Multimedia Satellite Telecommunications Group ... -...

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Multimedia Satellite Telecommunications Group Prof. Michele Luglio Ing. Cesare Roseti Ing. Francesco Zampognaro www.tlcsat.uniroma2.it DIE Dipartimento di Ingegneria Elettronica

Transcript of Multimedia Satellite Telecommunications Group ... -...

Page 1: Multimedia Satellite Telecommunications Group ... - …tlcsat.uniroma2.it/wp-content/uploads/2011/10/Brochure_online.pdf · Multimedia Satellite Telecommunications Group Prof. Michele

Multimedia SatelliteTelecommunications

Group

Prof. Michele LuglioIng. Cesare Roseti

Ing. Francesco Zampognaro

www.tlcsat.uniroma2.it

Sample Emulation outputs Real Applications traffic

TCP Reno CWND

Emulator Hardware

DIEDipartimento di Ingegneria

Elettronica

Web Interface

DIEDipartimento di Ingegneria

Elettronica

Cart_

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Page 2: Multimedia Satellite Telecommunications Group ... - …tlcsat.uniroma2.it/wp-content/uploads/2011/10/Brochure_online.pdf · Multimedia Satellite Telecommunications Group Prof. Michele

Cap

abili

ties

Res

earc

h an

d D

evel

opm

ent o

f Sol

utio

ns

End to end IP Multimedia traffic

Traffic shaping Deep Packet Inspection

QoS

IPsecTransport layer adaptation Vulnerabilities and countermeasures Key

management DVB RCS encapsulation

Security

ACM Channel modeling Link budget

Physical Layer

DAMA in DVB RCSResource assignement for

multibeam systems

Resource Management

Handover Channel impairments

countermeasures Mobile IP Protocol adaptation

Mobility

Satellite Telecomunications

Course

Teaching and training

Architecture and messaging Joint protocol optimizations

Cross Layer

Traffic analaysisNew web application

assessment Cloud Computing transmission optimization

Future Internet

Research and Development of Solutions

Cap

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VSAT Networks Heterogeneous networks DTN Emergency communications

Telemedicine Sat WSN

System architecture

Analysis Performance evaluation Design of efficient solutions (TCPN and TCPN+)

PEP

TCP/IP

Satcom Emulator

Orbital tool

Multidimension - Link Budget

NS 2- Simulator

Tools and Facilities

Capabilities

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Tests on NS2 and the emulation platform OBP and transparent payloads

Lift Off

Dynamic Traffic shaping through Deep Packet Inspection

Implementation of static and dynamic QoS for satellite segment based on DiffServ

Telesal

Real Multimedia application (VoIP, skype, etc.) testing on the emulator

Key management• Design of efficient key management

system for data security in satellite communications

• Adaptation to DVB CA and IP• Simulations in NS2

Locksat (ESA Innovation Triangle)• LOCal Key Synchronization and generation

for data security in sATellite communications• Security key renewal algorithm with frequent key

renewal without exchanging data messages over the un- secure channel

Satnex Intersection

• Identify and classify vulnerabilitiesof interconnected infrastructures;

• Identify Deploy countermeasures;• Design and implement an integrated

security system;• Identify abnormal elements;• Respond to anomalies;• Provide a mechanism for intrusion prevention

Satellite Vulnerabilities• Identification classification and countermeasures

study (prevention, detection, reaction);• Test bed implementation• Linux implementation

CL- IPsec • IP Sec adaptation to UDP Lite

to provide secure multicastservices over satellite systems

• Linux implementation

Quality of Service

Secu

rity

Qua

lity

of S

ervi

ce

SecurityDIE - Dipartimento di Ingegneria Elettronica

NITEL - Consorzio Nazionale Interuniversitario per i Trasporti e la Logistica

DIE - Dipartimento di Ingegneria ElettronicaNITEL - Consorzio Nazionale Interuniversitario per i Trasporti e la Logistica

