Bradband World Forum 2011

The Impact of IPTV on the

Telecommunications Network and

the Consequences

BH Telecom, Bosnia & Herzegovina

EDVIN ŠKALJO

skaljo@bhtelecom.ba, skaljo@hotmail.com

Agenda

• Telecommunication network;

• Impact of IPTV at:

• backbone,

• access and,

• home network;

• GPON and OTT;

• Conclusion.

Telecommunication network

Backbone (Core)

DSLAM

CPE

STB TV

ISP1

Iptv

VoIP

ISP1

Definition:

• A telecommunications network is a collection of terminals, links and

nodes which connect together to enable telecommunication between users

of the terminals.

• New topics, as QoS and QoE, are included;

• Telecommunication network is mean for providing services to the end

users.

• The border between network and user is missed:

Aggregation or Metro

AccessService User area

DSLAM

Control, managment,

biling..

Control, managment, biling +

Managing of QoE

Definition of

the network

has changed

over time

IPTV• Internet Protocol television (IPTV)

IPTV is defined as multimedia services such as television/ video/ audio/

text/ graphics/ data delivered over IP based networks managed to

provide the required level of quality of service and experience, security,

interactivity and reliability. (ITU - 2009)

QoS and QoE are

included in

definition of IPTV.

IPTV is servis

which request a

large bandwidth,

QoS and QoE

IPTV and backbone

Backbone network before IPTV was characterized by:

1. Completely based on the optics as means of transport

2. Parallel networks for data and TDM traffic.

• The usage of optical cable:

o in TDM communication has resolved the problem of bandwidth

and QoS, however

o in data communication the optics by itself is not enough, it is

also necessary for other mechanisams to be present.

• There are many instruments for implementation of QoS,

however chronologically looking the most important are:

o Overprovision with best effort;

o Prioritization;

o Differentiation of services;

Strictly looked,

Overprovision

with best effort is

not instrument for

QoS

QoS in backobone

• Over-provisioning with best effort;

• This method is simple jet inexpensive method, but only for

networks with a load that is not close to a maximum.

• When load is close to or over the maximum this is not useful.

• Prioritization of traffic;

• Is very useful and inexpensive instrument for QoS, and it

gives good results for traffic of highest priority;

• The problems that can occur on services with higher priority

can affect lower priority services with sometimes fatal

consequences.

• Profit from low rate service can be greater than high rated

service

• Usually, average revenue for basic internet services is two

times grater than for basic TV services;

bandw

idth

bandw

idth

Max Bw.

Max Bw.

Some reaserchese

indicate that close to

a maximu means

over 60 %

The dilemma is: what to put

as P=highest, VoIP or IPTV

or Internet? Commonly

used configurations are:

VoIP – High; IPTV – close

to High; Internet – lowest or

close to lowest.

Q: Why would the internet be low priority when its contribution

to the revenue is the highest?

A: Because IPTV does not work properly if it is a low priority.

QoS in backbone cont.

• Next step in QoS: differentiation of service;o Each service gets its resource;

o Advantage: one service does not have an impact at rest of the

services;

o Disadvantage: relatively expensive solution;

o One services can have a free resource while another one can have

overloading.

• Combination of these three mechanisms can improve

efficiency and reduce cost.

bandw

idth

The part of the revenue

from IPTV is shared with

content owners (rights),

then the difference is even

smaller.

There are some examples of

mechanizms for Qos:

• 802.1.p;

• 802.1.p and q;

• IntServ;

• DiffServ.

Backbone network after implementation of IPTV

service Core

Aggregation or Metro

DSLAM

Distribution network

CPE

QoS is finished Diff Serv, ATM, 802.1p ..

STB TV

ISP1

Iptv

VoIP

ISP1

User network

There are two consequences of introducing IPTV in

the network:

1.time of parallel networks in backbone is finished, TDM network as

one of most reliable network goes to history;

2.network is ready not only for triple play services, it also ready for

multiservice where number and type of services can be almost

limitless;

IPTV sevis moved

bckbone network

to realy NG

Network

IPTV and Access netvork

• Stage 1: Access network before broadband (PSTN),

o This type of network is based on copper twisted pair

o The maximum length of subscriber loop is up to 3.6 (with drop cable it can be up to 4 km)

with diameter of 0.4 of copper pair, larger diameter gives a greater length of the subscriber

loop.;

• Stage 2: FTTN (or C, Cab,..), transition stage,

o The length of the loop is reduced by introduction a fiber optic cable from CO to the N,

o In this type of network typical length of loop is from 300 m up to 1,5 km,

o this stage is completed in WEE, while it is close to completion in CEE countries.

