US 12,457,080 B2
Data transmission method and device
Qiuping Huang, Beijing (CN); Runhua Chen, Beijing (CN); and Qiubin Gao, Beijing (CN)
Assigned to DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
Appl. No. 17/602,767
Filed by DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
PCT Filed Apr. 10, 2020, PCT No. PCT/CN2020/084200
§ 371(c)(1), (2) Date Oct. 10, 2021,
PCT Pub. No. WO2020/207473, PCT Pub. Date Oct. 15, 2020.
Claims priority of application No. 201910286797.9 (CN), filed on Apr. 10, 2019.
Prior Publication US 2022/0158801 A1, May 19, 2022
Int. Cl. H04L 5/00 (2006.01)
CPC H04L 5/0053 (2013.01) 17 Claims
OG exemplary drawing
 
1. A data transmission method applied to a first device, comprising:
sending a first signal and a demodulation reference signal (DMRS) corresponding to the first signal to a second device, wherein the first signal comprises at least one layer, and each layer corresponds to a plurality of DMRS ports;
wherein different DMRS ports correspond to at least one of different power amplifiers (PAs), different sounding reference signal (SRS) ports, or different first signal ports, where each of the first signal ports comprises a port of the first signal;
wherein the transmission of a same layer in the first signal corresponds to different DMRS ports at least two frequency domain locations;
wherein the sending the first signal to the second device comprises:
sending the first signal to the second device through a first transmission mode, wherein the first transmission mode comprises at least one of the following:
each layer of the first signal being transmitted on all PRBs (physical resource blocks) of the transmission resource indicated by the second device for the first device; or each layer of the first signal being only transmitted on a PRB where the DMRS port corresponding to the layer is located;
and/or,
wherein the sending the first signal and the DMRS corresponding to the first signal to the second device comprises:
sending the first signal and the DMRS corresponding to the first signal to the second device according to second information;
wherein, the second information has been received from the second device, and the second information indicates at least one of the following:
a first power control strategy used by the first device;
the first device sending the first signal and the DMRS corresponding to the first signal with the maximum transmission power;
a transmission mode of the first signal;
a precoding matrix of the first signal being a codeword whose number of transmission streams is less than or equal to K, where K is an integer greater than or equal to 1;
the number of transmission streams of the first signal being less than or equal to M, where M is an integer greater than or equal to 1;
the precoding matrix of the first signal being a noncoherent codeword;
the precoding matrix of the first signal being a partially coherent codeword;
the precoding matrix of the first signal is the noncoherent codeword or the partially coherent codeword.