Wi-Fi Offload Tomorrow - Tech Mahindra Papers/Industries... · IFOM Tomorrow WLAN AP PGW ePDG/PDIF...

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Wi-Fi Offload – Yesterday, Today &

Tomorrow


Agenda

Challenges Faced by Service Providers

Evolution of Wi-Fi Offload

Carrier Wi-Fi – Trusted Wi-Fi Offload Over S2a GTP

TechM’s Mobile Data Offload Solution: SaMOG

Use Case Scenarios and Key Differentiators

Business Case Illustration

TechM IPRs

References


4 fold increase in 3G

devices and 1000M 4G

devices by 2017

Data Explosion

Target ROI yet to be realized

from 3G Investments

Transformation to 4G network

in progress

Increase 3G Data

Capacity (in terms of

eNodeB, RNC, SGSN,

GGSN, other network

elements and Spectrum)

Invest in 4G Infrastructure

Additional investment will

push ROI target points

further which may not be

tenable

Fresh CAPEX

investment in 4G and

scrapping 3G investment

without meeting targetted

ROI. Need of an

Alternative

Solution which:

Has No/Negligible CAPEX Delivers better QoE Brings Additional Revenue by offering

Wi-Fi Hotspot Services with Carrier

Wi-Fi Offload Solution

Global Mobile

Devices &

Connections

by 2G,3G&4G

Mobile Data

Traffic Estimates,

2012-17

Mobile Data Traffic Offload

Estimates, 2012-17

Challenges Faced by Service Providers


Wi-Fi Offload Vs Small Cells

Operates in unlicensed spectrum.

Infrastructure costs (chipsets cost, access

points, SaMOG boxes) are minimal

Operates in licensed spectrum.

Infrastructure costs, although lower compared

to installing a cell tower, is still substantial and

also require additional spectrum.

Wi-Fi Offload Small Cells

The TCO of building Wi-Fi networks is allegedly around a tenth of that of 3G/4G network equivalents.

Wi-Fi Offload required negligible investment from MNOs or service providers – compare this to the millions of dollars often required to purchase licensed bands.

Thus, the Wi-Fi and mobile industries are on convergent paths although it is likely to take a few years before the two technologies will be operating with end-to-end seamlessness.


Evolution of Wi-Fi Offload

ePDG,

TTG Yesterday

SaMOG Today

MAPCON,

IFOM Tomorrow

WLAN AP PGW

(possibly unsecure) WLAN AP & Backhaul a priori owned by any

provider

ePDG/PDIF

AAA

SWx

S2b: PMIP

HSS

IPSec: 3GPP/2 VPN

ISSUES in Yesterday’s Technology:

• IPSec/IKEv2 required on UE (Client had

to be downloaded)

• Battery drain effect on UE and intensive

CPU processing.

• IPSec overhead & associated packet

fragmentation on WLAN air interface

• Poor user experience with Latency

associated with tunnel establishment for

short-sessions (e.g. MMS access)

• Multiple tunnels one for each service

Yesterday’s 3GPP/2 standard for access to EPC over non trusted access

(secure) WLAN AP & Backhaul

AAA

SWx

S2a: GTP

Radius

802.11i

Single tunnel / AP

Today’s solution (fat-pipe model) that overcomes standard issues

PGW1

non-3GPP

access

3GPP

access

PGW2

PDN1

UE

PDN2

PGW1

non-3GPP

access

3GPP

access

PDN1

UE

PDN connection #1

PDN connection #2

flow #1

flow #2flow #3

PDN connection #1

Multi access PDN connectivity (MAPCON) IP flow mobility (IFOM)


Carrier Wi-Fi – Trusted Wi-Fi Offload Over S2a GTP

SWx

(Diameter)

3rd Party HSS

PGW / GGSN S2a

(GTP-C) GRE/IPSec

S2a

(GTP-U) Ta (Radius)

3G / LTE Network

SaMOG

Internet

Internet

AAA

3rd Party

AP/AC

Client

(UE)

S6b

802.11i

PCRF

Gx/Gy

SGi

Wi-Fi Network

ANDSF S14 1

2

3

4

5

7

6

1 Leveraging Improved WLAN Security (802.11i)

2 Policy Based Offloading

3 No IPSec Low Latency, No Overhead, No Fragmentation, Less Battery Consumption

4 Ability to offload to Internet Directly (Not through EPC Core)

5 Packet Core Anchor described in 3GPP R11

6 No need to support an ePDG or HA in the network

7 Seamless Mobility and NSWO


TechM’s Mobile Data Offload Gateway Solution (SaMOG) &

Partner Ecosystem

Access Point

L2oGRE

Ta (Radius)

SaMOG

802.11i

Client (UE)

WLC EAP

Offload SSID

ANDSF

S14

eNodeB SGW

MME HSS

S6a

PCRF

SGi

S2a

AAA STa

SWx

S5/S8

Local Breakout (NSWO)

PGW

Gx

S1-MME

S1

S11 4G Network

Wi-Fi Network

Internet

Propriety Ownership: TechM

Partner

Pre-integrated E2E Mobile Data Offload Solution


SaMOG – S/W Architecture & Specifications

( SaMOG Control Plane)

SaMOG - C APP

Radius

UDP

OAM

Agent

UP instance n

S aMOG - U APP

GRE

IP

OAM

manager

UP instance 1

UP instance 2

DHCP / Radius

L2oGRE

S2a

Ta

SaMOG User Plane

GTP - c

UDP

GTP - u

Radius DHCP

(SmartEMS)

