the impact of volte on bss

1w w w . o p e n e t . c o m© Copyright 2013 Openet

LTE Voice SummitThe Impact of VoLTE on BSS

Dr. Bart Lehane

Openet


Overview

Why? When? How?


• Voice is still growing

• ~10% increase over the past four years

• Source: Commission for Communications Regulation – Irish Communications Market Quarterly Key Data Report, 11 Sept 2014

Do we need VoLTE? Is there a Demand?


VoLTE Subscriber Impacts

Better Call Quality Rapid Call Setup Time

Lower power consumption

Interactive Services VoLTE ≠ HD Voice

LTE networks support

QoS scheduling that ensures that voice packets are being

transmitted with tightly controlled latency and jitter

Calls can be setup in

a fraction of the time using VoLTE, again improving the overall

voice calling experience.

LTE technology

enables the phone to dramatically reduce power consumption

during inactive periods reducing power consumption

40% vs. 3G

Messaging, video

and interactive services can all be used at the same

time. For operators, these services are built on the same

VoLTE infrastructure

VoLTE will not form

part of customer messaging. Operators are using

HD & Clear Voice branding to message this to their

subscribers


VoLTE Launch Material


VoLTE Operator Benefits & Context

InnovativeNetwork Image

CS voice calls spectrally inefficient

Single Packet Switched Network

Network Modification e.g. Replacing 1st Gen

PCRF for VoLTE

Catalyst for Change in Charging

Systems

HD Voice is

increasingly used to differentiate voice providers and

demonstrate quality of a network

Providing data

services on one network and voice services on older

circuit switched networks, may not make best use of

scarce resources

A single network that

can deliver all services was one of the key requirements

when 3GPP were defining LTE and remains a

requirement today

A survey by Heavy

Reading of operators (2014) indicated that less than 30% could

use their existingPCRF to handle VoLTE

IN systems are

struggling to deliver flexibility and have high cost. New

services such as VoLTE are causing network operators to

evaluate existing charging systems

30%


VoLTE Operator Roadmap

• Improve voice quality• Shorten call setup time• Improve innovation image• Platform for competing with

OTT

• Build new services on existing VoLTE architecture

• Video Calling, Advanced Messaging, Advanced Voice Services

• Reduce CS dependency

• Remove CS Network infrastructure

• Reuse old Voice/SMS Spectrum for data services

Short Term Medium Term Long Term


Overview

Why? When? How?


11Live VoLTE Networks

Source: GSA Report September 19 2014

HD Voice and VoLTE Deployments


LTE to VoLTE Timelines11 - 2010 06 - 2011 12 - 2011 07 - 2012 01 - 2013 08 - 2013 03 - 2014 09 - 2014

Verizon

NTT Docomo

SK Telecom

LG U+

AT&T Mobility

Singtel

KT

HKT-PCCW

3 HK

Starhub

T-Mobile

Time from LTE launch to VoLTE launch

Average length of time is 24.6 Months


LTE to VoLTE Timelines11 - 2010 06 - 2011 12 - 2011 07 - 2012 01 - 2013 08 - 2013 03 - 2014 09 - 2014

Verizon

NTT Docomo

SK Telecom

LG U+

AT&T Mobility

Singtel

KT

HKT-PCCW

3 HK

Starhub

T-Mobile

Time from LTE launch to VoLTE launch

Correlation in each market


Plans to Deploy Policy Use Cases

• Question: Which of the following use cases will your company deploy in its network?

• Source: Heavy Reading


Overview

Why? When? How?


VoLTE and BSS Systems

• VoLTE requires co-ordination across policy & charging control elements

• Policy system (PCRF) on the call path and defines dedicated voice QoS

• Dynamically manage resources for each VoLTE call

• Flexible charging to zero rate VoLTE control traffic, support legacy voice tariffs and new flexible bundled propositions.


Scalability

0

100,000

200,000

300,000

400,000

500,000

600,000

700,000

800,000

900,000

1,000,000

1 2 3 4 5 6 7 8 9 10

Subscribers and Sessions

Num Subscribers IP-CAN Sessions

• Sessions and signalling will increase in-line with the number of subscribers

• Slow initial adoption will lead to rapid growth following typical growth curve

• Large increase in sessions and signalling

Can you handle > 1M TPS?


Emergency

Resiliency

Severity of Failure


• VoLTE systems must allow rapid detection of failures

• If there is an issue with calls, you need to know why. Fast.

Reporting and Accountability


• VoLTE systems should be simple to deploy and manage

• Scaling must be straightforward

• Delivery and charging for VoLTE services

• Fixed, simple to manage

• NFV approach enables simplified management, deployment and scaling

• VNF-Manager combined with VNFs for BSS systems

Ease of deployment and management


Functionality


• VoLTE represents an opportunity to change inadequate systems

• Given the requirements of VoLTE, existing systems may not be adequate

• Reliability, scalability etc.

• Functionality

• Licensing/contractual terms

Catalyst for Change

Heavy Reading 2014 operator survey

• VoLTE charging is Diameter based

• Upgrade an existing system, or use this as an opportunity to deploy a new charging system

• NFV and Virtualization can be utilised in order to simplify this migration


• Voice and data – both are now data centric

• Data calls priced as voice (e.g. zero rate data traffic, rate as voice call)

• Different interfaces required

• Can IN systems deliver flexibility required?

VoLTE – The beginning of the end for traditional billing and IN charging systems?


Adjunct Systems


VoLTE presents an opportunity for mobile networks to deliver a premium product but it must be executed correctly

Thank You

[email protected]

http://www.openet.com/ltevoice

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