linhhy
2018-04-19, 12:51 PM
Dear friends,
I'm optimizing CSFB CST from LTE to GERAN. I deployed CSFB with RIM feature to reduce the time for UE reading 2G SIB after redirection from LTE. But I saw 2 different cases with Sony XZ Premium and Samsung Note 5. Sony XZ Premium has less time to start "CM service request" when compared to Samsung Note 5, it means less CSFB CST. Samsung Note 5 needs to wait for SIB 2 type before starting "CM service request" while Sony XZ did not.
Based on the standard (3GPP 44.108 3.2.1) MS no need to re-read any message if it has in the E-UTRA RRCConnectionRelease message. It's different with the real test case.
Could anyone can help me the reason why does the MS read some SIB in 2G before making "CM Service Request" and Why does it have the different procedure on 2 phones.
Many thanks,
:4132141322
I'm optimizing CSFB CST from LTE to GERAN. I deployed CSFB with RIM feature to reduce the time for UE reading 2G SIB after redirection from LTE. But I saw 2 different cases with Sony XZ Premium and Samsung Note 5. Sony XZ Premium has less time to start "CM service request" when compared to Samsung Note 5, it means less CSFB CST. Samsung Note 5 needs to wait for SIB 2 type before starting "CM service request" while Sony XZ did not.
Based on the standard (3GPP 44.108 3.2.1) MS no need to re-read any message if it has in the E-UTRA RRCConnectionRelease message. It's different with the real test case.
Could anyone can help me the reason why does the MS read some SIB in 2G before making "CM Service Request" and Why does it have the different procedure on 2 phones.
Many thanks,
:4132141322