• Stage 3: FTTH(B), NGA – New Generation Access,

o The goal of all access networks

o It is an access network with QoS; NG Network will not be completed before then networks

migrate to this stage

Access network can be constructed in one of three stages

Spatial distribution of population in therms of ADSL2+

CO

Up to

3,6 – 4 km, 0.4 tp

20 M 10 M 4+ M

Stage 1. Access network before broadband

In the case of uniform distribution, then witin a radius of:

o 2.72 km lives around 50% of population,

o 1.65 km lives around 20% of population;

What does it mean for ADSL2+ users?

o connection up to 4 Mbps – 100% ,

o connection up to 10 Mbps – 50%,

o connection up to 20 Mbps – 20%.

20% - 20 M

50% - 10 M

100% - 4 M

Stage 2. FTTC, cab

• All users can obtain bandwidth grater then 20 Mbps.

Stage 3. FTTH/B - NGA

• Do we need FTTH? Why? How to get a good ROI?

Assume – uniform distribution of

population and ideal Cu pair

Cab

Up to 1,5 km

ADSL2+ is cheap,

widespread and uses

existing infrastructure (Cu)

* according NTCA Internet Broadband Survey Report (2007)

Some researches indicate that the decrease of max DSL speed

can go up to 50%. In the worst case (50% decrease), information

from previous slide will look like:

•Voice services,

o Stage 1: 100 %

o Stage 2: 100 %

•Internet connection up to 4 Mbps,

o stage 1: 75 – 80 %, (100% - up to 1 Mbps)

o stage 2: 100 %

(average for stage 1 and 2 is 88 – 90%);

•IPTV service based on SDTV :

o stage 1: 55 – 60 %,

o stage 2: 100 (90)%, many operators reported that this

vale is 90%;

(average for stage 1 and 2 is 77 – 80 %);

•IPTV based on HDTV:

o stage 1: 37 -40 % (unsure),

o stage 2: 90%, (average for stage 1 and 2 is 65%)

Services in a realistic environment

Things that can impact

a download speed are

• Age of cable,

• The number of

neighboring DSL lines;

• Quality of

maintenance;

• Atmospheric

conditions;

• Parallels and

•Other.

Calculation of ROI

From AN stage 1;

• Voice: 0%;

• HSI : up to 25%;

• SDTV: up to 45 %;

• HDTV: up to 63 %.

Countries (companies) that have a large share of AN in Stage 3 can easier make a sucesful

busines case than if thax networks is in tage 2;

Confirmation of this view are reports about successful business cases from Lithuania,

Russia, Turkey, .. Countries where there is still a large share of AN St1.

IPTV is not enough as drivers for AN St 3. (FTTH/B), especially for countries

(Companies) with access networks in stage 2.

Additional drivers and a new approach are required.

From AN stage 2:

• Voice: 0%;

• HSI : 0%;

• SDTV: up to 10 %;

• HDTV: up to 10 %.

Dificult to make a good ROI – cosenquence.

• There are two main consequences:

1. Passive Optical Network (in combinantion with FTTB for large

buildings);

2. New video technologies: Web TV, Internet TV or Internet Video

or Over-the-Top (OTT).

• PON

Past few years, the discussion for and against the PON network was

conducted. We are witnesses of two facts: FTTH (as main represent

of Access network in 3 stage) coming slowly (too slowly) and all a big

player (telecoms) chosen PON.

• New video technologies (OTT)

Possibilities of adopting quality of signal to really network

environment, is the best example how it is possible to get a good QoE

instead QoS.

Investing in the terminal for the new video technologies can be in the

ranking of investment in access lines in phase 3;

Investment in PON

and OTT is similar,

In case of PON it do

network operator;

In case of OTT it do

user alone

OTT can be used in

another aplication

In this moment it

is GPON

Home network

• Home (home network) before IPTV

o Almost each home had cable TV;

o Twisted copper pair was installed inside of user home;

o ADSL modem (close to PC)

o Wireless IEEE 802. 11.b.

• Today, new topics are actual:

o Video over UTP cable;

o Control and Ethernet over HDMI cable (HDMI 1.4);

o WLAN 802.11 n, where a distance is doubled and maximum speed;

o fiber optical cable in home networking: POF, MM or SM.

o Connected home;

Conclusion

• IPTV has improved features of the backbone network;

Time of parallel networks is finished;

TDM network is going to History;

• IPTV is insufficient for an acceptable ROI for Access network Stage 3;

PON and new video tehnologies found your places in access network

and user area;

• Home networking is emerging as a next big challenge;

Thank you for your attention