sourceEnbRrc
UeRrc
UeMac
UePhy
EnbPhy
EnbMac
FfSched
EnbRrc
X2: HO req
SendRachPreamble (PRACH ID)
start non-contention based MAC Random Access Procedure
HandoverReque
st (newly allocated C-RNTI + LC list)
CSCHED_UE_CONFIG_ …
CSCHED_UE_CONFIG_ …
CSCHED_LC_CONFIG_REQ (all active DRBs)
f,…, 63 + PRACH mask
CSCHED_LC_CONFIG_ …
HandoverConfirm (PRACH ID in 63-Nc
X2: HO ack incl. MobilityControlInfo
RrcConnectionReconfiguration with Mobil ityControlInfo (incl. RACH-ConfigDedicat ed over SRB1
Handover (new C-RNTI, PRACH ID+Mas k)
SendOverCcch (RrcConnectionReconfigu rationRequest)
determine RA-RNTI fr om PRACH ID
Rx RAR
RachPreamble over RACH
NotifyRxRachPreamble (PRACH ID)
SubframeIndication
SCHED_DL_RACH_INFO_REQ (RNTI li st)
SCHED_DL_TRIGGER_ …
NotifyRandomAccessProcedureEndOk
SCHED_DL_CONFIG_IND (RAR list with UL grant per RNTI))
Send RAR with RA-RNTI identifying prea mbleId
RAR over PDSCH
end non-contention based MAC Random Access Procedure
SendOverUlsch (RrcConnectionReconfig urationCompleted)
TX over PUSCH
RxOverUlsch (RrcConnectionReconfigura tionCompleted)
RxOverCcch (RrcConnectionReconfigurationCompleted)