Next Generation Network NGN Standardisation, Technology, Issues

1
Next Generation Network (NGN)Standardisation,
Technology, Issues
Parthasarathy Ganesh Rapporteur Expert Group on
Network Service Management for IP World
2
Contents

• Motivating factors
• Architecture
• Technology
• Standards
• Issues

3
Objective

• To build future telecom network
• Scalable
• Smooth migration to single network
• Implementation based on standards
• Capability to introduce IP based services

4
NGN architecture
server
server
Core packet network
AT
MG
MG
Multi service
mobile
telephone
5
Benefits of NGN

• Bandwidth Savings
• Reduced Power Consumption costs
• Reduced Operational Costs
• Reduced Spares and Repair Costs
• Reduced Accommodation Costs
• Capability to provide non voice services
• Trunk Optimisation

6
Bandwidth Savings

• Bandwidth Savings due to Packet Transport

• TDM vs NGN Bandwidth requirement 41

7
Reduced Power Consumption costs
TDM vs NGN Power consumption ratio 31
DC Power consumption
8
Reduced Spares and Repair Costs

• Due to less number of cards and fewer types of
  cards

TDM Transit SW(OCB 283) Types of Cards 36
Number of Card failures/year in a 10 KC OCB
sw (Typical figure) 10 VOIP Equipment
Types of Cards 7 Card Failures/year Expected
to be less than half
compared to TDM
9
Reduced Accommodation Costs
Due to less floor space required
Floor Space Requirement 10K TDM Transit SW (OCB
283) 5m x 11m 55
sq.m. 32PCM(1KC) VOIP Equipment
0.7m x 0.7m x 2 1 sq.m.
10
Capability to provide non-voice services

• Spare Backbone Capacity can be used to provide
  leased bandwidth and VPN services

11
Trunk Optimisation

• Possibility of future Trunk Optimisation by
  combining a number of routes from secondary
  transit SW and connecting to the nearest media
  Gateway
• Dynamic trunking
• Demand based utilisation unlike preassigned
  utilisation in TDM

12
TDM

Packet nw
Traffic
13
Cost savings

• Less no of nodes

Core
20
4
Concentration
350

• Terminations
• TDM 2 mbps terminations
• IP STM-1 terminations

14
Architecture
MGC
BS
NMS
LE
ATM/IP network
LOCAL / TANDEM XGE
MEDIA GATEWAY
LOCAL / TANDEM XGE
LOCAL / TANDEM XGE

15
Technology in the core packet network
ATM/IP
16
ATM

• Key driving forces
• Unique flexibility,scalability,resilience
• Support of diff service classes enabling voice,
• data integration into one network
• Successfully field proven for delivering
  real-time
• applications such as voice and video
• Only technique providing high speed sw with QoS

17

• IP
• Today mainly used for data
• New architectures are under standardisation
• to support voice
• QoS is a key issue for providing
• a carrier-class telephony service

18
Multi Protocol Label Switching (MPLS)

• Convergence of connection oriented forwarding
• techniques internets routing protocols
• Has ability to emulate high speed tunnels
• Why MPLS?
• Ultra fast forwarding
• IP traffic engineering
• VPN provision
• Voice/video on IP

19
MPLS

• Results in IP switched paths called
• Label Switched Paths (LSP)
• Data is forwarded along LSP
• by means of label swapping
• Original IP header fields are
• swapped transparently

20
How MPLS work ?

• MPLS network consist of
• Label Edge Routers (LER) Label Switching
  Router (LSR)
• LER analyse IP header to decide LSP
• LER add corresponding local LSP identifier
• in the form of a label
• Other nodes forward the packet along LSP
• identified by the label
• Forwarding in the nodes simplified by the label

21
MPLS( Multi Protocol Label Switching)
22
MGC
SS7 Network
MGC
SS7 Network
H248/Megaco
H248/Megaco
Circuit Switch
Circuit Switch
ATM/IP Network
Home
Enterprise
Trunking Gateway
Trunking Gateway
MGC Media Gateway Controller
23
STATUS OF STANDARDIZATION
24
Technology issues

• For public network
• Whether ATM or IP today !
• Whether H323 or H248 !
• MPLS for voice !

25
ATM or IP !

• ATM path is it preferred if
• - No ATM network in place to exploit its
  potential ?
• Instead of establishing a new ATM network is it
• preferred option to build network based on IP
  ?
• With IP in focus for future network architecture
• IP approach is it the strategy ?
• Interconnection/interoperability between two IP
  nw
• is much easier than between IP ATM !!
• QoS issues in IP implementation !!

26
ATM or IP !

• Why IP ?
• Standards compatibility evolution
• more towards IP
• IP is open standard architecture
• Applications are IP based
• Strong support from internet
• Both telecom IT vendors focussing on IP

27
IP backbone

• Router based interconnected mesh network
• Features
• Scalable
• Open architecture
• Easier Implementation of IP based software
• Interoperable
• Easily adaptable standards
• Smooth interconnection in future between
• internet segment managed segment

28
H323 or H248

• H323 is standardised products available
• Considered to be enterprise network solution
• Not suitable to handle public network traffic
• H248 is presently considered as the most
  preferred solution
• Standards are available products are emerging
• BICC is standardised products under development
• MPLS for data standardised, for voice under
  process

29
Thank you