1. LTE rrc connection establishment is used to make transition from rrc idle to rrc connected state
2. Always initiated by UE, ( though can be triggered by nw by DL paging).Triggered by the NAS layers on attach,TAU,detach,paging,service request,extended service request.
3.UE sends RRC connection request after the random access procedure in SRB0/CCCH/UL-SCH/PUSCH. Message contents are ue identity (stmsi or a randomn identity) and the establishment cause (emergency,mo signalling, mo data, mt access, high priority access).UE starts the timer T300.
4.Network sends RRC Connection Response back to the UE in SRB0/CCCH/DL-SCH/PDSCH. Arrival is informed to the UE in PDCCH..This message contains the configuration information for SRB1
a. RLC configuration for UL & DL -Poll PDU,Poll Byte,Poll retransmission timer, Max retransmission threshhold in UL, Re-ordering timer & status prohibit timer for DL
b.Logical Channel Configuration : Priority,PBR,;CG
c.Configuration Information for Physical channels (PDSCH,PUCCH,PUSCH)
d.Uplink Power Control(p0 & delta values)
e.CQI reporting ( resource to send, pmi/ri etc)
f. Sounding Reference Signal (bw,subframe,hbw)
g.Scheduling Request (resource index, config index)
h. Antenna Configuration (no. of antenna ports, no. of antennas)
5. UE sends rrc connection setup complete with transation idetnifier,selected plmn id, registered mme (if available) and nas information
Failure Cases
==============
1.T300 expiry or cell reselection before completion of the procedure
2.RRC connection Reject ,no cause only a wait timer T302.Till the timer expires cant send another rrc connection request
Higher layers need to initiate new connection establishment procedure, No N300 concept
2. Always initiated by UE, ( though can be triggered by nw by DL paging).Triggered by the NAS layers on attach,TAU,detach,paging,service request,extended service request.
3.UE sends RRC connection request after the random access procedure in SRB0/CCCH/UL-SCH/PUSCH. Message contents are ue identity (stmsi or a randomn identity) and the establishment cause (emergency,mo signalling, mo data, mt access, high priority access).UE starts the timer T300.
4.Network sends RRC Connection Response back to the UE in SRB0/CCCH/DL-SCH/PDSCH. Arrival is informed to the UE in PDCCH..This message contains the configuration information for SRB1
a. RLC configuration for UL & DL -Poll PDU,Poll Byte,Poll retransmission timer, Max retransmission threshhold in UL, Re-ordering timer & status prohibit timer for DL
b.Logical Channel Configuration : Priority,PBR,;CG
c.Configuration Information for Physical channels (PDSCH,PUCCH,PUSCH)
d.Uplink Power Control(p0 & delta values)
e.CQI reporting ( resource to send, pmi/ri etc)
f. Sounding Reference Signal (bw,subframe,hbw)
g.Scheduling Request (resource index, config index)
h. Antenna Configuration (no. of antenna ports, no. of antennas)
5. UE sends rrc connection setup complete with transation idetnifier,selected plmn id, registered mme (if available) and nas information
Failure Cases
==============
1.T300 expiry or cell reselection before completion of the procedure
2.RRC connection Reject ,no cause only a wait timer T302.Till the timer expires cant send another rrc connection request
Higher layers need to initiate new connection establishment procedure, No N300 concept
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