4g Lte Evolved Packet Core Epc Concepts And Call Flows Download Hot Fix Online

A central database that contains user-related and subscription-related information. It performs authentication and authorization of the user.

This is the primary document covering the GPRS enhancements for E-UTRAN access, detailing the architecture and every major call flow in the EPC. If a user needs an additional service (like

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. The "brain" of the control plane

The "brain" of the control plane. it handles signaling related to mobility and security for E-UTRAN access. It is responsible for tracking and paging UEs (User Equipment) in idle mode. If a user needs an additional service (like

The source eNodeB determines a handover is needed based on signal strength and sends a request to the MME.