Transcript Presentation 1

Objectives and
Introduction to NGN Issues
John Horrocks
+44 1483 797807
[email protected]
Objectives
• Explore technical, operational and
commercial issues - overlaps
• Numbering, interconnection, quality
• Backbone and transit options
• Migration and roll-out of new services
• Retail and interconnection charging
models
A structured workshop
2
The changed market
• Common network technology - IP
• Diverse access technologies - xDSL, WiFi,
WiMax, 3GPP, CDMA, self managing radio
• New management concepts - user provided
services, self configuring networks
• Liberalisation - anyone can do almost
anything
• Network competition - telcos vs Internet
Market is out of “control”
NGN is subject to “uncontrolled” market forces
Users have real diverse choices
3
Changes in the telco market
• Retail
– Calls included in subscriptions
– Death of distance - distance has
disappeared from many national tariffs
• Interconnection
– Nearly all call based
– Nearly all time and distance based
– Strong distance element
Does the approach to interconnection need to be
revised to keep in step with the retail market?
4
BT Interconnection rates
•
•
•
•
•
Local exchange:
Single transit:
Double transit <100 km:
Double transit 100-200 km:
Double transit >200 km:
0.2514 ppm
0.3555 ppm
0.6055 ppm
0.7792 ppm
1.0190 ppm
Distance factor of 4:1?
5
The effect of real competition
• Innovation is accelerating, eg Voice
over Internet, public WiFi, xDSL, TV
over telephone wires
• Growing pressure on excessive prices
• Usage based charges are disappearing
• Battle between telco complexity and
Internet simplicity
6
Critical issues for NGN
• Copy past telco models and practices or develop
new simpler ones? - Who is studying new simpler
models?
• What will be the new services that will justify new
investment?
• What will users pay for that is not available more
cheaply on the Internet? - quality? security?
• Who will be the leaders? Incumbents? Will
regulation, eg interconnection structures, be a
barrier to development?
7
Migration paths - replacement
Analogue/ISDN UNIs
IP-based UNIs
PSTN
PSTN on IP Core
Circuit switched core
IP core
New services on IP Core
NGN
Other
?
Voice over Internet
Telephony over xDSL
TV over xDSL
“Plain old Internet”
Home Gateway
8
Migration paths - overlay
Analogue/ISDN UNIs
IP-based UNIs
PSTN
PSTN on IP Core
Circuit switched core
IP core overlay
IP core
New services on IP Core
NGN
Other
?
Voice over Internet
Telephony over xDSL
TV over xDSL
“Plain old Internet”
Home Gateway
9
Emulation and Simulation
PSTN
Emulation
Meaning
Core
network
NNI
UNI
PSTN on
IP core
IMS or
non-IMS
SIP-I/T
SIP-IMS
Analogue/
ISDN
IMS
SIP-IMS
IP-based
IMS
SIP-IMS
IP-based
PSTN
PSTN
Simulation compatible
New
services
N/a
10
Replacement and protocols
Analogue/ISDN UNIs
IP-based UNIs
PSTN
Circuit switched core
Emulation
IP non-IMS core
?
IMS or non-IMS core ???
New services on IP Core
IMS core
…and which protocol at interconnection points (SIP-I/T or SIP-IMS)?
…how many stages of migration (2 or 3)?
11
What new services?
• With terminal liberalisation, networks
only provide packet pipes - should
packet pipes be standardised to make
interconnection easy?
• The focus on service capabilities is
drawing attention away from the need to
develop new services with terminals
12
NGN and Internet - which model?
This
Internet
LAN
NGN
Internet
Or that?
LAN
NGN
NGN
13
Subscriber LANs and services
Now
LAN
ISP
LAN
ISP
Then?
IP-Tunnels
IP-PBX
Separate ATM access SVCs if same physical access?
NGN
IP-UNI
Will NGN traffic classes be separated on different ATM access SVCs
14
Dimensioning NGN
• What traffic will it carry ?
–
–
–
–
–
–
Telephony 
Video-telephony 
TV and radio delivery ?
Email ?
Web browsing ?
Internet access traffic ?
• Why put any non-delay sensitive traffic on NGN?
15