fundamental aspects ngn

7/23/2019 Fundamental Aspects NGN

1/44

Essential Features of Public Network

RequirementsQoS guarantee

High availabilit Equi!ment hot"swa!!able har#ware

$$%$$$& availabilit

'n"line software u!gra#es

Scalabilit

(ase# on global )o!en* stan#ar#sSu!!ort for a new range of a!!lications


2/44

E+,S-,N. NE-/'R0S

PS-N1 -he network consists of 2ocal e3change4RS5 as a !art of

6ccess Network an# -6+s as a !art of core Network%6lrea# huge amount of mone has been investe# in PS-N

setu!

76PE+ )7a!ital E3!en#iture* an# 'PE+ )'!erational

E3!en#iture*


3/44

P28N )Public 2an# 8obile Network*

P28N has been #evelo!e# to !rovi#e voice

services for wireless subscribers% -hough in

recent times man a!!lications hasemerge# as killer a!!lication for mobile%

P28N inclu#es (-S4(S7 as access

network an# 8S7 as a core Network


4/44

PS9N4PSP9N -his network was basicall #esigne# for accessing remote

files an# servers for #efense !eo!le an# universities but

nowa#as nobo# can think of living without #ata network

services%

-he basic an# most !o!ular a!!lication of #ata networks is

,nternet% 'ther a!!lications inclu#e E"commerce: online

banking: online gaming: E"sho!!ing: ,P-; ;i#eo on#eman# an# man more% 9ata network is an assembl of

routers: which are res!onsible for forwar#ing information

from one en# to other


5/44

9rawbacks -he se!arate network infrastructure an#

no sharing of infrastructure among them%

Sharing through .atewas

'wn service !latforms in other wor#s services are

tightl cou!le# with their networks

Se!arate access trans!ort an# switching network

service !rovi#er has to invest in all the three

networks se!aratel

76PE+)7a!ital E3!en#iture* an# 'PE+


6/44

/h N.N


7/44

N.N ;ision

Ne3t .eneration Network is the framework where o!erator willhave a common trans!ort network base# on ,nternet Protocol for

!rovi#ing all kin#s of telecommunication services%

Hence o!erators will have to install an# maintain onl a singlenetwork: which will re#uce its 76PE+ an# 'PE+ significantl%

8oreover service !rovisioning will become easierbecause of the

intro#uction of new an# intelligent servers%

N.N is able to!rovi#e ;en#or in#e!en#encebecause of the

stan#ar# !rotocols it uses for interaction with network elements%


8/44

N.N 9efinition

,-5"- #efinition for N.N1

6 Ne3t .eneration Network )N.N* is a !acket"base# network able to !rovi#e services inclu#ing-elecommunication Services an# able to make useof multi!le broa#ban#: QoS"enable# trans!ort

technologies an# in which service"relate#functions are in#e!en#ent from un#erlingtrans!ort"relate# technologies%

,t offers unrestricte# access b users to #ifferent

service !rovi#ers%,t su!!orts generali=e# mobilit which will allow

consistent an# ubiquitous !rovision of services tousers


9/44

N.N ,-5 Pers!ective

Ne3t .eneration Network )N.N* !rovi#es a frameworkfor network evolution: as #efine# b the ,-5"- )Rec%>%?@@A*

0e 7haracteristics

Packet"base# network Bgenerall ,nternet Protocol or ,PC ,n#e!en#ence of service"relate# functions from un#erling

trans!ort technologies

,nterworking with legac networks via o!en interfaces

.enerali=e# mobilit5nrestricte# access b users to #ifferent services an#4or

service !rovi#ers


10/44

E-S, )Euro!ean -elecommunication

Stan#ar#isation ,nstitute* #efines the N.N as a

conce!t for #efining an# #e!loing networks: which#ue to their formal se!aration into different layers

and planes and use of open interfaces, offers

service providers and o!erators a !latform: whichcan evolve in a ste!"b"ste! manner to create:

#e!lo an# manage innovative services%

NGN Definition (ETSI)NGN Definition (ETSI)


11/44

Fun#amental 6s!ects N.NFun#amental 6s!ects N.N Packet"base# transferPacket"base# transfer

Se!aration of control functions among bearer ca!abilities: call4session: an#Se!aration of control functions among bearer ca!abilities: call4session: an#

a!!lication4servicea!!lication4service

9ecou!ling of service !rovision from trans!ort: an# !rovision of o!en interfaces9ecou!ling of service !rovision from trans!ort: an# !rovision of o!en interfaces

Su!!ort for a wi#e range of services: a!!lications an# mechanisms base# on serviceSu!!ort for a wi#e range of services: a!!lications an# mechanisms base# on service

buil#ing blocks )inclu#ing real time4streaming4non"real time services an# multime#ia*buil#ing blocks )inclu#ing real time4streaming4non"real time services an# multime#ia*

(roa#ban# ca!abilities with en#"to"en# QoS an# trans!arenc(roa#ban# ca!abilities with en#"to"en# QoS an# trans!arenc

,nterworking with legac networks via o!en interfaces,nterworking with legac networks via o!en interfaces

