Section 2.1 S1 Setup

• 正常流程
• 异常流程
  • S1初始化失败
• Message
  • S1SetupRequest
  • S1SetupResponse
  • S1SetupFailure
    • S1SetupFailure Cause

正常流程

S1初始化

1. S1SetupRequest. <>
2. S1SetupResponse. <>
3. ENB Direct Information Transfer.<>

异常流程

S1初始化失败

Message

S1SetupRequest

S1SetupRequest ::= SEQUENCE {
   protocolIEs ProtocolIE-Container { {S1SetupRequestIEs} },
   ...
}

S1SetupRequestIEs S1AP-PROTOCOL-IES ::= {
   { ID id-Global-ENB-ID CRITICALITY reject TYPE Global-ENB-ID PRESENCE mandatory}|
   { ID id-eNBname CRITICALITY ignore TYPE ENBname PRESENCE optional}|
   { ID id-SupportedTAs CRITICALITY reject TYPE SupportedTAs PRESENCE mandatory}|
   { ID id-DefaultPagingDRX CRITICALITY ignore TYPE PagingDRX PRESENCE mandatory}|
   { ID id-CSG-IdList CRITICALITY reject TYPE CSG-IdList PRESENCE optional}|
   { ID id-UE-RetentionInformation CRITICALITY ignore TYPE UE-RetentionInformation PRESENCE optional},
   ...
}

S1SetupResponse

S1SetupResponse ::= SEQUENCE {
   protocolIEs ProtocolIE-Container { {S1SetupResponseIEs} },
   ...
}

S1SetupResponseIEs S1AP-PROTOCOL-IES ::= {
   { ID id-MMEname CRITICALITY ignore TYPE MMEname PRESENCE optional}|
   { ID id-ServedGUMMEIs CRITICALITY reject TYPE ServedGUMMEIs PRESENCE mandatory}|
   { ID id-RelativeMMECapacity CRITICALITY ignore TYPE RelativeMMECapacity PRESENCE mandatory}|
   { ID id-MMERelaySupportIndicator CRITICALITY ignore TYPE MMERelaySupportIndicator PRESENCE optional}|
   { ID id-CriticalityDiagnostics CRITICALITY ignore TYPE CriticalityDiagnostics PRESENCE optional}|
   { ID id-UE-RetentionInformation CRITICALITY ignore TYPE UE-RetentionInformation PRESENCE optional},
   ...
}

S1SetupFailure

S1SetupFailure ::= SEQUENCE {
   protocolIEs ProtocolIE-Container { {S1SetupFailureIEs} },
   ...
}

S1SetupFailureIEs S1AP-PROTOCOL-IES ::= {
   { ID id-Cause CRITICALITY ignore TYPE Cause PRESENCE mandatory }|
   { ID id-TimeToWait CRITICALITY ignore TYPE TimeToWait PRESENCE optional }|
   { ID id-CriticalityDiagnostics CRITICALITY ignore TYPE CriticalityDiagnostics PRESENCE optional },
   ...
}

S1SetupFailure Cause

Cause ::= CHOICE {
   radioNetwork CauseRadioNetwork,
   transport CauseTransport,
   nas CauseNas,
   protocol CauseProtocol,
   misc CauseMisc,
   ...
}

CauseMisc ::= ENUMERATED {
   control-processing-overload,
   not-enough-user-plane-processing-resources,
   hardware-failure,
   om-intervention,
   unspecified,
   unknown-PLMN,
   ...
}

CauseProtocol ::= ENUMERATED {
   transfer-syntax-error,
   abstract-syntax-error-reject,
   abstract-syntax-error-ignore-and-notify,
   message-not-compatible-with-receiver-state,
   semantic-error,
   abstract-syntax-error-falsely-constructed-message,
   unspecified,
   ...
}

CauseRadioNetwork ::= ENUMERATED {
   unspecified,
   tx2relocoverall-expiry,
   successful-handover,
   release-due-to-eutran-generated-reason,
   handover-cancelled, 
   partial-handover, 
   ho-failure-in-target-EPC-eNB-or-target-system,
   ho-target-not-allowed,
   tS1relocoverall-expiry,
   tS1relocprep-expiry,
   cell-not-available,
   unknown-targetID,
   no-radio-resources-available-in-target-cell,
   unknown-mme-ue-s1ap-id,
   unknown-enb-ue-s1ap-id,
   unknown-pair-ue-s1ap-id,
   handover-desirable-for-radio-reason,
   time-critical-handover,
   resource-optimisation-handover,
   reduce-load-in-serving-cell,
   user-inactivity,
   radio-connection-with-ue-lost,
   load-balancing-tau-required,
   cs-fallback-triggered,
   ue-not-available-for-ps-service,
   radio-resources-not-available,
   failure-in-radio-interface-procedure,
   invalid-qos-combination,
   interrat-redirection,
   interaction-with-other-procedure,
   unknown-E-RAB-ID,
   multiple-E-RAB-ID-instances,
   encryption-and-or-integrity-protection-algorithms-not-supported,
   s1-intra-system-handover-triggered,
   s1-inter-system-handover-triggered,
   x2-handover-triggered,
   ...,
   redirection-towards-1xRTT,
   not-supported-QCI-value,
   invalid-CSG-Id
}

CauseTransport ::= ENUMERATED {
   transport-resource-unavailable,
   unspecified,
   ...
}

CauseNas ::= ENUMERATED {
   normal-release,
   authentication-failure,
   detach,
   unspecified,
   ...,
   csg-subscription-expiry
}