Detail flow for LTE initial call Setup

1. Initial Call Setup
UE
eNB
MME
HSS
RRC: Recv. SIB5 message in PBCH :RRC
PHY: Start random access preamble :PHY
and reconfigure Tx power
.
.
.
PHY: Recv. access indication in AICH :PHY
RRC: connection request in RACH :RRC
RRC: Connection setup request in RACH :RRC
RRC: Connection Setup Complete in RACH :RRC
S1-AP: Attach Request :S1-AP
NAS: Identity Request :NAS
NAS: Identity Response [GUTI / IMSI] :NAS
NAS: Authenticatio Request :NAS
NAS: Authenticatio Response :NAS
S6a: Authentication request
:S6a
S6a: Authentication response :S6a
S-GW
P-GW

2. Initial Call Setup
UE
eNB
MME
HSS
S-GW
P-GW
NAS: Security Mode Command :NAS
NAS: Security Mode Complete :NAS
S6a: Update Location Request :S6a
S6a: Update Location Answer :S6a
S6a: Insert-Subscriber-Data-Request :S6a
S6a: Insert-Subscriber-Data-Answer :S6a
S11: Create Session Request : S11
S5: Create Session Request :S5
S11: Create Session Response :S11
Attach Accept
S1AP: Initial Context Setup Request :S1AP
Attach Accept
RRC: Security Mode Command :RRC
RRC: Security Mode Complete :RRC
S5: Create Session Response :S5

3. Initial Call Setup
UE
eNB
HSS
MME
RRC: UE capability Enquiry :RRC
RRC: UE capability Information :RRC
S1AP: UE capability Information :S1AP
RRC: RCC connection Reconfiguration :RRC
RRC: RCC connection Reconfiguration Complete :RRC
S1AP: Initial Context Setup Complete :S1AP
S1AP: DL Info Transfer :S1AP
DL Info Transfer
UL Info Transfer
Attach Complete
S1AP: UL Info Transfer :S1AP
Attach Complete
S10: Modify Bearer Request :S10
S10: Modify Bearer Complete :S10
UL / DL Payload Data flow
S-GW
P-GW

4. Thank You
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welcome.
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