.eneralise# mobilit.eneralise# mobilit

5nfettere# access b users to #ifferent service !rovi#ers5nfettere# access b users to #ifferent service !rovi#ers


12/44

N.N 6rchitecture

N.N 7once!t 6 unifie# !acket trans!ort laer for all t!es of services

6 session base# control architecture For user to user voice : vi#eo an# #ata services over the !acket infrastructure

6 common Service #eliver !latform

E3!ectations from N.N

.enerate new revenue streams b having fast roll out of newmultime#ia services

Secure voice revenue stream b integrating PS-N

infrastructure with N.NProvi#e solution to cater to PS-N obsolescence wherever

a!!licable


13/44

Requirements for N.N ,m!lementation

Equi!ment an# Network ,ntero!erabilit between various'!erators 6 stan#ar#s base# functional architecture

Stan#ar# interfaces an# !rotocols

6bilit to serve Fi3e# )7o!!er an# fibre*: /ireless an# 8obile

Networks '!en Services 6rchitecture

Stan#ar# interfaces o!en to thir# !art a!!lication service!rovi#ers

QoS 7ontrol 8echanism ,m!ortant for voice an# vi#eo services

Requires ban#wi#th allocation mechanism at access level as it isshare# between various services


14/44

Requirements for N.N ,m!lementation

Nee# to share management functions like!rovisioning: metering: billing: QoS monitoring

Provi#e .enerali=e# 8obilit features

8obilit features at the fi3e# access: noma#ismProvi#e service continuit between fi3e# an# mobile

access lea#ing to convergence

7ommon technolog for trans!ort laer

,P48P2S has emerge# as the most suitable

technolog for this laer


15/44

N.N 7once!t


16/44

N.N 7once!t

PS-

N

P28

N

PSP

9N

Service 4 6!!lication 2aer

7ontrol 2aer

-rans!ort 2aer

6ccess 2aer

Each vertical on the left has to be s!lit into Network

Elements that ma! onto each hori=ontal on the right


17/44

NGN Architecture

NGN is a layered architecture consisting of transport, access, control and application

layer. It is important to note that all the layers are independent from each other.Change in one layer should not affect other layers


18/44

Interfaces

Switching

Call ControlCall Server /

Soft Switch

Routers ofI/!"S

Networ#

Gateways

S$N

SwitchNGN Components

S$N to NGN !apping

$%!

$ransport

Networ#Common IP MPLS Transport

S. 4 -8. 4 26.


19/44

Service X Service Y

Separated control

NB Wireless

BB Wireless

BB Wireline

IP/MPLS Transport Core

Management

Service 2aer

7ontrol 2aer

6ccess 2aer

Open interfaces

S,P

H%?D QoS 8echanism

F87

5sage 8easurement


20/44

N.N 7once!t

Service 4 6!!lication 2aer

6!!lication 2aer

-rans!ort 2aer

6ccess 2aer

N.N

PS-NP28N


21/44

6ccess 2aer 6ccess 2aers is res!onsible for #irect subscriber

attachment function%

N.N can su!!ort all kin# of e3isting access as well

as u!coming access an# is ca!able of !rocessing

traffic originate# from PS-N: .S8: 7986: 39S2:/i86+ or an other access sstem%

9e!en#ing u!on the t!e of access: !rotocol

conversion an#4or me#ia conversion ma berequire# at theN.N .atewas


22/44

N.N .atewas

Media Gateway:Access gatewaySignaling gateway.


23/44

8e#ia .atewa -erminates me#ia: coming from PS-N4P28N in EA 4 S-8% Here it

is res!onsible for !acketisation of me#ia un#er the instruction of

control laer

su!!orts !acketi=e# voice an# the interface to whatever me#ium the

voice is to be trans!orte# on%

-he 8. !erforms the task of !acketi=ing voice an# !rovi#ing

connections from switche# circuits )-98* to !acketi=e# circuits ),P:

Frame Rela: or 6-8*%

,t is res!onsible for me#ia conversion: resource allocation an#

resource management: an# event notifications%


24/44

8e#ia .atewa

,t is res!onsible for re!orting events to the media gateway controller)8.7* within its =one%

(etween 8e#ia .atewas )8.s* an# 8e#ia .atewa 7ontrollers

)8.7s* the !rotocol use# is !egaco/&.'()%

R-P !rotocol is use# between two 8.s for !acketi=e# bearer traffic%

-he !ur!ose of this !rotocol is to !rovi#e communications for callcontrol an# call signaling%


25/44

8e#ia gatewa


26/44

Functions of 8e#ia .atewa1

!edia Conversion*conversion from -98 circuit"switche#connections to 6-8: ,P: or Frame Rela connections

Resource Allocation* Resource allocation inclu#es the reservationan# release of all resources : un#er the #irection of the 8.7

+vent Notification* maintain the state of all resources an# re!ort thestate to the 8.7%

