How can i pioritize Upstream packets Over Downstream?

my modem is zte ZXHN H168N V3.1 and my router is pc ( openwrt x86)

and these are my vdsl status:
Link Status Up

Modulation Type VDSL2

Actual Rate(Up/Down) 5005/39999 kbps

Attainable Rate(Up/Down) 30628/138444 kbps

Noise Margin(Up/Down) 37.8/20.2 dB

Line Attenuation(Up/Down) 0.3/8.2 dB

Output Power(Up/Down) 4.1/13.6 dBm

Data Path(Up/Down) Interleaved/Interleaved

Interleave Depth(Up/Down) 49/2531

Interleave Delay(Up/Down) 5/9 ms

INP(Up/Down) 2/8.9 symbols

Profile 17a

Showtime Start 6 h 13 min 5 s

LinkEncap G.993.2_Annex_K_PTM

CRC Errors(Up/Down) 0/6

FEC Errors(Up/Down) 77/33479