networking for atsc 3 - society of broadcast engineers · networking for atsc 3.0 presentation...
TRANSCRIPT
Networking for ATSC 3.0Part 1
Wayne M. Pecena, CPBE, CBNE
Texas A&M University
Educational Broadcast Services – KAMU TV & FM
Networking for ATSC 3.0Presentation Scope:ATSC 3.0 promises to revolutionize the television broadcast industry with integration of traditional over-the-air (OTA) signals and broadband delivered IP content. A key attribute of the ATSC 3.0 standard is the use of the Internet Protocol (IP) as the transport platform. The use of IP as a core transport platform creates the need for the broadcast engineer to have a high competency in networking technology to successfully design, build, and support the ATSC 3.0 infrastructure. This multi-part webinar series will provide a foundation in networking technology utilized in an ATSC 3.0 infrastructure.
Part 1 - Introduction to ATSC 3.0 station architecture, networking standards, and the physical layer.
Part 2 - Ethernet switching in depth to include network architecture design for performance and security by use of vlans to provide network traffic isolation.
Part 3 - IP routing, secure remote access, and security best practices to insure reliable system operation and ongoing support capability.
2
Networking for ATSC 3.0
Today’s Outline
▪ ATSC 3.0 Introduction & Brief System Architecture▪ The OSI Model, IEEE, IETF, & ATSC 3.0 Standards
▪ The Physical Layer▪ Closing Thoughts
3
Introduction
• Configurable, Scalable, Efficient, Interoperable, & Adaptable 1:
• Robust Mobile Reception (OFDM)
• Ultra High-Definition Video (4K, HDR, WCG, HFR)
• Immersive Audio (AC-4)
• Internet Protocol Transport Enabled (IP)
• Advanced Application Support• Emergency Alerting
• Terrestrial / Broadband Integration
• Interactive Applications
1 Rich Chernock, ATSC TG3 Chairman 4
https://nabpilot.org/deploying-the-atsc-3-0-broadcast-ecosystem-v6-3/
IP
5
ATSC 3.0 Shannon's Limit
6
ATSC 3.0 PLP’s
6MHz
Channel
ATSC 3.0Transport
Stream
High Capacity4K UHD
Robust MobileReception
“PLP”
Physical
Layer
Pipes
7
PLP Config:- Modulation- Coding- Interleaving
The OSI ModelOpen Systems Interconnection (OSI) ModelDeveloped by the International Organization for Standardization (ISO)A Conceptual Model – Abstract in Nature – Modular in Structure Provides “Layer Swapping” – Partitions Communications Function -Defines How Data Traverses From An Application to the Network
Networking
Focus
8
Open Systems Interconnection “OSI” Model
Application
Session
Presentation
Transport
Physical
Data Link
Network
7
5
6
4
1
2
3
User Application Interaction
Tracks User Sessions
Inter-Host Communications
Standardizes Data Encoding/Decoding/
Compression/Encryption
Manages End-End Connections:
TCP, UDP, & Flow Control
Interfaces to Physical Network, Moves Bits Onto &
Off Network Medium
Provides Network Access Control, Physical
Address (MAC), & Error Detection
Provides Internetwork Routing (path)
Provides Virtual Addressing (IP)
9
Standards
• IEEE- Institute of Electrical & Electronic Engineers
• Project 802 Ethernet Standards:
• 802.1 Bridging
• 802.3 Ethernet
• 802.11 Wireless
http://standards.ieee.org/about/get/
https://www.atsc.org/
10
Layer 2 Standards:IEEE- Institute of Electrical & Electronic Engineers
• Project 802Ethernet Standards:
• 802.1 Bridging
• 802.3 Ethernet
• 802.11 Wireless http://standards.ieee.org/about/get/
11
Layer 3 Standards:IETF – Internet Engineering Task Force
• Request for Comments – RFC’s
• The “Standards Bible” of the Internet
• Used to Explain All Aspects of IP Networking
• Nomenclature “RFC xxxx”
• Requirement Levels:
• Required
• Recommended
• Elective
• Limited Use
• Not Recommended
www.rfc-editor.org/rfc.html
12
ATSC 3.0 Standards
https://www.atsc.org/standards/atsc-3-0-standards/13
ATSC 3.0 Infrastructure
14
Network Models & ATSC 3.0 Layer Architecture
InternetProtocolData-Flow
Layers
15
My Simplified ATSC 3.0 Station
HEVC EncodersDASH Encoders
HEVC EncodersDASH Encoders
Route / Signaling ServerBroadcast Gateway
STLEthernet Radio
Fiber
ATSC 3.0Exciter
Transmitter
SDI / IPSource
SDI / IPSource
IP
IPIP
IP
IP
IP
IP
16
Actual ATSC 3.0 Station
HEVC EncodersDASH Encoders
HEVC EncodersDASH Encoders
Route / Signaling Server
Broadcast Gateway
STL - Ethernet RadioATSC 3.0Exciter
Transmitter
SDI / IPSource
SDI / IPSource
STL - FiberIP Connected Devices
VLAN(s)
Ethernet Switch
Ethernet Switch
17
Use VLAN(s) to Segment Traffic:- Performance- Security
The Physical Network
18
Ethernet Beginnings
• Conceptually Based Upon “ALOHA NET”
• Developed as a “Wireless” Network byNorman Abramson & colleagues
• Deployed at the University of Hawaii in 1971
• Later Refined at Xerox PARC in 1973
• Bob Metcalf & David Boggs “Fathers of Ethernet”
• More Ethernet History:
http://ethernethistory.typepad.com/
19
Ethernet Media Evolution
Thicknet Vampire
Tap
Thinnet
Topology Also Migrates from “Bus” to “Star” Based
20
Too Many Types of Ethernet
21
Ethernet Standards
22
Ethernet SFP Transceivers“Single Form-factor Pluggable” – SFP / SFP+ / XFP (mini GBIC)
Transceiver - LC Fiber Connector
Copper or Optical Based Transceiver to Provide Flexible
Physical Interface
23
Multi-Mode vs Single Mode Fiber
• Multi-Mode• Larger core – gather
more light
• Short Distance (100m)
• Typical - 850 nm
• Cheaper $
• Single Mode• Smaller core – tight mfg.
