公开(公告)号：US20180184379A1

公开(公告)日：2018-06-28

申请号：US15852548

申请日：2017-12-22

Applicant: MEDIATEK INC.

Inventor： Jianhan LIU ,  Thomas Edward PARE, JR. ,  Keng Leong FONG

IPC: H04W52/02 ,  H04W74/00 ,  H04L27/10

CPC classification number: H04W52/0235 ,  H04L27/10 ,  H04W52/0219 ,  H04W74/006 ,  H04W84/12 ,  Y02D70/00 ,  Y02D70/10 ,  Y02D70/1262 ,  Y02D70/14 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/26

Abstract: Systems and methods of transmitting a multi-user (MU) wake-up packet in WLAN including wake-up signals to activate main radios on multiple communication devices via the wake-up radios (WURs). In the multi-user wake-up packet, a frequency channel can be divided into several sub-channels for transmitting multiple wake-up signals in FDMA. Each wake-up signal is modulated in ON/OFF Key modulation. Two adjacent wake-up signals are adequately spaced apart by a certain frequency spacing to reduce adjacent channel interferences. Once a WUR on a receive device receives the packet, it generates a wake-up indication to wake up the main radio for active data communication. The MU wake-up packet may also include a sequence of multiple wake-up signals transmitted using the same sub-channel and cascaded in a time-domain. A reconfiguration window may be inserted between consecutive wake-up signals on the same sub-channel, and between a legacy preamble and the following wakeup signals.

公开(公告)号：US20230354277A1

公开(公告)日：2023-11-02

申请号：US18347288

申请日：2023-07-05

Applicant: MEDIATEK INC.

Inventor： Hung-Tao HSIEH ,  Tung-Sheng YANG ,  Chao-Chun WANG ,  Jianhan LIU ,  Ying-You LIN

IPC: H04W72/0446 ,  H04W72/044 ,  H04L1/00

CPC classification number: H04W72/0446 ,  H04W72/046 ,  H04L1/0003

Abstract: A station (STA) for communicating with an Access Point (AP) in a wireless communication system is provided. The STA may include a wireless transceiver and a processor. The wireless transceiver may be configured to perform wireless transmission and reception to and from the AP. The processor may be configured to receive allocation information from the AP via the wireless transceiver, wherein the allocation information indicates at least one user block and at least one stream for the STA, wherein each resource unit (RU) in a Physical layer Protocol Data Unit (PPDU) comprises at least one user block, and send Uplink (UL) data or receive Downlink (DL) data in the at least one user block to or from the AP via the wireless transceiver according to the allocation information.

公开(公告)号：US20180131469A1

公开(公告)日：2018-05-10

申请号：US15794981

申请日：2017-10-26

Applicant: MEDIATEK INC.

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

IPC: H04L1/06 ,  H04L1/00

CPC classification number: H04L1/0643 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0091 ,  H04L27/2613 ,  H04W84/12

Abstract: 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.