International Telecommunication Union Workshop on Next Generation Networks: What, When & How? Geneva, 9-10 July 2003 NGN Drivers: NGN Drivers: Acces Acces s and s and core core Networks, Networks, legacy legacy services migration services migration issues; issues; Dr. Sathya Rao Telscom Consulting [email protected]
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NGN Drivers: Acces s and core Networks, legacy services migration issues;
NGN Drivers: Acces s and core Networks, legacy services migration issues;. Dr. Sathya Rao Telscom Consulting [email protected]. An initiative to develop the NGN Roadmap. The Network Evolution. New Generation Communications. Wireline. Full Services IP Internet. Gateways. Telephone - PowerPoint PPT Presentation
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International Telecommunication Union
Workshop on Next Generation Networks: What, When & How?Geneva, 9-10 July 2003
169-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-T
Wireless Dream towards reality
o Deployment of WLAN in hot spot areas
• Big ISPs have invested in WLAN • Major vendor communities support: Cisco, Intel, Nokia..
o Wireless IP solutions have lots of momentum!• People desire wireless IP terminals and access devices
o WLAN offers a good mobile solution for indoor IP access
• Added value for the user - Flexibility, user mobility• Added value for ISP - solution for public high IP access
o WLAN standards are converging - IEEE 802.11b and IEEE802.11a
• Interoperability and roaming issues are being seriously worked out
179-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-T
3G & WLAN integration
3G/GPRSRAN
SGSN
BTS
WLANRAN
WLANAP
Access Router
Gateway"WLAN GGSN"
3G/"HLR"
GGSN
Internet
Multimode terminalwith 3G user identity
Summary of features:- Integrated authentication and billing- WLAN security and mobility with IP terms- AAA work is a must!!!
189-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-T
Optical Transport Network Architecture
199-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-T
NG Metro/Access Network Structure
BS
BS
BS
PS
VDSL
PassiveSplitter Access NetworkAccess Network
(D)WDM, IP/MPLS
(E)PON
FTTB
DSL
UMTSPico/Micro
Cells
UMTSMacro Cells
• Private customers and SOHOS
• High density housing estates with large dwelling houses
• Private customers and SOHOS
• Low density housing estates with small (single family) houses
FTTC
Point-to-Point Link
Metro NetworkMetro Network
DWDMIP/MPLS, MPS
10/40Gbps/ring / meshed
Global / WANGlobal / WAN10/40Gbps/
meshed
10Gbps/ downstreamup to 2.5 Gbps/ upstream ONT
ONT
BSONT
BSONT
10 Gigabit Ethernet
Public AreaWLAN (IEEE 802.11x) WLAN/UMTS RoamingWLAN/UMTS Roaming
Large business, Large business, EnterprisesEnterprises
CustomerCustomerPremisesPremises
209-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-T
Network Providers require:
- plan-able networks
- networks that are easy to manage
- to offer their resources to as many service providers as possible
- return on investment
- convergence (where realistic) in order to maximise efficiency and minimise costs
The Evolution of the Core and Access Networks
219-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-T
CPN: Trend towards high speed wireless (over a short distance)
Access: Trend towards GPRS/UMTS (high-speed ?)/ WLAN for “hot-spots”, xDSL, Cable, PON/FTTH/FTTC
Core: Optical (Trend towards higher DWDM)
Trends in Network Evolution
229-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-T
CPN: The ubiquity of IP applications has driven the biggest change ever seen in telecommunications networks
Access: An encapsulation of the IP packets is generally made in the access network. IP must be modified for wireless usage
Core: Core networks are essentially containers carrying bits. The overhead (time and loss of capacity) for encapsulation is insignificant
Trends in Network Evolution (network layer)
239-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-TProblems of Convergence
- Diversity of user requirements (mobility, high bandwidth, real- time response, security, low cost …)
- Diversity of service requirements. This leads to the fact that certain network topologies and protocols are more efficient than others.
-Diversity of network capabilities
- Market forces and proprietory solutions matching the requirements.
Efficient interoperability is key.Network layer (IP) convergence is the only visible solution
The Evolution of the Core and Access Networks
249-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-T
Strong trend towards the use of IP as the converged network protocol in the home, access network and backbone. A common protocol for conveying the data from the source to the destination brings (in theory) economies in terms of the network devices, management and maintenance.
The Evolution of the Core and Access Networks
259-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-T
Technology Development
Some of the key technologies for NGNs would have to include: - middleware and distributed systems (to enable Service Provider - Network Provider separation)
- IP: IPv6, broadband, QoS, security, mobile and wireless
- multi-domain network management (for seamless roaming and QoS support)
- seamless interworking between core and access networks
- micro and opto-electronics
- cross-media content
- multi-modal and adaptive interfaces
- multi-lingual dialogue mode
- embedded intelligence
269-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-T- facilities for (mobile) transitioning between networks owned by different providers mid-session (and the corresponding charging issue)
- QoS may be demanded from the network or, alternatively, accounted for by (adaptive) applications
- QoS parameters have to be agreed between Network Providers
- the same service used on a different terminal, or transmitted over a different access network, will require different QoS values
- QoS on IP has been a research topic for several years. The solution usually proposed in the literature is the use of Intserv in the access network and Diffserv or MPLS in the core. However, the deployment of Intserv is difficult, since existing Internet applications are not QoS aware and do not have signalling capability.
Technology Development
279-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-T
Simplified NGN Architecture
SOFTSWITCH
Transport Layer
Man
ag
emen
t
SS7 ISDN H.323 SIP MGCP
Call Control & MGC
Policy Based Routing
Features &Services
BillingInterface
AAAInterface
Control
QoSController
QoSRouting
PolicyInterpreter
NetworkDB
cNAPScNAPS
RTPForwarding
QoSMeasurement
Virtual ChannelsControl
SLAVerification
MediaGateways
MediaServers
IP End Points
Application Layer Operations & Business Support Systems
MEGACO
DB
SLAManagement
App. ServersInterface
289-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-T
Multi-Service Softswitch…delivering multiple services using a
Feature Rich Edge
299-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-T
NGN Features & Benefits
o Features• Multiple applications and media types• Enhanced connectivity, accessibility and
availability
o Benefits• Increase revenue opportunities through
new services and products• Significant Reduction of operational costs
309-10 July 2003 Workshop on Next Generation Networks: What, When & How?
ITU-T
NGN: Conclusions
o The NGN will deliver new ways of communicating that most can’t conceive of today
o The NGN is not about rate arbitrageo IP will rule from network core to the desktopo The value of the NGN grows exponentially in
relation to the number of applications it supportso The NGN is by nature globalo The NGN is the integration of communications
with IT and lifestyleo The transformation of the NGN is already