公开(公告)号：US20180092123A1

公开(公告)日：2018-03-29

申请号：US15819048

申请日：2017-11-21

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Le LIU ,  Zhou LAN

IPC: H04W74/00 ,  H04W72/04 ,  H04W74/04 ,  H04L5/00

Abstract: The present invention discloses a data transmission method, apparatus, and system, and an access point. The method includes: transceiving data of a data portion in an uplink OFDMA PPDU scheduled by an access point AP on a corresponding allocated frequency resource unit RU, determining one or more fundamental channel units on which the allocated frequency resource unit RU is located, and transceiving at least some fields in a common signaling portion in the uplink OFDMA PPDU on the determined one or more fundamental channels. In this way, one or more fundamental channels for transceiving at least some fields in a common signaling portion in an uplink OFDMA PPDU are determinate, and another user can transceive data on another idle fundamental channel, thereby improving channel utilization. In addition, multiple users can simultaneously transceive data on multiple fundamental channels, thereby improving a service transmission rate.

公开(公告)号：US20170141888A1

公开(公告)日：2017-05-18

申请号：US15418462

申请日：2017-01-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Le LIU ,  Zhou LAN ,  Yi LUO

IPC: H04L5/00 ,  H04B1/707 ,  H04L27/26 ,  H04L25/02

CPC classification number: H04L5/0023 ,  H04B1/707 ,  H04L25/0204 ,  H04L27/2634 ,  H04W84/12

Abstract: A transmission device includes: an acquiring unit acquires LTF parameters, and acquires a start position I of allocated subcarriers, where the LTF parameters include a frequency domain transform parameter and a time domain transform parameter that are required for generating an LTF sequence; a frequency domain transform unit performs, according to the frequency domain transform parameter and the start position I, a frequency domain transform on an LTF basic sequence to obtain an LTF symbol; a time domain transform unit performs, according to the time domain transform parameter, a time domain transform on the LTF symbol to obtain the LTF sequence; and a sending unit adds the LTF sequence to a first data frame, and sends the first data frame to a second device, so that the second device determines the LTF basic sequence according to the LTF sequence and performs channel estimation according to the LTF basic sequence.