erraviesh
2016-10-08, 04:29 AM
Scenario : Operator has 4G, 3G & 2G network. CSFB fallback redirection is to 3G. No 3G coverage present at testing location.
Vendor : 4G - Samsung, 2G,3G - Huawei
Testing result : All MO CSFB calls get mature in 2G , though there is no 2G details in redirection message. While all MT calls get blocked with announcement " Customer is not reachable".
Drive test observation (TEMS):
MO CSFB Call : UE searches 3G for 6 secs, CSFB call gets block and at the same automatically call attempted to 2G and get mature. (OSS stats shows call is )
MT CSFB Call : UE searches 3G for 6 secs, CSFB call gets block and UE returns to LTE.
Query : After CSFB MO get blocked when 3G not found for 6 sec, call gets automatically attempted in case of CSFB MO and gets mature in 2G, but why not this happening in case of MT CSFB.
Vendor : 4G - Samsung, 2G,3G - Huawei
Testing result : All MO CSFB calls get mature in 2G , though there is no 2G details in redirection message. While all MT calls get blocked with announcement " Customer is not reachable".
Drive test observation (TEMS):
MO CSFB Call : UE searches 3G for 6 secs, CSFB call gets block and at the same automatically call attempted to 2G and get mature. (OSS stats shows call is )
MT CSFB Call : UE searches 3G for 6 secs, CSFB call gets block and UE returns to LTE.
Query : After CSFB MO get blocked when 3G not found for 6 sec, call gets automatically attempted in case of CSFB MO and gets mature in 2G, but why not this happening in case of MT CSFB.