Highly scalable solution with separate control & data plane

Interoperability tested with major UEs, APs, AAA & Policy

management

KEY SPECIFICATIONS

STANDARDS

COMPLIANCE

Trusted WLAN Access using

3GPP TS 23.402 (802.1x / EAP),

R11

AUTHENTICATION

PROTOCOLS

EAP-SIM, EAP-AKA, EAP-AKA‟

AAA 3GPP AAA (RADIUS, RADIUS to

DIAMETER) Proxy

INTERFACES

SUPPORTED

S2a – GTP Based interface to

PDN-GW

STa – Diameter based interface to

3GPP AAA Server

Ta - L2oGRE based interface to

Access Point / WLAN Controller

USER PLANE

ACCELERATION

Intel DPDK and NPU Based

Packet acceleration

HIGH AVAILABILITY 1:1, Hot/Standby for Control Plane

1:1 Warm Standby for User Plane

PLATFORMS

SUPPORTED

X86, POWER PC and MIPS

Processor Architectures

Linux

CAPACITY 16000 Access Points

Virtualized Software Only Solution

for elastic scaling

ELEMENT

MANAGEMENT

Integrated with TechM EMS

FCAPS


Migration from TTG/ePDG to SaMOG

3rd Party HSS

GGSN/PGW

3G / LTE Network

SaMOG

Internet

AAA

Client

(UE)

PCRF

TTG/ePDG

Wi-Fi

Network

IP-Sec 802.11i


SDN for Offload Solution

Decentralized data plane for independent scaling & User Experience

Integrated Core & Transport networks for Cost Reduction

OpenFlow integration in Access Points and WLC for e2e OF based control

WLAN Gateway Signaling Plane as an application on SDN Controller

Signaling Plane deployed as an SDN Application

Deployment of Forwarding Plane

on OF enabled OCP Commodity

Hardware

Service Chaining for features (like Charging) not

supported in OF Specifications

Cloud Based WLC and WLAN Gateway as SDN Applications

OF enabled thin Access Points

Integration of Cloud Based

WLC and WLAN Gateway

Applications

OF enhancements for metering &

DPI


Use Case Scenarios

Indoor Areas

• Most wireless data traffic

comes from indoor spaces

like offices, café, restaurants

• Offloading here can delay or

even avoid the need for

adding towers to high-density

service areas.

Outdoor Venues

• High Quality Data Services

for Subscribers

• Opportunity for incremental

revenue from ad-hoc users

• Will come at around 10% of

the cost of a new cell or cell-

on-wheels.

Large Area Hot Zones

• Transit corridors and large

urban downtown settings

challenge wireless

performance.

• Our solution leverages the

existing investments (like cell

sites).


Key Differentiators

Early adopter of the evolving 3GPP specifications

Early adopter of the evolving 3GPP specifications.

Highly scalable virtualized solution; Can be easily

scaled to support hundred thousands of

subscribers.

Future proof - SDN ready offload solution

Architecture to utilize multi-core processor

architectures

HW agnostic implementation that can be deployed

on any Carrier-Grade platform

Integrated EMS for FCAPS

Applications & Services from TechM – Leading SI

Experience in developing carrier grade products

for service provider networks

Dedicated practice for 3G/4G and Wi-Fi Testing

serving both equipment vendors and service

providers.

„One-Stop Shop‟ Offload Solution

A Best In Class solution with a partner eco-system

consisting of leaders in the ANDSF (Policy

Server), AAA and PCRF space


Business Case Illustration

Additional New

Customers

Greater Content

Consumption

Enhanced Customer

Experience Increased Revenues

Value for Service Providers

Cost Savings

Location Based Services

316 450

0

200 352

18

668 668

0

200

400

600

800

1000

1200

1400

1600

Cellular Wi-Fi Network

Revenue

Capex & Opex

Revenue Share

Profit

Seamless

Capacity

Augmentation

Offload solution serves as a

means of improving coverage

and yet provides seamless

data connectivity between

Cellular to Wi-Fi Network and

vice-versa

Cost

Efficiency

Wi-Fi Offload is a cost efficient

alternative to macro networks

in addressing the challenges

thrown by data explosion

without significant investments

in CapEx/Opex


TechM Intellectual Property Rights

TechM IP

eNodeB

Access Point

Client (UE) Applications

Offload SSID CE Access

Ethernet

Network

DC Fabric

MME

SGW PGW

SaMOG PCRF

SDN Applications

(LB, SFL, Analytics,..)

SDN Controller

Smart

NMS

x-CSCF

Femto

Gateway

eNodeB Simulator

EPC Simulator

Software Defined

Networking

Incubation center for

developing SDN

solutions to address

network challenges.

Provides next

generation flow-based

switching.

Carrier Ethernet

Low cost MPLS-TP

based Carrier Ethernet

solution for mobile

backhaul

Packet Core

(EPC + IMS)

Compact EPC solution

for niche markets like:

Femto Gateway solution

for LTE small cells

X-CSCF for VoLTE

deployments

Smart NMS

Customizable

Management Solution

for Multi-Vendor, Multi-

Technology & Software

Defined Networks

Integration with Next

Gen OSS


References

Whitepaper : Wi-Fi Offload – The Yesterday, Today and Tomorrow -

http://www.techmahindra.com/en-

US/wwd/industries/Pages/Telecom/Resource_Center/default.aspx

Product Engineering Solutions @ Tech Mahindra -

http://www.techmahindra.com/en-

US/wwd/industries/Pages/Telecom/Product_Engineering/Solution.aspx

Contact us - <[email protected]>

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