RRC Connection Setup Complete

·         Upon receiving an RRC Connection Setup message, the UE stops the T300 timer and makes the transition to RRC Connected mode. The UE then proceeds to complete the procedure by sending an RRC Connection Setup Complete message. The content of the RRC Connection Setup Complete message is shown in Table

·         After receiving the RRC Connection setup message, UE complete the three way handshake procedure by sending ‘RRC Connection setup complete’ message and moves to RRC Connected mode.

·         The message contains following information

·         selectedPLMN-Identity:  This is equal to 1 if UE selects the first PLMN from the plmn-identityList included in SIB1 or 2 if the second PLMN is selected in case UE belongs to more than one PLMN

·        

        DedicatedInfoNAS:  This IE is used to transfer UE specified NAS layer information between network and UE.

RrcConnectionSetupComplete {

            rrc_TransactionIdentifier = 1

            CriticalExtensions {

               c1 {

                  RrcConnectionSetupComplete-r8 {

                     selectedPLMN_Identity = 1

                     DedicatedInfoNAS = 0x0102030405060708090a

                  }

               }

            }

         }

RRCconnectionsetup

·          

·         The Transaction Identifier, combined with the message type, identifies the RRC procedure with the UE

·         The Selected PLMN Identity defines a pointer to a PLMN listed within SIB1, i.e. UE select the PLMN to which they want to connect when a cell belongs to more than a single PLMN .

·         The Registered MME information is optional, and is included when available. It becomes available after a UE has registered with an MME. The MME is identified by its Globally Unique MME Identity (GUMMEI) which is a concatenation of the PLMN identity,MME Group Identity (MMEGI) and MME Code (MMEC). The MMEC identifies the MME within its group

·         The UE also includes its initial Non-Access Stratum (NAS) message within the RRC Connection Setup Complete message. NAS messages are specified within 3GPP TS 24.301. As indicated within Table 131, the NAS message could be an Attach, Detach, Tracking Area Update, Service Request or Extended Service Request message.

·         The eNodeB extracts the NAS message from the RRC Connection Setup Complete message and forwards it to an MME using the S1 Application Protocol (S1-AP) Initial UE Message. Forwarding this message does not form part of the RRC establishment procedure but is described within this section for completeness