US 12,244,447 B2
Data transmission method and apparatus in wireless local area network
Wei Lin, Shenzhen (CN); Xin Xue, Shenzhen (CN); Ningjuan Wang, Shenzhen (CN); and Le Liu, Shenzhen (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed on Apr. 28, 2023, as Appl. No. 18/309,575.
Application 18/309,575 is a continuation of application No. 17/246,182, filed on Apr. 30, 2021, granted, now 11,677,606.
Application 17/246,182 is a continuation of application No. 16/870,570, filed on May 8, 2020, granted, now 10,999,119, issued on May 4, 2021.
Application 16/870,570 is a continuation of application No. 15/987,216, filed on May 23, 2018, granted, now 10,686,640, issued on Jun. 16, 2020.
Application 15/987,216 is a continuation of application No. PCT/CN2016/106941, filed on Nov. 23, 2016.
Claims priority of application No. 201510823977.8 (CN), filed on Nov. 23, 2015; and application No. 201510854631.4 (CN), filed on Nov. 30, 2015.
Prior Publication US 2023/0336396 A1, Oct. 19, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 72/12 (2023.01); H04L 25/02 (2006.01); H04L 27/26 (2006.01); H04W 24/10 (2009.01); H04W 72/1268 (2023.01); H04W 72/23 (2023.01); H04W 84/12 (2009.01); H04B 7/0452 (2017.01)
CPC H04L 27/2672 (2013.01) [H04L 25/022 (2013.01); H04L 25/0226 (2013.01); H04L 27/261 (2013.01); H04L 27/2614 (2013.01); H04W 24/10 (2013.01); H04W 72/1268 (2013.01); H04W 72/23 (2023.01); H04W 84/12 (2013.01); H04B 7/0452 (2013.01); H04L 27/2601 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A method for channel estimation information transmission, the method comprising:
determining, by an apparatus, a long training field (LTF) sequence in a frequency domain according to a transmission bandwidth (BW) and a mode of a LTF field; and
sending, by the apparatus, a time-domain signal according to the LTF sequence in the frequency domain and a number of orthogonal frequency division multiplexing (OFDM) symbols of the LTF field;
wherein the LTF sequence in the frequency domain in a 1× LTF mode over a bandwidth that includes multiple 80 MHz channels that comprises any combination of the following: a left part of a long training field sequence of a 80 MHz channel (L-LTF80MHz_A), a right part of the long training field sequence of the 80 MHz channel (R-LTF80MHz_A), −L-LTF80MHz_A, or −R-LTF800MHZ_A;
wherein the L-LTF800MHz_A comprises {−1, −1, +1, +1, +1, +1, +1, −1, −1, −1, +1, +1, −1, −1, +1, −1, +1, −1, −1, −1, −1, −1, −1, +1, +1, −1, −1, +1, −1, +1, −1, −1, −1, −1, −1, +1, +1, −1, −1, +1, −1, +1, −1, +1, +1, +1, +1, +1, −1, −1, +1, +1, −1, +1, −1, +1, −1, −1, −1, −1, +1, −1, −1, −1, −1, −1, −1, +1, +1, +1, −1, −1, +1, +1, −1, +1, −1, +1, +1, +1, +1, +1, +1, −1, −1, +1, +1, −1, +1, −1, +1, +1, +1, +1, −1, +1, +1, −1, −1, +1, −1, +1, −1, +1, +1, +1, +1, +1, −1, −1, +1, +1, −1, +1, −1, +1, −1, −1, −1, −1, +1, −1, +1, −1, −1} on subcarriers with every fourth index; and
wherein the R-LTF80MHZ_A comprises {−1, +1, +1, −1, −1, +1, +1, −1, −1, +1, +1, −1, +1, −1, +1, +1, +1, +1, +1, +1, −1, −1, +1, +1, −1, +1, −1, +1, +1, +1, +1, +1, −1, −1, +1, +1, −1, +1, −1, +1, −1, −1, −1, −1, −1, +1, +1, −1, −1, +1, −1, +1, −1, +1, +1, +1, +1, −1, +1, −1, −1, +1, −1, −1, +1, +1, +1, −1, −1, +1, +1, −1, +1, −1, +1, +1, +1, +1, +1, +1, −1, −1, +1, +1, −1, +1, −1, +1, +1, +1, +1, −1, +1, +1, −1, −1, +1, −1, +1, −1, +1, +1, +1, +1, +1, −1, −1, +1, +1, −1, +1, −1, +1, −1, −1, −1, −1, +1, −1, +1, −1, −1, −1, +1, +1} on subcarriers with every fourth index.