System Description

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Chapter 1 Samsung LTE System Overview

SOL230 System Description v1.0 5

 MME: Processes control messages using the NAS signaling protocol with the

SmallCell and performs control plane functions such as UE mobility

management, tracking area list management, and bearer and session

management.

 S-GW: Acts as the anchor for the user plane between the 2G/3G access system

and the LTE system and manages and changes the packet transmission layer

for downlink/uplink data.

 P-GW: Allocates an IP address to UE, acts as the anchor for mobility between

the LTE and non-3GPP access systems, and manages/changes charging and

the transmission rate according to the service level.

SmallCell EMS

The SmallCell EMS provides the user interface for the operator to operate and

maintain the SmallCell. The SmallCell EMS is responsible for software

management, configuration management, performance management and fault

management.

The EMS also interworks with service provider's Network Management System

(NMS) and carries out the Plug and Play (PnP) and SON related functions.

SeGW

Security Gateway (SeGW) provides the security tunneling to the SmallCell

connected through the public IP network. To configure the tunnel, SeGW performs

the authentication of the SmallCell by interworking with the AAA server and sets

the IPSec security tunneling to the authenticated SmallCell only.

SeGW also provides the network protection through firewall and anti-attack

features.

HSS

The Home Subscriber Server (HSS) is a database management system that stores

and manages the parameters and location information for all registered mobile

subscribers. The HSS manages key data such as the mobile subscriber's access

capability, basic services and supplementary services, and provides a routing

function to the subscribed receivers.

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