ngn architecture-iete
Post on 02-Apr-2015
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Next Generation NetworksAn Overview
Each service has its own network◦ Multiplied operational costs
Each network managed separately◦ No service interaction
Multiple customer profiles
Today
Private Data
Internet
OSS OSS OSS OSS OSS
Mobile
NB Voice
WAN
Customer
Video
04/11/2023 3
Level-I TAXs at 21 locations (LDCAs) Level-II TAXs at 301 locations (LDCAs).
Total No. of LDCCs - 322 Tandem / Transit Switches at Big
Cities / SDCC locations (2325 locations)
Total No. of SDCCs 2647 Switches based on the principle of
Circuit Switching
Current Generation Network(CGN)-PSTN
04/11/2023 4
It has evolved over a period of last 100 years.
It is mainly optimized for “VOICE” 180 Second or 3 minute call and not for data.
It uses “circuit Switching” which is highly reliable.
What is Existing Network?
04/11/2023 5
Current Generation Network
PDH/SDH/DWDM Transmission Network
Level-I/II TAX, MSC (GSM/CDMA)
Local Exchanges, BSC & BTS
Customers Customers
Level-I/II TAX, MSC (GSM/CDMA)
Local Exchanges, BSC & BTS
04/11/2023 6
Reliability – 99.999%. This corresponds to 5 minutes down time per year and is known as five-nines reliability
Scalability - Capability Support Lakhs of customers.
Quality of Service :- High speech quality, no perceptible echoes, no noticeable delays, no annoying noises.
Voice Telephony
04/11/2023 7
Having MSCs, BSCs, BTSs etc◦About 50,000 BTSs (Approx.)◦About 2450 BSCs (Approx.)◦About 900 MSCs ◦Packet core network consisting of SGSN
and GGSN ◦The connectivity with
Mobile- At MSC Level only PSTN- At TAX level / LE Level
MOBILE NETWORK
04/11/2023 8
Having NIB nodes at circle/SSA/SDCA level
Each node is connected to 2 or more node for backhaul at peer or higher level.
Very difficult to maintain (Very costly) high uptime.
Connectivity at local exchange level
DATA NETWORK
04/11/2023 9
Fixed line usage is reducing dramatically for “classical” services
Mobile use is increasing steadily even though penetration is already high.
Broadband Internet deployment shows a rapid growth trend.
As per a statistical result IP traffic increases 10 fold every year while voice traffic is relatively flat.
Changing Telecoms Trends
Broadband
Mobile
Fixed
04/11/2023 10
Slow to develop new features and capabilities.
Expensive upgrades
Proprietary vendor troubles
High OPEX.
Large power and cooling requirements.
Limited migration strategy to New tech.
Product/model obsolescence.
Problems of Existing network
04/11/2023 11
Operators Want
04/11/2023 12
Vendors Want
04/11/2023 13
Customers Want
04/11/2023 14
BILLS
MOST IMPORTANT
CUSTOMER WANTS
ONE BILL
04/11/2023 15
In other words CONVERGENCE is the need of the hour.
