L0000312G

MMEInitial context setup request

(E-RABs, Sec keys)

RBS

Initial UEmessage

UESignalling connection setup

triggered by initial UE message

pmS1SigConnEstabAtt +

MME sends initial contextsetup request to RBS

RBS

pmUeCtxtEstabAtt +pmErabEstabAttInit +

Note: Corresponding counter per QCI: pmErabEstabAttInitQci

pmS1SigConnEstabSucc +

pmS1SigConnEstabAttEm +pmS1SigConnEstabAttHpa +pmS1SigConnEstabAttMod +pmS1SigConnEstabAttMta +pmS1SigConnEstabAttMos +

pmS1SigConnEstabAttEm +step for cause EmergencypmS1SigConnEstabAttHpa +step for cause High Prio AccesspmS1SigConnEstabAttMod +step for cause Mobile Originating DatapmS1SigConnEstabAttMta +step for cause Mobile Terminating AccesspmS1SigConnEstabAttMos +step for cause Mobile Originating Signalling

pmS1SigConnEstabSuccEm +pmS1SigConnEstabSuccHpa +pmS1SigConnEstabSuccMod +pmS1SigConnEstabSuccMta +pmS1SigConnEstabSuccMos +

Stepped for any of the following messages: S1 downlink NAS transportS1 UE context release commandS1 initial context setup requestS1 reset

pmS1SigConnEstabSuccEm +step for cause EmergencypmS1SigConnEstabSuccHpa +step for cause High Prio AccesspmS1SigConnEstabSuccMod +step for cause Mobile Originating DatapmS1SigConnEstabSuccMta +step for cause Mobile Terminating AccesspmS1SigConnEstabSuccMos +step for cause Mobile Originating Signalling

pmErabEstabAttInitArp + Stepped for each E-RAB that has the given ARP Priority Level

A

Yes

NoAny message

received on the S1 logical connection ?

RBS timeouton initial context setup

request from MME?

No

Yes

B