MCG ,SCG, SPLIT Bearer and Use Case's
Talk about MCG /SCG and Split Bearers For EN-DC three bearer types exist those are 1. MCG Bearer 2. SCG Bearer 3. Split Bearer In ENDC , Network can configure either E-utran PDCP or NR PDCP for MCG bearer whereas NR PDCP is must for SCG bearer and Split bearer Data Flow : MCG Bearer Using NR PDCP User plane data flow from the NR PDCP to LTE RlC Via MenB MCG Bearer using E-utran PDCP User plane data flow from the E-utran PDCP to LTE RlC Via MenB SCG bearer SCG bearer always Uses NR PDCP , and the data flow is from NR -PDCP to NR-RLC and NR-MAC via Senb Split Bearer Split bearer also Uses NR PDCP and the data flow is from NR-PDCP to LTE-RLC & NR-RLC For ex: DRB -5 -LCID-4 (LTE-RLC ) and LCID-5(NR-RLC) NR PDCP can be created using R15 IE's...