The MME signals the S-GW and P-GW to create a "Default Bearer," which provides the user with an "always-on" IP connectivity.
Once the UE arrives at the new cell, the MME tells the S-GW to switch the user plane path to the target eNodeB. 3. UE-Requested PDN Connectivity The MME signals the S-GW and P-GW to
If a user needs an additional service (like a specific APN for Work or IMS for VoLTE), a secondary PDN connection is established. The UE sends a . The MME validates the request with the HSS and PCRF. UE-Requested PDN Connectivity If a user needs an
A new may be created with specific Quality of Service (QoS) parameters tailored for that application (e.g., lower latency for gaming or guaranteed bit rate for video). Technical Documentation and Resources A new may be created with specific Quality
The MME coordinates with the target eNodeB and S-GW to reserve resources.
Once the bearer is established, the MME sends an Attach Accept message to the UE, and the data path is opened. 2. S1-Based Handover