公开(公告)号：US20230370189A1

公开(公告)日：2023-11-16

申请号：US18195291

申请日：2023-05-09

Applicant: MediaTek Inc.

Inventor： Jianhan Liu ,  Shengquan Hu ,  Gary A. Anwyl ,  Thomas Edward Pare, JR.

IPC: H04K3/00 ,  H04L5/00

CPC classification number: H04K3/65 ,  H04L5/0007 ,  H04L5/0048

Abstract: Techniques pertaining to enhanced long range (ELR) communication schemes in wireless communications are described. An apparatus (e.g., a station (STA)) performs an ELR communication by either: (i) transmitting an ELR physical-layer protocol data unit (PPDU); or (ii) receiving the ELR PPDU. The ELR PPDU includes a spoofing preamble, an ELR preamble and an ELR data portion.

公开(公告)号：US20230354195A1

公开(公告)日：2023-11-02

申请号：US18220126

申请日：2023-07-10

Applicant: MEDIATEK INC.

Inventor： Jianhan Liu ,  Po-Yuen Cheng ,  Thomas Edward Pare, JR.

IPC: H04W52/02 ,  H04L27/04

CPC classification number: H04W52/0229 ,  H04L27/04 ,  H04W52/0235 ,  H04W84/12

Abstract: Systems and methods of transmitting and receiving a Wake-Up Radio (WUR) packet by using a simplified preamble structure that contains no training field. The preamble carries a signature sequence selected from a set of predefined sequences, each corresponding to a different data transmission rate. The preamble and the control information of the WUR packet are transmitted in the same rate as indicated by the selected sequence. Hence, a receiving WUR can determine the data transmission rate and locate the associated control information directly if a sequence that matches a predefined signature sequence is detected. The same sequence or in combination with an additional sequence in the preamble may also be used to indicate automatic gain control synchronization, packet type and other related information.

公开(公告)号：US10985862B2

公开(公告)日：2021-04-20

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.

IPC: H04L1/00 ,  H04W52/04 ,  H04L5/00 ,  H04W72/04

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.

公开(公告)号：US10979178B2

公开(公告)日：2021-04-13

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 ,  H04L5/00 ,  H04L27/26 ,  H04L1/00 ,  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.

公开(公告)号：US10820207B2

公开(公告)日：2020-10-27

申请号：US15590851

申请日：2017-05-09

Applicant: MEDIATEK INC.

Inventor： Jianhan Liu ,  Tianyu Wu ,  Rongsheng Huang ,  James June-Ming Wang

IPC: H04W40/00 ,  H04W16/02 ,  H04W16/14 ,  H04W28/02 ,  H04J3/16 ,  H04W74/00 ,  H04L1/00

Abstract: A backward compatible frame reuse mechanism that allows new information to be defined a reused frame without causing any incorrect operation in a legacy receive device. To generate a reused frame, a portion of the frame in the first format is masked with a predetermined masking sequence (PMS) and thereby redefined as new fields in a second format. When a device that supports the reuse scheme receives a frame that possible is a reused frame, the device checks the potentially reused portion according to the first format after de-masking and also checks according to the second format without de-masking. Based on the check results, the device selects a format to resolve the frame. A legacy device receiving the reused frame only checks the reused portion without de-masking, which results in a certain check error and makes the device discard the frame without any harmful operation.

公开(公告)号：US10594525B2

公开(公告)日：2020-03-17

申请号：US15928479

申请日：2018-03-22

Applicant: MEDIATEK INC.

Inventor： Jianhan Liu ,  Tianyu Wu

IPC: H04L27/26 ,  H04L25/02 ,  H04W84/12

Abstract: Systems and methods of expanding indication capabilities of existent PPDU preamble fields. An existing field “Doppler mode” in a preamble is redefined into a dual-use field for indicating channel variation for a short packet as well as for indicating presence of mid-amble(s) in a long packet. Particularly, for a long packet (longer than a predefined data transmission time or a longer than a predefined number of data symbols), the two possible values of the one-bit “Doppler mode” field indicate whether there is any mid-amble carrying training symbols in the payload. On the other hand, for a short packet, the two possible values in the same field indicate whether the channel for transmitting the instant packet is currently time-variant as determined by the transmitting device.

公开(公告)号：US10594462B2

公开(公告)日：2020-03-17

申请号：US15278031

申请日：2016-09-28

Applicant: MEDIATEK INC.

Inventor： Tianyu Wu ,  Jianhan Liu ,  Shengquan Hu ,  Thomas Edward Pare, Jr.

IPC: H04L5/00 ,  H04W72/04

Abstract: 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.

公开(公告)号：US10411753B2

公开(公告)日：2019-09-10

申请号：US15081968

申请日：2016-03-28

Applicant: MEDIATEK INC.

Inventor： Jianhan Liu ,  Chien-Fang Hsu

IPC: H04B1/707

Abstract: The present invention provides a method and an electronic apparatus for transmitting a packet with changeable spreading factor. The method comprises: utilizing a spreading circuit to select a spreading factor from a plurality of spreading factors according to a transmitting condition to adjust a spreading for the packet; and transmitting the packet. The electronic apparatus comprises: a spreading circuit and a transmitting circuit. The spreading circuit is utilized for selecting a spreading factor from a plurality of spreading factors according to a transmitting condition to adjust the spreading for the packet. The transmitting circuit is coupled to the spreading circuit, and utilized for transmitting the packet.

公开(公告)号：US10341850B2

公开(公告)日：2019-07-02

申请号：US15117448

申请日：2015-02-10

Applicant: MEDIATEK INC. ,  Jianhan Liu ,  Tianyu Wu ,  Thomas Edward Pare, Jr.

Inventor： Jianhan Liu ,  Tianyu Wu ,  Thomas Edward Pare, Jr.

IPC: H04W8/26 ,  H04W48/16 ,  H04W16/10 ,  H04L12/823 ,  H04W84/12

Abstract: A method for identifying source BSS in WLAN is proposed. A high efficiency (HE) access point (AP) sends a packet containing a basic service set (BSS) color to a HE station. The HE AP also sends a packet containing an assigned association identification (AID) to a very high throughput (VHT) station. The assigned AID comprises at least part of the BSS color information. The VHT station therefore sends a packet containing the at least part of the BSS color information such that any AP or station that receives the packet can determine the BSS the VHT station is in.

公开(公告)号：US10187124B2

公开(公告)日：2019-01-22

申请号：US15283168

申请日：2016-09-30

Applicant: MEDIATEK INC.

Inventor： Jianhan Liu ,  Shuling Feng ,  Thomas Edward Pare, Jr. ,  YungPing Hsu

IPC: H04B7/02 ,  H04L27/26 ,  H04L25/02 ,  H04B7/06 ,  H04W84/12

Abstract: A method of transmitting and receiving a HE PPDU and perform channel estimation enhancement is proposed. The HE PPDU comprises legacy preamble, HE-STF, HE-LTF, and data. A beam-change indication indicates if the pre-multiplied beamforming Q-matrix is changed from legacy preamble to H-SFT, HE-LTF, and data portion. A value of 1 indicates that Q matrix is changed. A value of 0 indicates that Q matrix is unchanged and receiver should be safe to combine L-LTF and HE-LTF. The beam-change indication can be used to significantly enhance channel estimation at receiver. When there is no beam-change, receiver does not change operation during HE-STF and HE-LTF such that the channel estimations can rely on the combination of L-LTFs, L-SIG, RL-SIG, HE-SIGAs and HE-LTF.