Truls Hjelle - CCIE at Age 64

Truls Hjelle Senior Network Consultant from Ventelo Networks got his CCIE at almost 64 years of age, but 41 years ago he first became interested in networking while working on one of the first data communication networks in Norway. He imagined being a mathematician as a child but instead discovered his passion for IT. Listen to his story in this audio interview.

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Mobility Management Entity

MME is Mobility Management Entity, control node of SAE/EPC architecture. It works simultaneously with access network and core network with different interfaces. Access Network is network which is facing towards eNodeB and core network is that network which is facing towards S-Gateway/P-Gateway.

Interfaces of MME

·         S1-MME:- This interfaces is facing towards enodeB. A very crucial interface which is responsible for UE management with various different type of control messages.

·         S11:- This interface is facing towards S-Gateway

·         S6a:- This interface is facing towards HSS

   

Functions of MME

     Below is the list of functions performed by S1-MME interfaces:-

·         Network Access Control

·         Radio Resource Management

·         Mobility Management(Handover Management)

·         Roaming management

·         UE Reach ability

·         Tracking Area Management

·         Load balancing Between different S gateway

·         Paging

·         Session Management

·         Location Aware Applications

      Below is the list of functions performed by S11 interfaces

·         PDN Gateway and Serving Gateway selection on the basics of DNS

·         Bearer Activation and Deactivation Responsible for handovers from LTE to 3G circuit switched domain in case of voice calls. 

        Lawful Intercept