In which two scenarios is a create bearer request sent from the SGW to the SGSN on the S4 interface? (Choose two.)
A. secondary PDP context activation procedure
B. network-requested secondary PDP context activation procedure
C. network-triggered service request procedure
D. when downlink data arrives for the released bearers
E. PGW restart restoration procedure
In which two scenarios is a create bearer request sent from the SGW to the SGSN on the S4 interface? (Choose two.)
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In which two scenarios is a create bearer request sent from the SGW to the SGSN on the S4 interface? (Choose two.)
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