04/11/2023 16
This Convergence gives birth to
NGN(NEXT GENERATION NETWORKS)
04/11/2023 17
Next generation networks
Gateways
Internet
Wireless TelephoneSystem
Workstation
IntegratedServices Over IP
Workstation
Evolving towards IP Communications
Next Generation Networks (NGN)Present Day Networks
04/11/2023 18
Each service has its own network◦ Multiplied operational costs
Each network managed separately◦ No service interaction
Multiple customer profiles
Seamless service linkage◦ All services over any access
One network for any service◦ Unified management structure
Single customer profile
NGN Concept
Today New Service Network
Private Data
Internet Deep Access
Services EdgeMulti-service Aggregation
MPLS Core
OSS OSS OSS OSS OSS OSS
Mobile
NB Voice
WAN
Customer Customer
Migrate
Video
PSTN model Vs NGN model
Voice Network
IPNetwork
VideoNetwork
StorageNetwork
IPNetwork (for Voice, Data & Video)
• Dedicated Network per service
• Large Invest
• Multiple technologies / Knowledge
• Convergence technologies
• Cost reduction
• One Protocol, one Knowledge
Voice Data Video Storage voice Data Video Storage
One network for everything
Today Tomorrow
Telephonenetwork
Mobile radionetwork
IP-Network
Multimedia Access - Advantages:• easy to handle• reliable• mobile
Internet
Transition to NGN:
04/11/2023 21
NGN – a layered architecture Brings intelligence in every layer
Application Layer
ControlBearer
Service Control Layer Softswitch
ControlIP ServiceSwitching
ApplicationServices
TransportLayer
PSTN
Internet
MultiservicePacket Switching
XX X XX
CORE NETWORKS
XNational Optical
BroadbandAccess
GbEGbE
DSLAMDSLAM
ACCESSNETWORK
RASRAS
Frame/ATM
Frame/ATM
WirelessWireless
CPECPE
Media Gateways
Metro Optical
X
XX
X
04/11/2023 22
One infrastructure is required. One backbone for voice and data services
instead of two parallel ones. No maintenance of proprietary switching
systems. Fewer call controlling entities in the
network so less capital and operating cost. Easier configuration of equipment. Fast advanced and new services
deployment is possible.
Advantages of NGN
04/11/2023 23
A BIG Change in Mindset
BEFORE AFTER
20,000 Port Switch
04/11/2023 24
Legacy vs Next Generation
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Floor Space Hardware Software
SoftSwitch
4%
35%
67%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Floor Space Hardware Software
SoftSwitch
% of Traditional CAPEX for NGN
04/11/2023 25
Legacy vs Next Generation
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
MTTR Maintenance Operations Provisioning Training
SoftSwitch
64%
34%
75%67% 70%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
MTTR Maintenance Operations Provisioning Training
SoftSwitch
% of Traditional OPEX for NGN
Benefits of the NGN
New revenue opportunities for service providers and operators from IP based services.
Flexibility which supports the development of highly programmable telephony equipment.
Getting to market quickly with new and attractive services (Small gestation period) .
Reduced CAPEX & OPEX for NEW Network Services
Scalable to fit Deployment of Any size.
Benefits of the NGN (Cont..)o Enhanced customer services that it reduces
“time to market”.
o Easy integration of dissimilar networks and
network components.
o Lower cost and Flexibility in development,
deployment & ownership.
o Ready Infrastructure for New Application and
Services.
NGN constraints
New Knowledge acquisition for incumbent.
Integration into existing large Infrastructure.
Multiple components interactions
Market Time evolution.
New Service Opportunities
Voice ServicesHigh-Speed Internet AccessCorporate VPNs“Friends & Family” VPNsVideo and Audio EntertainmentInteractive GamingPersonal Video ConferencingRemote MonitoringOn-Demand Storage Services
Distance LearningHealth CareFinancial ServicesUnified MessagingMobility Services (Cell, PDA, Paging)Derived Voice Lines (VoDSL, VoIP)Security, Disaster RecoveryWi-Fi Integration Services
04/11/2023 30
In NGN era there is a talk about EOIP which means Everything over IP. That means you can provide any service through NGN platform based on IP.
04/11/2023 31
The value proposition of NGN
TDM-Technology
NGN IP-Technology
Time
Re
ve
nu
es
pe
r L
ine
Revenue-generating
Applications
Innovative applications throughcommon IP denominator
Internet volumes and technologicaladvancements reduce IP costs
Demand-oriented
Infrastructure
Time
TDM-Technology
NGN IP-Technology
Co
sts
pe
r c
on
ne
cti
on
Reduced number of managed nodes & self-routed IP backbone
Self-managing
Networks
NGN IP-Technology
TDM-Technology
Network size
OP
EX
pe
r li
ne
Applications Of Next Generation Network
April 11, 2023 34
The objective now is …
Verticals broken into horizontals and integrated together in horizontal strata. One common IP based implementation !!!
Single Packet Bearer
Network for all services
April 11, 2023 35
NGN is apacket based network which is able to
provide multimedia telecom services
able to make use of multiple broadband access technologies
QoS enabled transport technologies, and
in which service related functions are independent from underlying transport related technologies.