,f a !articular resource fails: the 8. re!orts the failure to the 8.7%

-he 8.7 maintains a state table for all resources within the 8.s in

its =one%


27/44

Signaling gatewa

,t is a bri#ge to the PS-N ,t converts between SS a##resses )!oint co#es*

an# ,P a##resses

SIG$RANarchitecture is use# between Sig .ate/a an# 8e#ia .atewa 7ontroller%

$ransport "ayer


28/44

$ransport "ayer

-rans!ort 2aer of N.N is base# on ,P%

-rans!ort 2aer forms the core of the Network%

,t basicall consists of Routers: which are res!onsible for carring

traffic originate# b access laer%

it shoul# be able to make use of ban#wi#th !olicies an# QoS !olicies%

'!erator has to think of manage# Network for its subscribers%

,t is basicall an assembl of routers connecte# with o!tical network%

-raffic coming from gatewas is !ro!erl route# b those routers


29/44

$he NGN architecture


30/44

Softswitch !edia gateway controller-* -he 8.7 is res!onsible for controlling all the 8.s within its

=one%

!erforms a number of call control functions that are t!icall

foun# in the call control !ortion of a legac switch%

-his inclu#es #etermining an# controlling signals use# on s!ecific

circuits: such as ringing an# bus tones%

-he 8.7 also #etermines the QoS require# for an one

connection at the 8.%

,n short: the call han#ling is !erforme# at the 8.7: rather than at

the 8. itself%

-his enables carriers to #e!lo less e3!ensive equi!ment at the

e#ge of their networks


31/44

S$N versus NGN*


32/44

PS-N v4s N.N PS-N

Pro!rietar interface:

switch G call control

9istribute# call

control) 8ain E3gs* 9e#icate# N4/ for

voice

E3cellent voice qualit

;en#or #e!en#ent

N.N

Stan#ar# !rotocol

7entral call control

Packets

.oo# voice qualit

'!en source !latform


33/44

,m!lementing N.N in (SN2,m!lementing N.N in (SN2

S-EP" ,1 ,P -6+ is the re!lacement of

e3isting 2evel ,42evel",, -6+ e3changes S-EP ,, 1 ,m!lemention at the local e3change

level%


34/44

8igration involves

Re!lacement of -98 network elements in a !hase# manner 8a3imum reuse of e3isting resources

5se of o!en an# mature stan#ar#s

7onvergence of access an# backbone network 7ontinuation of e3isting network ca!abilities an# services

with same or com!arable QoS an# securit

,nterworking between #ifferent t!es of networks

6##ition of new services

Phase ,1 8igration of -6+*


35/44

Phase ,1 8igration of -6+* ,n first !hase of im!lementation o!erators can re!lace their transit

network with soft"switch architecture%

'!erators can make use of the Soft"Switch architecture for theNational 2ong 9istance calls

Present Network Setu!



36/44

2ocal E3changes have to be connecte# to Signaling .atewa for signaling

trans!ort%

Signaling .atewa converts 77S messages to com!atible S,.-R6N messages

an# sen#s it towar#s 8e#ia .atewa 7ontroller or Soft"Switch

8.7 instruct concerne# originating an# terminating me#ia gatewas to !re!are connection

/hen all the con#ition for the call is met: 8.7 instruct concerne# originating an#

terminating me#ia gatewas for finall maturing the two communications%

(oth the 8.s convert receive# -98 voice to !ackets using Real -ime Protocol an# vice

versa%

6ll the communication between 8.7 an# 8. is in H%?D !rotocol%

-he #isconnection of the call is informe# b the concerne# S. to 8.74SS an# then 8.74SS

instructs both the 8.s to #isconnect the R-P link



37/44

S ft S it hi - it 6 hit t


38/44

Soft switch

"ocal / $andem

+change

(earer

(earer

Soft Switching -ransit 6rchitecture

Signaling Signaling

$!G

SGSG

$!G

Common IP MPLS Transport

S-P

"ocal / $andem

+change

S-P

Signaling


39/44

7all Processing


40/44

hase II* !igration of "ocal +changes ,n this !hase 2ocal E3changes )2Es* are re!lace# b the Soft"switch

an# 6ccess .atewas )6./* with same services%

Soft"switch with local features will be use# as a common control

element for class I a!!lications%

6ccess .atewas )6.* !rovi#es various t!es of access to the

subscribers )e%g% PS-N: ,S9N: ;I%?: 39S2 etc%* an# connects them to,P core network%

6.s ma be configure# for various class I a!!lications #e!en#ing on

en# user to!olog: #ensit: service requirements: etc%

9e!en#ing u!on the si=e of the network: a single soft"switch with

class D an# class I a!!lications ma be !lanne#


41/44

hase II* !igration of "ocal +changes


42/44

!igration from S$N to NGN

Necessity

Network convergence single network for

voice: #ata an# vi#eo

'PE+ an# 76PE+ savings

New service o!!ortunities

8igration of Services


43/44

8igration of Services

6ll PS-N services with same equi!ment: same look an# feel shoul# be !rovi#e#%

,N an# value"a##e# services ma be im!lemente# using 6!!lication Servers )6S*:

which will be accesse# b soft"switch via Session ,nitiation Protocol )S,P*%

Full 7onverge# 6rchitecture


44/44

,8S 6rchitecture

Full 7onverge# 6rchitecture

fundamental aspects ngn

Documents