LTE Attach and Default Bearer Setup - EventHelix.com

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Default Bearer Establishment EventHelix.com • telecommunication design • systems engineering • real-time and embedded systems MME SGW: Create Session Request SGW PGW: Create Session Request •The SGW asks the PGW to establish the bearer SGW PGW: Create Session Response •The PGW establishes the bearer and responds back to the SGW MME SGW: Create Session Response • The SGW responds back to the MME © 2012 EventHelix.com Inc. 6
GTP Create Session Request S11: MME SGW GTP Create Session Request IMSI RAT Type EUTRAN TEID EventHelix.com • telecommunication design • systems engineering • real-time and embedded systems • MME initiates the default route establishment by asking the SGW to create a GTP tunnel Sender F-TEID for Control Plane MME IP Address EPS Bearer Id • The source is identified by the fully qualified endpoint identifier with the Tunnel Endpoint Identifier (TEID) and the MME IP Address • The IP Address assigned to the UE is also included along with the downlink and uplink maximum data rates allowed at the APN level PDN Type Bearer Context MSISDN TAI IPV4 OR IPV6 ARP QCI MCC, MNC, TAC QCI specifies BER, Priority, GBR • The TAI and ECGI (E-UTRAN Cell Group Identifier) information identify the current location of the user ECGI Contents PGW S5/S9 Address for Control MCC, MNC, ECI TEID PGW IP Address PDN IP Address APN PDN Address Allocation IP Address Assigned to UE Aggregate Max Bit Rate APN Limit Downlink and Uplink © 2012 EventHelix.com Inc. 7
Page 1 and 2: EventHelix.com • telecommunicatio
Page 3 and 4: S1AP Initial UE Message S1AP: eNode
Page 5: Diameter Update Location Answer S6A
Page 9 and 10: SIAP Initial Context Setup Request
Page 11 and 12: Activate Default Bearer Request eNo
Page 13 and 14: Completing the Attach and Default B

LTE Attach and Default Bearer Setup - EventHelix.com

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