This message will be sent form SGW to MME to indicate establishment of GPRS Tunneling Protocol for control (GTP-C) tunnel. PDN-GW will send this response message to SGW. SGW will send create default bearer request to PDN-GW to create a EPS bearer and generate a charging ID. The UE will respond back to MME with NAS ciphering and integrity protection.Ĭreate session request message will be sent from MME to SGW too create a GTP tunnel. MME will send the encryption and integrity protection algorithm and key selection identifier (KSI-ASME). UE will send the authentication response value which was computer from the K key, AUTN and RAND MME will send authentication request to HSS, it will have K-ASME, XRES and RAND. This message will be sent via S1AP protocol and it will hve PDN connectivity request, TAI and E-UTRAN Cell Global Identifier (ECGI) UE will send RRC Connection Complete + Initiate Attach Procedure as NAS payload and PDN connectivity request.ĮNB will send the attach request to MME. This message will have configuration parameter for RLC, UL-SCH, Power Head Room and Uplink Power Control. RRC Connection Setup: eNB will send DL-SCH message to UE to create a SRB. RRC connection Request will be sent from UE to eNB which will have UE identity (S-TMSI = MMEC + M-TMSI) and establishment cause for RRC Connection request. UE will send Random Access Preamble (RAP) message to eNB to achieve uplink synchronization.

UE will read MIB and SIB from network to synchronize with the network.

Step enb