LTE S1 Handover过程中信息交互
2011-11-09 16:41
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Msg Name | Entities | Comment |
RRC: MeasurementReport | UE->eNB | measConfig settled in ConnectionReconfiguration |
S1AP: Handover Required | SeNB->MME | HO UE and Target Info & Source to Target transparent container |
S1AP: Handover Request | MME->TeNB | Include E-RABs, UE security, Source to Target transparent container etc TeNB alloc resource for admitted E-RABs |
S1AP: Handover Request Acknowledge | TeNB->MME | Failed and admitted E-RABs, Target to Source transparent container included |
S1AP: Handover Command | MME->SeNB | E-RAB (forward & release) list, Target to Source Transparent container |
RRC: ConnectionReconfiguration | SeNB->UE | MobilityControlInfo included notifying UE for handover; This message includes target eNB’s config |
S1AP: eNB Status Transfer | SeNB->MME | PDCP SN receiver and transmitter status included |
S1AP: MME Status Transfer | MME->TeNB | PDCP SN receiver and transmitter status included |
Msg1-2 (Msg3 if contention based) | TeNB<->UE | RACH (done right after ConnectionReconfig received, parallel with S1AP msg exchange) |
RRC Connection Reconfiguration Complete | UE-> TeNB | Send in UL data to confirm the handover |
S1AP: Handover Notify | TeNB->MME | Notify MME UE arrived, S1 handover complete |
S1AP: UE Context Release Command | MME->SeNB | Notify source eNB to release UE context |
S1AP: UE Context Release Complete | SeNB->MME | release all related signalling and user data transport resources |
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