By By
Tilak De SilvaTilak De SilvaChief Global & Network Officer Chief Global & Network Officer
Sri Lanka Telecom Ltd.Sri Lanka Telecom Ltd.
Copper Wires Switch MUX Transmission Network
Copper Wires - Access Switch - Call control, Accounting (CDR) MUX - Aggregation Transmission Network - Transport
Access Aggregation Transport Authentication, Authorization, Accounting
Eg. Leased Line
Access – Copper, WiMAX Aggregation - Data Node Transport (TDM Transmission Network)
Access - ADSL Aggregation - DSLAM Transport - MPLS AAA
Access - ADSL Aggregation - DSLAM Transport - MPLS AAA
Multiple Platform based Vertical Network ArchitectureMultiple Platform based Vertical Network Architecture
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Services
TDM Tx Backbone
IP / MPLS Backbone
Metro Ethernet Network
PSTN / ISDN
TDM Data network
MSU/RSU/ELU
Data Node
IP-DSLAM
MEN Node
Other Operators
Different networks for different services … ? ? ?
Service wise Access, Aggregation & AAA
Separate staff for each service More Space & power
IP / MPLS Backbone
NGN MSAN
NGN architecture defined in ITU-T Rec. Y.2012
IMS Functional Architecture Model
Service Stratum◦ Application Support Function and Service Support
Function Gateway Authentication & Authorization
◦ Service Control Function Resource Control Registration Authentication & Authorization
Transport Stratum◦ Transport Control Function
IP connectivity services to NGN users Network Attachment Control Functions (NACF) Resource and Admission Control Functions (RACF)
To get desired QoS for communication To get permission to access certain resources
◦ Transport Function Core Transport Functions Access Transport Functions
Management Function◦ Manage the NGN network in order to provide NGN
services with the expected Quality, Security and Reliability.
ITU-T Rec. Y.2012ITU-T Rec. Y.2012
ISC ISC
MSU
TSCTSCTSC
MSU MSU MSU
CDMA/ PLMN
International Networks
RSU. . . . .
RSURSU ELU RSU
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MigrationMigration &&
LimitationsLimitations
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Why NGN…….. Why NGN……..
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Transport IP Network
PON NodeBWiMAX
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Transport & Access NetworksTransport & Access Networks
O/F
PONOLT
Only Copper to Home
Separate Fiberto BTS
(2/3G,WiMAX)
Separate Fiber to AGW
PON for both AGW & Node B
O/F
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Increasing mobilityOnly one contract /one billSeamless serviceshome zone billing
Subscriber
Acquisition of new subscribers by new servicesmainly with existing infrastructure / partlyshared infrastructure
Operator
MobileOperator
FMC is driven by increasing demand for mobility in all networks
Home locationin Mobilenetwork
FixedOperator
Mobility innetwork
OperatorFixed & Mobile services
Demand for New FMC features
Demand for New FMC features
Is concerned with the provision of network and service capabilities which are independent of the access technique
Does not necessarily imply physical convergence of networks
Is concerned with the development of converged network capabilities and supporting standards to offer consistent services, that may be used via fixed or mobile access to fixed or mobile, public or private networks.
An important feature of FMC is the separation of the subscriptions and services from individual access points and terminals and
The possibility of internetwork roaming using the same consistent set of services
An Operator will regard the “Customer‘s view“ as essential;(e.g. will take into account QoS classification)
Classes:BEST : Better than today‘s PSTN/ISDNHIGH : Equivalent to today‘s PSTN/ISDNMEDIUM : Equivalent to today‘s wireless NetworksBEST EFFORT : Significantly impaired but usable
Applications
Service QoS Class and Priority
IPv6 is emerging to form the basis of the NGNs and well-defined IPv6 suite will provides considerable flexibility to NGN by ◦ Improving network provisioning and operations, as well as Services to be offered to
the NGN providers and users. IP-based networks relevant to NGN can be classified into
◦ ‘IPv6-based NGN’, ‘IPv4-based NGN’, ‘IPv6-based non-NGN’, ‘IPv4-based non-NGN’ Addressing schemes, QoS, Security and Mobility are the key features
of IPv6 which may significantly impact on NGN
Overview of IPv6-based NGN
IP V6IP V6
IPv6 to NGN ◦ Enhanced service capabilities
Enables congestion/flow control using additional QoS information such as flow label, etc. The flow label field of IPv6 header enables IPv6 flow identification independently of transport layer protocols
◦ Any-to-any IP connectivity IPv6 offers the advantages of localizing traffic with unique local
addresses, while making some devices globally reachable by assigning addresses which are scoped globally
◦ Self-organization and service discovery using auto configuration Address auto-configuration of IPv6 protocol will facilitate NGNs to
support dynamic address assignments and multiple user/network identities
◦ Multi-homing using IPv6 addressing IPv6 can handle multiple heterogeneous access interfaces and/or
multiple IPv6 addresses through single or multiple access interfaces. Multi-homing can provide redundancy and fault tolerance
IP V6IP V6