call re establishement

[mounir34]

Hi Guys

i wanna share with you this abnormal phenomena on RAN 15 after open Enhancement and Optimization Switches related to Re-Establishment Feature:

improvements:
1- CS & PS Drop Call Decreased
2- HSPA RAB Setup Success Rate Enhanced a lot from 99.2 % to 99.8% .

abnormal Degradation:
the PS R99 RAB Setup success Rate degraded from 99.5 % to 90 % suddenly which is abnormal. failures are coming With Reason "Cell Update Failure FHHO" , this KPI degraded greatly because number of R99 RAB attempts very Few (2000 attempts per day) and this why if 200 of them are failures , The failure rate will be 10 % .
i switched off the "RB_SETUP_RL_REEST_SWITCH" under SET URRCTRLSWITCH command and R99 RAB Setup Success Rate Back to its Normal Trend 99.5 %, but the HSPA RAB Setup Success Rate Decreased about 0.3 % .

is any one Faced similar problem and is there any Suggestion to balance between R99 & HSPA Rab setup Success Rate without switching off "RB_SETUP_RL_REEST_SWITCH" because it is very good Parameter.

thanks
Mounir

[samcooldude1430]

we also implemented the same but dint observe any such PS RAB degrdation. Try with the following settings

SET URRCTRLSWITCH: OptimizationSwitch=PS_RL_SETUP_SWITCH-1, CS_RL_SETUP_SWITCH-1;

SET URRCTRLSWITCH: PROCESSSWITCH4=IUR_RL_REEST_SWITCH-1;

SET URRCTRLSWITCH: PROCESSSWITCH4=TRB_RESET_RL_REEST_SWITCH-1, OptimizationSwitch=SRB_RESET_RL_SETUP_SWITCH-1&RLFAIL_RL_SETUP_SWITCH-1&RL_RESTORE_SWITCH-1;

SET URRCTRLSWITCH: OptimizationSwitch=ASU_RL_RESET_SWITCH-1&MC_RL_RESET_SWITCH-1;

SET URRCTRLSWITCH: PROCESSSWITCH4=PHY_RECFG_REEST_SWITCH-1&PHYCHRECFG_ENH_RL_REEST_SWITCH-1;

SET URRCTRLSWITCH: PROCESSSWITCH4=RB_SETUP_RL_REEST_SWITCH-1&RB_SETUP_ENHANCE_RL_REEST_SWITCH-1;

SET URRCTRLSWITCH: PROCESSSWITCH4=RBRECFG_ENH_RL_REEST_SWITCH-1, OptimizationSwitch=RB_RECFG_RL_REEST_SWITCH-1, ImprovementSwitch=NON_DCCC_RBRECFG_RL_REEST_SWITCH-1;

SET URRCTRLSWITCH: PROCESSSWITCH4=RB_REL_RL_REEST_SWITCH-1;

SET URRCTRLSWITCH: ImprovementSwitch=SMC_RL_REEST_SWITCH-1;

SET URRCTRLSWITCH: PROCESSSWITCH4=IRATHO_HOCANCEL_RL_REEST_SWITCH-1

[P.T.E.]

Hi Guys

i wanna share with you this abnormal phenomena on RAN 15 after open Enhancement and Optimization Switches related to Re-Establishment Feature:

improvements:
1- CS & PS Drop Call Decreased
2- HSPA RAB Setup Success Rate Enhanced a lot from 99.2 % to 99.8% .

abnormal Degradation:
the PS R99 RAB Setup success Rate degraded from 99.5 % to 90 % suddenly which is abnormal. failures are coming With Reason "Cell Update Failure FHHO" , this KPI degraded greatly because number of R99 RAB attempts very Few (2000 attempts per day) and this why if 200 of them are failures , The failure rate will be 10 % .
i switched off the "RB_SETUP_RL_REEST_SWITCH" under SET URRCTRLSWITCH command and R99 RAB Setup Success Rate Back to its Normal Trend 99.5 %, but the HSPA RAB Setup Success Rate Decreased about 0.3 % .

is any one Faced similar problem and is there any Suggestion to balance between R99 & HSPA Rab setup Success Rate without switching off "RB_SETUP_RL_REEST_SWITCH" because it is very good Parameter.

thanks
Mounir

Dear Mounir,

its a bug in the software release, and the work around is to disable "RB_SETUP_RL_REEST_SWITCH" if call re-establishment is enabled, the bug make some failures on HS are to be counted on R99, that's way HS RAB improved while R99 RAB degraded.

BR,