Optimize CSSR PS in Huawei

dear all,
how to optimize the CSSR PS in huawei?
i have change the paramters of :
HS PDSCH Min Code Num,
UL Total equivalent user number,
DL LDR trigger threshold
resultat is not ok,
plz help me

Cssr is made up of two parts, rrc and Rab SR
Which of them is low

most probably he talked about RAB SR becase he tried to optimize UL Total equivalent user number which is related with PS RAB