Transcript CDMA Network

By
Tilak de Silva
Chief Global & Network Officer
Sri Lanka Telecom Ltd.

Overall functional architecture of an implementable NGN

Functional architecture for supporting mobility & realization
of FMC environment

Architectural point view of “QoS” & “network performance” to
meet NGN service requirement from users & providers

Relevance of IPv6 for NGN transportation

NGN Access networks

Underline network support capabilities essential for
successful NGN
GSM Network
WiMAX Network
DSL Network
MPLS Network
MEN Network
DATA
Network
CDMA
Network
PSTN Network
Multiple Platform based Vertical Network Architecture
Services
3
PSTN / ISDN
MSU/RSU/ELU
TDM Data network
CDMA Network
TDM Tx Back Bone
IP / MPLS Back Bone
Metro Ethernet Network
Data Node
CDMA BTS
Other Operators
IP-DSLAM
MEN
Node
Different networks for different services … ? ? ?
International Networks
TSC
ISC
TSC
TSC
CDMA/ PLMN
MSU
RSU
ISC
MSU
RSU
.....
MSU
RSU
MSU
ELU
RSU
Future Network
“Converged Network Model”
6
Migration
&
Limitations
No vendor
support
Un repairable
hardware/
software
faults
Expansion/
Upgrading
not possible
Large customer base
Limited VAS
capacity
End of Life Time
No/ Limited
CLI capacity
Frequent failures
Supports only
R2 signaling
Technology
already
obsolete
CDR not
properly
generated for
Value Added
Services
Customer demand for
new features
7
Why NGN……..
Pave the path
to fixed
Mobile
convergence
Cost effective
Operation and
Maintenance by
means of
High system
centralized
capabilities (Call network
handling,
management
Rapid
subscriber
Less cost for
system
capacity, traffic
transport network deployment of
handling, etc…..)
(MPLS backbone) new third party
applications due
due to
Availability of new
transportation of to open
services. (Unified
architecture
packets
messaging, IP
Centrex/Hosted PBX,
etc…)
High
One network
competitiveness
for all services
due to large
(Voice, Video
Less OPEX
number of
& Data)
manufactures
Less CAPEX …????
8
NGN /IMS
MSAN
Other Operators
IP / MPLS Back Bone
CDMA Network
TDM Tx Network
Other Operators
CDMA
BTS
ALL IP + Voice
TDM → ALL IP
Control Layer
ALL IP → FMC
Softswitch
ALL IP + Multimedia
ALL IP + FMC
IMS
PSTN
Transport Layer
MPLS IP
OSS / BSS
Convergence
Servicebased IP QoS
Access Layer
Database
Convergence
MSAN +
DSLAM
MSAN + DSLAM
+ HGW
IAD / SIP Phone
Time of maturity and popularity
Industry
Chain Ready
NGN architecture defined in
ITU-T Rec. Y.2012
IMS Functional Architecture Model

NGN architecture supports the delivery of:
 PSTN and ISDN replacement
 Multimedia services
 Content delivery services
 Video streaming
 Broadcasting etc.
ITU-T Rec. Y.2012

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.
Subscriber
Operator
Mobile
Operator
Home location
in Mobile
network
Increasing mobility
Only one contract /one bill
Seamless services
home zone billing
Acquisition of new subscribers by new services
mainly with existing infrastructure / partly
shared infrastructure
Operator
Fixed & Mobile services
Fixed
Operator
Demand for New
FMC features
Mobility in
network
FMC is driven by increasing demand
for mobility in all networks

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
HIGH
MEDIUM
BEST EFFORT
:
:
:
:
Better than today‘s PSTN/ISDN
Equivalent to today‘s PSTN/ISDN
Equivalent to today‘s wireless Networks
Significantly impaired but usable
Applications
Service QoS Class
and Priority
PSTN to NGN Migration
Services
Session
Control
Transport
Access
Session Control Platform with
Enriched Features
Reliable Transport Network in
Higher Capacities
Widely Spreaded Access
Networks
20
Transport & Access Networks
Transport
IP Network
Aggregation
Network
Aggregation
Network
PON
NodeB
WiMAX
21
Only Copper to Home
Separate Fiber
to BTS
(2/3G,WiMAX)
O/F
Transport /
Aggregation
Network
Separate Fiber to AGW
O/F
PON
OLT
PON for both
AGW & Node B
22
IP V6

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 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
autoconfiguration
 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