2nd Generation DVB Interactive Satellite System
Dr Harald Skinnemoen (AnsuR, Representing SatLabs)
Chairman DVB TM-RCS (contact: harald@ansur.no)
Copyright © Digital Video Broadcasting Project DVB
2nd generation DVB Interactive Satellite System
State-of-the art technology
Substantial enhancements
over 1st generation DVB-RCS
2011: First phase DVB-RCS2
completed /approved January
Commercial name DVB-RCS2
DVB-ISS is an abbreviation of the
ETSI Work Item & Document title
Slide 2
DVB Satellite Standards - Always Leading the Way ;-)
First DVB standard
DVB-S
First DVB interactive
Satellites are the
DVB-RCS best!
First 2nd gen
DVB-S2
First 2nd gen interactive
DVB-RCS2
Slide 3
2nd Generation DVB Interactive Satellite System (DVB-ISS)
Overview and System Specification (OSL)
Higher Layer for Satellite (HLS) Lower Layer for Satellite (LLS)
Slide 4
2nd Generation DVB Interactive Satellite System (DVB-ISS)
Overview and System Specification (OSL)
Overview of System
Definition of Profiles and Terminal Capabilities
Interoperability Management Migration Scenarios from DVB-RCS
Higher Layer for Satellite (HLS) Lower Layer for Satellite (LLS)
Reference System Architecture Two-Way Interactive Satellite System Models
Addressing Addressing
Forward Link
Return Link Physical
Network Layer Functions Channel
Return Link Signalling Forward Link Signalling
Management, FCAPS, Object Models, OSS-NMC,
Layer 2 Management and Supervision
Protocols
Installation, Motor, SW Update, Configuration, Logon Mobile Terminals
Mesh Networks Security
Slide 5 HS
Channels, Interactivity and Systems
Slide 6
2nd Generation DVB Interactive Satellite System (DVB-ISS)
Overview and System Specification (OSL)
Overview of System
Definition of Profiles and Terminal Capabilities
Consumer Corporate SCADA
Multi-dwelling Institutional Backhaul
Interoperability Management Migration Scenarios from DVB-RCS
Higher Layer for Satellite (HLS) Lower Layer for Satellite (LLS)
Reference System Architecture Two-Way Interactive Satellite System Models
Network Layer Functions Return Link Physical Forward Link
Addressing Addressing
Addressing Routing
Dedicated / Random
Access Control
Quality of Service Operator Virtual Networks Coding and Interleaving
Modulation
(QPSK/QAM - CPM)
IPv4/v6 issues Interfaces
Return Link Signalling Forward Link Signalling
Management, FCAPS, Object Models, OSS-NMC, Protocols
Layer 2 Management and Supervision
Installation, Motor Antenna, SW Update, Configuration, Logon
Mobile Terminals
Mesh Networks Security
Slide 7 HS
Overview and System Specification (OSL)
Overview of System
Definition of Profiles and Terminal Capabilities
Consumer Corporate SCADA
Multi-dwelling Institutional Backhaul
Interoperability Migration Scenarios
Management from DVB-RCS
Slide 8
Lower Layer for Satellite (LLS)
Two-Way Interactive Satellite System Models
Return Link Physical Forward Link
Addressing Addressing
Dedicated / Random
Access Control
Coding and Interleaving
Modulation
(QPSK/QAM - CPM)
Return Link Signalling Forward Link Signalling
Layer 2 Management and Supervision
Mobile Terminals
Security
Slide 9
Higher Layer for Satellite (HLS)
Reference System Architecture
Network Layer Functions
Addressing Routing
Quality of Service Virtual Satellite Networks
IPv4/v6 issues Interfaces
Management, FCAPS, Object Models, OSS-NMC, Protocols
Installation, Motor Antenna, SW Update, Configuration, Logon
Mesh Networks
Slide 10
The Specifications of 1st and 2nd Generation
1st Generation – single document
Interaction channel for satellite distribution systems
Commercial name DVB-RCS. ETSI number EN 301 790
2nd Generation – multipart document
Second Generation DVB Interactive Satellite System
Overview and System Specification (OSL)
Higher Layer Satellite Specification (HLS)
Lower Layer Satellite Specification (LLS) (replaces EN301790)
Commercial name DVB-RCS2. ETSI number xx 101 545
RCS = Return Channel Satellite
The specification is for a two-way system
Slide 11
Slide 12
Main Enhancements over RCS 1st Gen
Slide 13
Rain Attenuation, Paris
Attenuation (dB) for PARIS, FR
30
50 GHz
40 GHz
30 GHz Rain Attenuation, Paris
25 20 GHz
15 GHz
12 GHz
20
15
10
0
99 99.1 99.2 99.3 99.4 99.5 99.6 99.7 99.8 99.9 100
Percent of Time Not Exceeded
Slide 14 14
Adaptive Coding and Modulation (ACM)
Optimizes performance to the
available capacity
rather than worst-case scenario.
Significant increase in
capacity/availability
Forward link DVB-S2. ACM, VCM
Return link modulation CPM,
QPSK, 8PSK and 16QAM
Per-timeslot ACM configuration
more granular and flexible just-in-
time timeslot adaptation.
Slide 15
Continuous Phase Modulation (CPM)
4-state modulation
Innovative weighted average pulse
shape
CPM may give lower-cost terminals
Non-linear signals > cheaper
amplifiers
Terminals support both
modulations
ODU instabilities make CPM relatively
better
Higher spectral efficiency favors QAM
Slide 16
Coding / Carrier / Access
16-state turbo code
for QPSK, 8PSK and 16QAM
benefits substantially from last decade coding development
Random Access option for SCADA / intermittent data
more responsive - less delay
DVB-S2 Continuous Carrier return link (planned)
option in adaptive or variable mode (ACM/VCM)
From RCS+M
DVB-S2 adapted to low rates.
Power headroom reporting. EIRP control alternative
Constant power spectrum density for carriers of different BW
Constant EIRP
Slide 17
Generic Stream Encapsulation (GSE)
Generic Stream
Encapsulation (GSE) with
strengthened integrity
control in forward link.
Return link packet
encapsulation (RLE) is
adaptation of GSE.
Saves significant overhead
Slide 18
Security, Installation, IPv6
Improved security
Not one specific technology
Careful review of all technologies and overall architecture
The strong governmental markets position is maintained
Simplified antenna installation
Possible use of motors for adjusting pointing.
Improved QoS architecture
Support for cross-layer optimization
Performance enhancing proxies.
IPv6 Support
And specifications for addressing, routing and management.
Slide 19
OSL: System profiles
Defining use of HLS/LLS capabilities and parameters
for various applications/markets.
Definition of profiles for test and interoperability
Slide 20
How will this go with
the new powerful
standard…!?
Slide 21