tolerances
• High BW – Long Distance (100 km)
• Typical 1310 / 1550 nm
• More Expensive $$
24
• Data SFP Transceiver (1 Gbps)
• 1000-Base-T
• SX series
• LX series
• EX series
• ZX series
• And others……
• Video SFP Transceiver (SDI SFP)
• 3G-SDI
• 6G-SDI
• 12G-SDI
HD-BNC / micro BNC25
SFP DDM (Digital Diagnostics Monitoring)
• DOM – Digital Optical Monitoring• Output Power
• Input Power
• Laser Current
• Laser Temperature
• Supply Voltage
• Alarm Conditions
27
Optical GuidelinesExample Loss Budget – Actual Levels Dependent Upon Specific Optical TX & RX Devices
Optical
TX
Optical
RX
Launch Power Receive Power
Fiber Optic
Patch Panel
Fiber Optic
Patch Panel
FO
Jumper
FO
Jumper
System Loss
-3 to -9 dB -9 to -19 dB
1.0 dB / km – 1310nm MM
0.5 dB / km – 1310nm SM
0.3 dB / connector0.3 dB / connector
-6 Ideal -14 dB
Too Much RX Power
Can Be Detrimental As
Not Enough - Attenuate
28
SFP Color Coding (ODM wavelength)
29
TX
RX
Bale Color
Twisted-Pair Installation Practices
• Follow Industry “Best-Practices”
• Twisted-Pair Ethernet @ High Speeds• AC Placement / Separation
• Bundling
• Bend / Knots / Pull Strength
• Maximum Length
• Fiber Optic Cabling• Bundling
• Bend Radius / Pull Strength
• Length (optical attenuation)
• Connector Installation
30
https://www.ctctechnologies.com/wp-content/uploads/2017/04/Network-Cabling-Design-Best-Practices.pdf
Networking for ATSC 3.0Presentation Scope:ATSC 3.0 promises to revolutionize the television broadcast industry with integration of traditional over-the-air (OTA) signals and broadband delivered IP content. A key attribute of the ATSC 3.0 standard is the use of the Internet Protocol (IP) as the transport platform. The use of IP as a core transport platform creates the need for the broadcast engineer to have a high competency in networking technology to successfully design, build, and support the ATSC 3.0 infrastructure. This multi-part webinar series will provide a foundation in networking technology utilized in an ATSC 3.0 infrastructure.
Part 2 - Ethernet switching in depth to include network architecture design for performance and security by use of vlans to provide network traffic isolation. June 26, 2019
Part 3 - IP routing, secure remote access, and security best practices to insure reliable system operation and ongoing support capability. July 24, 2019
31
Learning More About ATSC 3.0
32
References:
33
References:
https://www.atsc.org/standards/atsc-3-0-standards/34
Closing Thoughts
• Use of the Internet Protocol Brings Unique Features to ATSC 3.0
• Flexible & Scalable Transmission System
• Enhanced Emergency Alerting
• Enables Terrestrial / Broadband Integration
• Provides Interactive Application Support
• The Internet Protocol (IP) Is The Key to Terrestrial & Broadband Integration
• Networking Knowledge is Essential for the Broadcast Engineer
• Follow the OSI Model Data-Flow Layers – Focus Upon:
• Physical Layer – Know Ethernet In-Depth
• Understand Ethernet Switching – VLAN Implementation
• Know the Internet Protocol - IP Multicasting
35
Distinguished Lecturer
Vice President, National Board of Directors
Executive Committee Member
Chair, Education Committee
Wayne M. Pecena
Texas A&M University
979.845.5662