Transcript Document

BROADBAND TECHNOLOGIES & SERVICES
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Broadband Technologies -Core Network
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BROADBAND
Broadband Signifies :
High Bandwidth
• High Access speeds, 256 Kbps t o 100 Mbps
• Huge Core bandwidth pipes, STM –16 (SDH), GigE (MEN) and 2.5 GigE
(DWDM / CWDM)
Multiple Converged Services
• High Speed Data
• Voice
• Video
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BROADBAND SERVICES
Services Offered On Broadband :
• Data Services
• High Speed Internet Services
• Point to Point and Point to Multi Point VPN Services
• Web Hosting Applications
• Walled garden (Internet on TV)
•Voices Services
• Audio Conference
• Voice over IP (VoIP)
•Video Services
• Video Broadcast
• Video on Demand
• Video telephony
• Online Gaming
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BROADBAND SERVICES
Services Offered on Broadband
Web
Hosting
Multimedia
Conference
Video/AudioOn-Demand
Video on PC
Online
Gaming
Revenue
Value-added Applications
Value Add
applications to
boost revenues
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Basic Telecom Service
Voice
Internet
Time
BROADBAND COMPONENTS
User
Access
Core
Backend
Business
Voice over IP
IP VPN
video
communication
Residential
gaming
NMS Server
Access
&
Aggregation
Network
Core
Network
NMS Client
Radius Server
video
Video Server
Soft Switch
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BROADBAND NETWORK ELEMENTS
Network Elements – Technology Options
• Corporate / SME / SOHO
User
• Residential
• Wired Access ( DSL, Cable, FTTH)
The Access
• Wireless ( BWA, Wifi )
• The Media
•Optical Fiber
The Core
• The Technology
• SDH
• CWDM / DWDM
• ATM
• Ethernet
• Authentication Server
Backend
• Content Servers
• Web Hosting Servers
• Video Servers
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BROADBAND NETWORK COMPONENTS
Core Network
Access
FTTH 100M
STB
Backend
MPLS
M/C
2 Fiber SM
G.652
Internet
Dual Homed
Ring
GigE
GigE
GigE
DSLAM
Internet
Gateway Router
BBRAS
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•DNS
•DHCP
•AAA
•Voice Services
Server
•Internet Data
Services Server
•TV/Video
Services Servers
CORE NETWORK TECHNOLOGIES
BB Core Technologies:
Core Network:
Architecture
• Ring
• Single Homing
• Dual Homing
• Mesh
Technology
•ATM / IP / Ethernet
• SDH
• SDH over CWDM / DWDM
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RING ARCHITECTURE
Advantage
•Low Cost
•Simple Architecture
Disadvantage
•Hub – Potential Single Point failure
Target Application
•Towards Access and Low Capacity Core
Advantage
•Highly Reliable
•Disadvantage
•High Cost Solution.
Target Application
•High Capacity Core
2 Fiber SM
G.652
Aggregation
Ring
Collector
Ring
Core Switch
Dual Homed
Single Homed
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MESH ARCHITECTURE
Advantages
• Extremely Reliable
• Protection against Equipment / Fiber failure
Disadvantages
• Very Complex and Costly to implement
Dual-Homed Mesh
Core Ring
Target Application
• Highest Tier in Core
Mesh Network
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CORE TECHNOLOGIES
Technology Options on Core
1.
2.
3.
ATM Backbone
IP / Metro Ethernet
SDH / CWDM / DWDM.
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ATM BACKBONE
Traditional ATM Backbone Core
Benefits:
1. High deployment across the world
2. Stabilized Technology
3. Aggregation through multiple E1’s or upto STM 16 rings.
4. Good for aggregating Higher bandwidths.
Drawbacks:
1. ATM pvc uses 10% overheads
2. Higher Provisioning time.
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ATM BACKBONE CORE
DSLAM for Residential Internet Access– Traditional Way
xDSL
RFC 1483
Bridged Access
E
STM4/STM16
FTTH 100M
STM4/STM16
A
D
Metro Ethernet
LAN Switch
STM4/STM16
ATM MESH
STM4/STM16
RFC 1483
Bridged Access
RFC 1483
Bridged Access
B
Internet
xDSL
Broadband RAS
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METRO ETHERNET CORE
Metro Ethernet Core
Benefits:
1. Deployment has started in Huge way across the world
2. Aggregation through Fast Ethernet or Gigabit Ethernet.
3. Highly recommended for high bandwidths requirements.
Drawbacks:
1. Technology getting standardized
2. Limited support for VLAN’s.
3. Single broadcast domain.
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BROADBAND TECHNOLOGIES & SERVICES
DSLAM for Residential Internet Access– Next Generation
FE/Gig
xDSL
Ethernet Service
Connectivity Provider
FE/Gig
FE/Gig
FE/Gig
Internet
FE/Gig
Internet
Gateway Router
xDSL
IPDSLAM
Broadband RAS
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SDH / CWDM / DWDM CORE
Inter-City Backbone
Network
Backbone
ATM
STM1/STM4
on ATM
2 Fiber SM
G.652
Metro Transport
and Aggregation
Network
SDH
STM1/STM4 on Sonet
Core Switch
Aggregation
Ring (CWDM/DWDM)
MPLS
GigE
GigE
GigE
DSLAM traffic going to the
core through Metro Ethernet
Ethernet UNI
Aggregation Node
Internet
Access Router
Internet
Gateway Router
BBRAS
SDH Network
STM 1/4/16
xDSL
Ethernet UNI
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Internet
• Voice Services
Server
•Internet Data
Services Server
•TV/Video
Services Servers
•DNS
•DHCP
•AAA
BROADBAND SERVICES
•Multiple Technology Options for Changing Needs
•Need for multiple service offering
•Focus on Centralized Management and Provisioning
THANK YOU
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