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Solution for code congestion
Summary
Code congestion will cause low CSSR of both CS and PS service.
We can check counters as below to find code congestion:
VS.RRC.Rej.Code.Cong+VS.RAB.FailEstCs.Code.Cong+VS.RAB.FailEstPs.Code.Cong+VS.RAC.SHO.Fail.O
VSF.Cong+VS.RAC.DCCC.Fail.OVSF.Cong+VS.RAC.HHO.CodeAssignRej.DL
Solution
Code congestion will happen in single carrier cell or F1 cell. If single carrier cell
experience very serious code congestion, expanding 2 carriers is recommended.
To solve code congestion, we recommend using LDR algorithm also. The MML
configuration is as follows:
Switch on the LDR switch:
MOD CELLALGOSWITCH: CellId=0, NBMLdcAlgoSwitch= CELL_CODE_LDR -1;
Setting LDR action:
MOD CELLLDR: CellId=0, DLLDRFIRSTACTION=CodeAdj, DLLDRSECONDACTION=BERateRed,
DlLdrBERateReductionRabNum=1, GoldUserLoadControlSwitch=ON;
Then we can monitor the counters as follows to check the effect of LDR action:
VS.LCC.LDR.BERateDL
VS.LCC.LDR.CodeAdj
VS.LCC.LDR.CodeAdj.Succ
2014-5-18 华为机密，未经许可不得扩散 第 1 页, 共 1 页