注:下表所列信息交互,包含所有與eNB相關信息(ue <->eNB<->EPC)
Msg Name |
Entities |
Comment |
S1 SETUP REQUEST |
eNB->NW |
S1AP setup |
S1 SETUP RESPONSE |
NW -> eNB |
|
MIB, SIB1, SIBX |
eNB-> UEs |
Broadcast Info |
MSG1 |
UE->eNB |
Preamble |
MSG2 |
eNB->UE |
With RA-RNTI |
MSG3 |
UE->eNB |
TM data (RRC Conn Request) |
DL data |
eNB-> UE |
Copied from MSG3 48b |
RRC Connection Setup |
eNB->UE |
TM data CCCH |
RRC Connection Setup Complete |
UE->eNB |
AM data (include NAS Attach Request) |
S1AP: NAS INITIAL UE MESSAGE |
eNB->NW |
Pass the NAS info to MME |
S1AP: INITIAL CONTEXT SETUP REQUEST |
NW->eNB |
Include E-RAB, UE Radio Capability IE and etc. Attach Accept |
RRC: UECapabilityEnquiry |
eNB-> UE |
AM: Enquiry RA capability for specific RAT (E-UTRA) |
RRC: UECapabilityInformation |
UE->eNB |
AM: known by RAT only |
S1: UE CAPABILITY INFO INDICATION |
eNB->MME |
Forward UE’s Capability Info |
RRC:SecurityModeCommand |
eNB->UE |
Set securityConfigSMC |
RRC: SecurityModeComplete |
UE->eNB |
To confirm the security setting |
RRC: Connection Reconfiguration |
eNB->UE |
NAS pdu from initial context setup request to Establish DRB |
RRC Connection Reconfiguration Complete |
UE-> eNB |
To confirm the Connection Reconfiguration |
S1AP: Initial context setup response |
eNB-> NW |
E-RAB Setup & failed setup list |
RRC: ULInformationTransfer |
UE->eNB |
NAS or non-3GPP info (Attach complete) |
S1 AP: UL NAS TRANSPORT |
eNB->MME |
Forward UL Info Transfer |