Broadband Multiplay

For circulation to Trainees only

Concept of

Broad Band & Multiplay


What is Broadband?

An always-on data connection that is able to

support interactive services including Internet

access and has the capability of the minimum

download speed of 512Mbps to an individual

subscriber from the Point Of Presence (POP)

of the service provider.


What is Multiplay Broadband?

Multiplay is an extension of Triple-Play technology,

meaning, running all sorts of services on the same

medium. Multiplay aims to make your telephone wire

carry multiple applications of voice, data and video

through the Set Top Box. Multiplay will strive to be your

one stop solution for all your information,

communication and entertainment needs.


BSNL will be offering services like Video-On-

Demand, Radio, Television Channels,

T-Education, T-commerce, Virtual Shopping,

Video-Conferencing, Audio-On-Demand and

many more.

What is Multiplay Broadband?


Basic Broadband

IPTV

Video On Demand

Bandwidth on Demand

Gaming On Demand

Audio on Demand

Video Conferencing

Video telephony

VoIP

Multiplay Broadband Services


Multiplay Broadband Services


Multiplay Broadband Connectivity


Multiplay Broadband User End


Components of BB Networks

Customer premises Equipment ( CPE) : It is consist of

Two part . One part is Splitter which separate the voice data

and Internet data and an ADSL modem based on ADSL2+

Standard which send/ Received customer request to DSLAM.

Data Between Modem and DSLAM is Follow ATM Protocol.

DSLAM : It is a digital subscriber line Access Multiplexer. It

mux and demux the voice and data packets and Change

packets from ATM packet to VLAN ( Ethernet packets ). It

send the packet to customer virtual LAN which is established

between BRAS/BNG and DSLAM during set up of connection.

Tier 2 Switch : This is aggregation switch which aggregate

the packets coming from different DSLAM.


Components of BB Networks Tier 1 Switch :This is aggregation switch which aggregate the

packets coming from different Tier 2 Switch.

Broad Band Network Gateway ( BNG) : This is intelligent

router which is responsible for routing the packets, allotting the

dynamic/static public IP to customer, start the session, stop the

session, control the customer speed, communicate with

Authentication server, DNS server etc.

Broad band Remote Access Server ( BRAS)/BNG: This is

a intelligent router which is responsible for routing the packets,

allotting the dynamic/static public IP to customer, start the

session, stop the session, control the customer speed,

communicate with Authentication server, DNS server etc.


All connectivity are build using fibers up to DSLAM Level.

Only the connectivity between DSLAM and CPE is on the

Copper wire.

Components of BB Networks


Components of Core Network

Edge Routers : Routers routes the packets to

neighbours router as per destination IP Address.

MPLS: It is a multi protocol level switching system

which are builded by connecting using different

routers. It is a system that lies between data link

layer and network layer. All routers are connected

with STM-16 and have mesh connectivity to one other.

Core Router: Core router is Part of MPLS network

which is connected to International Gateway routers

for internet traffic.


Core Data Network

Metro Cities= Fully Mesh STM-16

Big Cities = Dual Home connected with STM-16 to Metro cities

Medium cities= Dual Home connected with STM-16 to Metro or Big cities

Small Cities = Dual Home connected with STM-1 to Metro, Big or Medium cities

Small District nodes = Only PE router connected to nearest Core router with STM-1


Miscellaneous Routers

IGW International Gateway Router Connectivity to Internet is through this router

IXP Internet Exchange Point ISPs connect each other through this router

IDC Internet Data Center for connecting to Data Centers

IPTAX IPTAX Project planned to be connected to Internet Backbone through this router

RR Router Reflector For reflecting of BGP routes to the PE-Provider Edge Router


Network Connectivity (BroadBand)

X-ge A

Tier 2 LAN Switch

ADSL

terminals

FE

ADSL

terminals

..DSLAM.. X-ge B

X-ge C

ADSL

terminals

FE

ADSL

terminals

..DSLAM..

X-ge DX-ge E

ADSL

terminals

FE

ADSL

terminals

..DSLAM..

X-ge F

Tier1 GigE

Aggregation

SWGigE

BBBroadband

RAS

ADSL

terminals

..DSLAM..

Core

router

Core

AAA LDAP

Provisioning

NOC SSSS


Broad band traffic from PC to Internet Cloud will follow 3 protocols.

1. PC to CPE: Traffic will flow in the form of Ethernet packets through

LAN cable or USB cable or Wifi wireless between CPE and PC/Laptop.

2. CPE to DSLAM: Traffic will flow in the form of ATM packets through

cupper wire.The ATM frequency range is 0 to 2.2 Mhz. The different

services have different pvc which identified by VPI and VCI numbers.

E.g Internet VPI-0 and VCI-35 and For IPTV VPI-0 and VCI-100.

3. DSLAM to BRAS/BNG: Traffic will flow in the form of Ethernet

packets through VLAN set up between customer DSLAM port and

BRAS/BNG virtual node.

Traffic Flow in BB Networks


Multiplay Broadband

Multiplay Broadband provides voice, data and streaming

video services.

Maximum download speed can go up to 24 Mbps.

On demand services like Audio on Demand (AoD),Games

on Demand (GoD), Video on Demand (VoD), Video

Conferencing, IPTV etc. can be easily planned through

Multiplay Broadband.


N1 N2

NiN255

Multiplay Broadband Network

Fibre grids to support high Bandwidth with resilience

Tier 2 Ring


Resilient packet Routing (RPR) technology.

Best suited for a broadband core network.

Pure Data Ring on fiber.

Dual counter rotating ring topology.

N1 N2

NiN255

Inner (Outer) ring carries inner (outer) ring data and control signal for outer (inner) ring.

RPR


Typical Network Architecture - Multi Play

MPLS

Nation wide

Core backbone

RPR

Aggregation

Layer

MPL

S

Layer

Broadband Network

Gateway (BNG)

Tier 1 Sw

Tier 2 Sw

STM-16

CDN Server

10 G

RPR

10 G

RPR

PE Router

Mega POP

GE

DSLAM CPE

Internet

Documents

Broadband Multiplay