： SUH, Jung Hoon ,  ZHANG, Jiayin ,  ABOUL-MAGD, Osama

IPC分类号： H04W84/12

CPC分类号： H04B1/12 ,  H04L5/0048 ,  H04L27/2602 ,  H04L27/2613

摘要： An OFDMA subframe carrying different data fields in different time segments may include a separate short training field (STF), and a separate set of long training fields (LTFs), for each of the data fields to accommodate time-reuse scheduling. Communicating a separate STF for each data field may allow receivers to re-adjust automatic gain control (AGC) when the data fields carry different numbers of space-time-streams. Likewise, communicating separate sets of LTFs for each data field may allow different beamforming parameters to be applied to different data fields.

摘要翻译： 在不同时间段中携带不同数据字段的OFDMA子帧可以包括单独的短训练字段（STF）和单独的长训练字段集（LTF），用于每个数据字段以适应时间重用调度。 当数据字段承载不同数量的空时流时，为每个数据字段分开的STF通信可以允许接收机重新调整自动增益控制（AGC）。同样，为每个数据字段通信单独的LTF组可以允许不同的波束成形参数 应用于不同的数据字段。

公开(公告)号：EP3162142A1

公开(公告)日：2017-05-03

申请号：EP15825173.6

申请日：2015-07-17

申请人： Huawei Technologies Co., Ltd.

发明人： ABOUL-MAGD, Osama ,  AU, Kwok Shum ,  SUH, Jung Hoon

IPC分类号： H04W72/04

CPC分类号： H04W16/28 ,  H04B7/024 ,  H04W8/26 ,  H04W72/046 ,  H04W74/006 ,  H04W84/12 ,  H04W88/08 ,  H04W92/20

摘要： Embodiments are provided for enabling a beamforming mechanism in WLAN OBSSs. In an embodiment, a first AP of the OBSSs decides to participate in coordinated beamforming for the OBSSs. The OBSSs comprise a plurality of APs and a plurality of STAs associated with the APs. The AP thus transmits, periodically, a coordinated beamforming (CB) announcement message indicating an ID of the first AP and an ID of each STA associated with the first AP. When a second AP of the OBSSs receives the message from the first AP, the second AP maintains the ID of the first AP and the ID of each STA associated with the first AP in an entry of a CB table. When the second AP stops receiving the message, the second AP removes, from the CB table, the entry of the IDs of the first AP and its associated STAs.

摘要翻译： 被提供用于使波束形成无线OBSSs机构的实施例。 实施例在中，OBSSs的第一AP决定参加用于OBSSs协调波束成形。 所述OBSSs包括AP的多元化和与AP相关联的STA的复数。 所述AP发送THUS，周期性地，协作波束成形（CB）通知消息指示所述第一AP的ID，并与第一AP相关联的每一个STA的ID。 当OBSSs的第二AP接收来自第一AP的消息，第二AP保持第一AP的ID和与所述第一AP在CB表的条目相关联的每一个STA的ID。 当第二AP停止接收该消息时，第二AP移除，从CB表中，第一AP的ID和其相关联的STA的条目。