US 12,237,922 B2
Data retransmission method and communication apparatus
Weimin Wu, Wuhan (CN); Zheng Xiao, Wuhan (CN); and Jian Yu, Shenzhen (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Mar. 11, 2022, as Appl. No. 17/692,306.
Application 17/692,306 is a continuation of application No. PCT/CN2020/114876, filed on Sep. 11, 2020.
Claims priority of application No. 201910863502.X (CN), filed on Sep. 12, 2019.
Prior Publication US 2022/0200732 A1, Jun. 23, 2022
Int. Cl. H04L 1/08 (2006.01); H04L 1/00 (2006.01)
CPC H04L 1/08 (2013.01) [H04L 1/0009 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A data retransmission method, comprising:
receiving, by a first device, a physical protocol data unit (PPDU) from a second device, wherein the PPDU comprises a signaling field and a data field, the data field comprises retransmitted data and newly transmitted data, the signaling field comprises (1) first indication information or (2) the first indication information and second indication information, wherein the first indication information is used to indicate a first modulation and coding scheme (MCS) and a first coding mode that are used for the newly transmitted data, and the second indication information is used to indicate a second MCS and a second coding mode that are used for the retransmitted data, and wherein the data field comprises M OFDM symbols in time domain, and a quantity of symbols occupied by the newly transmitted data in the data field is calculated according to the following formula:
M-ceil (L/K), wherein:
L is a total quantity of bits of the retransmitted data, K is a quantity of bits that are used to carry data on each of the M OFDM symbols, ceil ( ) indicates rounding up, and M, L, and K are positive integers; and
demodulating the PPDU based on the signaling field.