• batuhanduyuler's avatar
    N2 Handover Source gNB Implementation · 10629df5
    batuhanduyuler authored
    - Triggering the Handover
    	- gNB finds the best neighbour (only RSRP based)
    	- gNB decides triggering the HO according to condition
    		- bestRsrp > servingCellRSRP + HO Margin
    		- HO Margin is an optimization parameter
    		- For now HO Margin set to 0.
    
    	- gNB prepares the current RRC Reconfiguration and binds to Handover
    Preparation Information
    	- gNB sends NGAP Handover Required Message towards AMF
    
    - Reception of Handover Command Message on CU
    	- Parsing of the message
    	- gNB extracts the target gNB's RRC Reconfiguration from Handover Command
    	- Wraps the target gNB's RRC Reconfiguration within DL DCCH Message
    	- Prepares F1AP UE Context Modification Message
    	- Sets Transmission Action Indicator to stop
    	- Sends the RRC Reconfiguration with UE Context Modification
    - Reception of UE Context Modification on DU
    	- Pushes to RRC reconfiguration to RLC
    	- transmission_stop flag is added under UE_sched_ctrl
    	- if UE_sched_ctrl is true, gNB stops scheduling of the UE
    	- DU sends UE Context Modification Response
    10629df5
f1ap_du_ue_context_management.c 81.6 KB