Fraunhofer FOKUS Competence Center NGNI

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Marius Corici, Prof. Dr. Thomas Magedanz, Dragos Vingarzan Fraunhofer Institute FOKUS, Germany marius-iulian.corici@fokus.fraunhofer.de thomas.magedanz@fokus.fraunhofer.de dragos.vingarzan@fokus.fraunhofer.de

Unleashing the potential of virtualization by the right toolkits and open testbeds Lessons learned from implementing a virtualized

3GPP EPC toolkit

Fraunhofer FOKUS Competence Center NGNI

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Agenda

n Understand the transition towards virtual core networks n Background

3GPP Evolved Packet Core architecture Network Functions Virtualization

n What does Mobile Core Network virtualization really mean n Core network as a software n Mobile Core Network beyond EPC n Fraunhofer FOKUS OpenEPC Testbed Realization n Summary and Conclusions

Fraunhofer FOKUS Competence Center NGNI

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The control of Telcos is getting smaller IMS/EPC as last resort??

Classic Telco Voice Evolution

Over the Top Multimedia Services Evolution

IP

CS

NGN

All IP

SDP

EPC IMS

n All IP Networks will pave the road for Over the Top (OTT) Application n Evolved telecom platforms will provide revenue potentials via Service

Gateways (open APIs), VoIP (IMS) and Smart Bit pipe approaches (EPC)

VoIP

IN

NGN

IM Communities

Future Internet

I. of Services I. of Things Net. of the

Future

2010 ??? 2006

Over the Top Apps Clouds

RCS VoLTE

MTC

Service Gateway (Open APIs)

Fraunhofer FOKUS Competence Center NGNI

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Agenda

n Understand the transition towards virtual core networks n Background

3GPP Evolved Packet Core architecture Network Functions Virtualization

n What does Mobile Core Network virtualization really mean Core network as a software

n Mobile Core Network beyond EPC n Fraunhofer FOKUS OpenEPC Testbed Realization n Summary and Conclusions

Fraunhofer FOKUS Competence Center NGNI

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Evolved Packet Core (EPC)

n EPC is part of the 3GPP Evolved Packet System (EPS) n The EPC is a multi-access core network based on the Internet Protocol (IP) one

common packet core network for both trusted networks including

n 3GPP Access (LTE-E-UTRAN, UMTS-UTRAN, GPRS-GERAN) n Non 3GPP Access (WIMAX, CDMA2000/HRPD)

and untrusted networks including n Non-3GPP Access (WLAN)

n EPC provides connection to IP service domains IMS Internet (or others, e.g. P2P etc.)

n Important EPC functions include: NAS and security (AAA) mobility and connectivity management policy QoS control and charging (PCC)

IMS

Evolved Packet Core

Internet

3GPP Access

e.g. LTE

Non 3GPP Access

trusted trusted / untrusted

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3GPP EPC Architecture

3GPP Accesses

Trusted Non-3GPP

Untrusted Non-3GPP

S-GW

PDN GW ANGw

ePDG

MME PCRF

n Gateways Access Network Specific and Centralized Data forwarding Unified policy based Enforcement Transparent Mobility

n Control Entities Subscription based: Mobility Management in 3GPP

accesses Policy and Charging decisions

n Based on the App. requirements Access Network Discovery and

Selection n Subscription Entities

Home Subscriber Server Imported from IMS

AAA server for communication with non-3GPP Accesses

ANDSF

AAA Server

HSS AF

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3GPP EPC Protocols

3GPP Accesses

Trusted Non-3GPP

Untrusted Non-3GPP

S-GW

PDN GW ANGw

ePDG

MME PCRF

n Mobility and forwarding protocols GPRS Tunneling Protocol (GTP) Proxy Mobile IP (PMIP) Mobile IP (MIP)

n Control protocols Diameter for the communication

with: n Subscription Repositories n Applications n Enforcement Points

n Communication with Mobile Devices

OMA Device Management (DM)

ANDSF

AAA Server

HSS AF

Diameter OMA DM over HTTP/other GTP/PMIP IP

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3GPP EPC Functional Features

3GPP Accesses

Trusted Non-3GPP

Untrusted Non-3GPP

S-GW

PDN GW ANGw

ePDG

MME PCRF

n Network Access Control Functions Authentication and Authorization IP reachability context Indirection tunnel establishment Default bearer is initialized

n Resource Management Functions Application and UE triggered

resource reservations Policy based decisions Enforcement of QoS rules on the

data path n Mobility Management Functions

Intra-3GPP MME controlled n Soft handovers

With non-3GPP ANDSF assisted n Only hard handovers (except

CDMA 2000)

ANDSF

AAA Server

HSS AF

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Clouds (SaaS)

EPC Capabilities = Ubiquitous IP Connectivity to the Cloud

n The EPC allows multiple access networks to be connected in a controlled way (secure, QoS, seamless) to either the operator IP cloud (e.g. IMS or any intranet) the internet or others

n Note that the EPC provides controlled IP connectivity, in regard to User authentication and authorization Quality of Service and related Charging Mobility Management

E-UTRAN

User Equipment may be connected to

several IP service domains in parallel

EPC

UTRAN

WiMAX

WLAN

EPC = IP Connectivity

IMS

Internet

Packet GW

Packet GW

SIP

HTTP / ???

EPC = IP Connectivity

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Network Functions Virtualization vs. current network architectures

n Definition: Network Functions Virtualization aims to transform the way that network operators

architect networks by evolving standard IT virtualization technology to consolidate many network equipment types onto industry standard high volume servers, switches and storage, which could be located in Data Centres, Network Nodes and in the end user premises, as illustrated in Figure 1.

It involves the implementation of network functions in software that can run on a range of industry standard server hardware, and that can be moved to, or instantiated in, various locations in the network as required, without the need for installation of new equipment.

n Network Functions Virtualization (NFV) presumes that network functions are: Software implementations (software programs) of the current network components

n Software technologies brought the success of Internet by separating hardware life-cycle from application life-cycle - i.e. all IP services use this paradigm

Running on top of standard server hardware architectures n No dedicated hardware gives a high liberty on program placement, merging, etc.

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Agenda

n Understand the transition towards virtual core networks n Background

3GPP Evolved Packet Core architecture Network Functions Virtualization

n What does Mobile Core Network virtualization really mean Core network as a software

n Mobile Core Network beyond EPC n Fraunhofer FOKUS OpenEPC Testbed Realization n Summary and Conclusions

Fraunhofer FOKUS Competence Center NGNI

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What is Network Functions Virtualization (NFV)

n Network Functions Virtualization (NFV) is a novel paradigm that presumes that the network functions: Are implemented only as

software (programs) Can run on top of common

se