LTE OTA message - basic flow

MIB
BS>>>MS: SIP, BCCH_DL_SCH
BS>>>MS: SIP2, BCCH_DL_SCH
BS<<<MS: rrcConnectionRequest, UL_CCCH
BS>>>MS: rrcConnectionSetup, DL_CCCH
BS<<<MS: rrcConnectionSetupComplete, UL_DCCH
NAS: Attach request, ESM: PDN connectivity request
BS>>>MS: NAS: Authentication request, DL_DCCH
BS<<<MS: NAS: Authentication response, UL_DCCH
BS>>>MS: NAS: Security mode command, DL_DCCH
BS<<<MS: NAS: Security mode complete, UL_DCCH
BS>>>MS: securityModeCommand, DL_DCCH
BS<<<MS: securityModeComplete, UL_DCCH
BS>>>MS: ueCapabilityEnquiry, DL_DCCH
BS<<<MS: ueCapabilityInformation, UL_DCCH
BS>>>MS: rrcConnectionReconfiguration, DL_DCCH
NAS: Attach accept, ESM: Activate default EPS bearer context request
BS<<<MS: rrcConnectionReconfigurationComplete, UL_DCCH
BS<<<MS: NAS: Attach complete, UL_DCCH
ESM: Activate default EPS bearer context accept
BS<<<MS: NAS: PDN connectivity request(IPv4, IPv6), UL_DCCH