How can I activate RIM in Huawei 3G?
Is via this command?
Use this command:
SET URRCTRLSWITCH: PROCESSSWITCH2=FAST_CS_FB_BASEDON_RIM_SWITCH-1;
Is it license based?
RIM can be activated in: 4G eNodeB, 3G RNC, MME/SGSN also.
In 3G, 4G Huawei RAN we can trace message, KPI to check RIM sent/receive messages.
But also Core network engineers have to join troubleshooting.
This also needs to be match on the CN.
There is also a change on S1 on the release needs to be rel10 min, as I remember.
Ran and core must be at least supporting release 9.
Anyone activated RIM already?
Could you please share finding after the implementation?
Long time ago. It was useful but don’t think there were significant benefits.
Any drawback you remember?
I will check. It was in 2017 I think. So I am sure algorithm has evolved since.
RIM help CSFB time reduce alot.
About 1s for mo-mt call.
eNB send UE “rrc conn release” with 3G cells PCI + SI.
So, reducing time UE reading SI in UMTS, then CSFB time reduced.
So the eNB will have became more intelligent in case of CSFB only. Great!
By active RIM, enb can get neigjboring umts cells information.
Rnc → sgsn → mme → enb SI of 3g.
Yes it improves CSFB call set up time.
For 2G ~2sec + 3G ~1sec.