NGN :Definition (As per ITU)
A NGN is a packet-based network able to provide telecommunication
services and able to make use of multiple broadband, QoS-enabled
transport technologies and in which service-related functions are
independent from underlying transport-related technologies.
It offers unrestricted access by users to different service providers.
It supports generalized mobility which will allow consistent and
ubiquitous provision of services to users.
Definitionof NGN(DraftRec.Y.2001)
Target Standards Area
Generalized Mobility Convergence btw. Fixed & Mobile
Unrestricted Access Open Access Interface
Separation Services with Transport Architecture and Open API
QoS-enabled Transport
Multiple-BroadbandManageable Broadband
Definition & Features of NGN
Next Generation Networks Packet-based network (Generally IP)
Interworking with legacy networks via open interfaces
Unrestricted access by users to ◦ different services and/or
◦ service providers with strict end to end QoS
Independence of service-related functions from underlying transport technologies.
Next Generation Networks (Cont…) Layered architecture with
functional planes separated by open interfaces enabling third party services and applications.
Multi service network
Multiple parallel sessions from same user for various services
Generalized mobility (User/Terminal/Access)
External drivers and internal motivation put pressure on operators’ NGN deployments.
Develop new services easier and faster
Enhance flexibility Reduce operational
expenditures Replace of old platforms at
their end of lifecycle
Massive growth of data traffic
Flat growth of voice market Massive access competition Maturity of IP technology Open standards and
architectures
Deployment of Next Generation Network
Operators’ MotivationDrivers
04/11/2023 40
TDM versus IP
Subscriber in one BTS talking
to subscriber in another BTS
MSC
MSC
BTS
BTS
TDM NETWORK
04/11/2023 41
TDM versus IP
SOFTSWITCH
BTS
BTS
Signaling
IP NETWORKVoice Payload
Subscriber in one BTS talking
to subscriber in another BTS
04/11/2023 42
TDM versus IP
MSC
MSC
BTS
BTS
TDM
Roam
ing
Subscriber in one BTS roams into other subscriber’s BTS
04/11/2023 43
TDM versus IP
SOFTSWITCH
BTS
BTS
Signaling
IP
Voice Payload
Roam
ing
Subscriber in one BTS roams into other subscriber’s BTS
04/11/2023 44
NGN Principles : Technology Evolution Towards NGN
-> Separation of layers
April 11, 2023 45
NGN Architecture
Managem
en
t
Control
Service
Media
Access and Transport
April 11, 2023 46
Access Layer: Combines all the access technologies like POTS, ISDN, GSM/UMTS, HFC, LMDS, ADSL etc.
Transport Layer: The backbone network and the techniques for transport. It is IP backbone.
Media Layer: used to adapt the data originating from various technologies to the backbone networks. The equipment is called Media Gateways (MGW)
NGN Architecture
April 11, 2023 47
Control Layer: This layer controls call handling. It comprises of the equipment that manages signaling (SGW) and call handling (Media Gateway Controller).
MGC is also called SOFTSWITCH or Call Server or Call Agent.
Service Layer: This layer comprises of the equipment that centralizes the service logic and data. It is also called as Application Server or Media Server.
Management Layer: It spans over all the other layers and it comprises of all the management equipment.
NGN Architecture
NGN Components
Media Gateway Controller (MGC)
Media Gateway (MG)
Signaling Gateway (SG)
Softswitch
Application/Feature Server
Protocols
April 11, 2023 49
NGN: Soft Switch Architecture
SOFTSWITCH
App. Server
MediaServer
SS7 ISDN
SignalingGateway
MediaGatewayTrunkingGateway
AccessGatewayAccessGateway
IP End Points
HomeGateway
SOFTSWITCH
IP End Points
EnterpriseGatewaySIP
SIP SignalingServer
Management,OSS, BSS,Billing
SIPSIP(T)/SIP(I)SigtranMGCP/H.248AAA, etc.
Core Network
Other Provider’sCore Network
Network Gateway
Wireless Technology Comparison
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