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Emersat

Link Budget (Matlab)• Interface with STK• Updated propagation

models• Complete set

of modulation andcoding schemes

• ACM• OBP and transparent

payloads

Channel modeling(railway environment)

• Simulations in NS2 and Matlab

Physical Layer

Phys

ical

Lay

er

Resource Management

EmersatPilot network set up for Civil Protection needs Network emulation, capacity dimensioning,STK interfacing

SensibleESA Artes 3/4

IP layer bandwidth management

DAMA for DVB- RCSStandards compliant

New algorithms NS2 simulations

Linux implementation

Dynamic efficient

assignment and network

dimensioning in multibeam

systems

Lift OffESA Artes 3/4

C2PDynamic resource management with connection control protocol

Res

ourc

e M

anag

emen

t

DIE - Dipartimento di Ingegneria ElettronicaNITEL - Consorzio Nazionale Interuniversitario per i Trasporti e la Logistica

DIE - Dipartimento di Ingegneria ElettronicaNITEL - Consorzio Nazionale Interuniversitario per i Trasporti e la Logistica

Page 5: Multimedia Satellite Telecommunications Group ... - …tlcsat.uniroma2.it/wp-content/uploads/2011/10/Brochure_online.pdf · Multimedia Satellite Telecommunications Group Prof. Michele

Cross Layer

Future Internet

Traffic modeling

Satnex III

Testbed set up to assessSPDY protocol performance

New Web traffic analysis

Cloud Computing transmission optimization • TCPN+Priority management at transport layer

Futu

re In

tern

etC

ross

Lay

er

Multiple cross- layer• MAC-PHY-Transport Layer mutual

information exchange for optimal TCPdata transfers

• Simulations in NS2

CAC- TCP in HAPS/Satellite scenario• Simulation

Satnex (I and II) EC FP6• Network of Excellence• 26 partners (DLR coordinator)• Goal: to achieve long- lasting

integration of the Europeanresearch in satellite communicationand to develop a common baseof research knowledge

DIE - Dipartimento di Ingegneria ElettronicaNITEL - Consorzio Nazionale Interuniversitario per i Trasporti e la Logistica

DIE - Dipartimento di Ingegneria ElettronicaNITEL - Consorzio Nazionale Interuniversitario per i Trasporti e la Logistica

Page 6: Multimedia Satellite Telecommunications Group ... - …tlcsat.uniroma2.it/wp-content/uploads/2011/10/Brochure_online.pdf · Multimedia Satellite Telecommunications Group Prof. Michele

TCP- Noordwijk• New burst- based approach• Outperform current SCPS- TP• Maximization of the capacity utilization, especially for Web- based traffic• Preservation of fairness among flows• Friendliness with TCP Reno

TOPESA Artes 1Develop and prototype a PEP-transportprotocol fully interoperable withSatlabs’ I- PEP specification Interoperable with SCPS- TP Fair sharing among competitive TCP flows Co- existing with UDP flows Compliant with DVB- RCS DAMA Optimized for web browsing applications Delivers short data bursts fast Keeps good performance for longer transfers (images, files)

Satnex IIIESA Adaptation to DTNNetworks

Satnex I and IIComparative Performance Analysis (Reno, Vegas, Westwood, Hybla, Noordwijk)

TCP/IP

Handover• MIP• Transport layer adaptation• Multi segment networks (satellite/terrestrial wireless)

Internet on high speed trains • Architecture definition• Trellis impairments characterization• Transport layer countermeasures• Performance evaluation

Mob

ility

TCP/

IP

DIE - Dipartimento di Ingegneria ElettronicaNITEL - Consorzio Nazionale Interuniversitario per i Trasporti e la Logistica

DIE - Dipartimento di Ingegneria ElettronicaNITEL - Consorzio Nazionale Interuniversitario per i Trasporti e la Logistica

Mobility

Page 7: Multimedia Satellite Telecommunications Group ... - …tlcsat.uniroma2.it/wp-content/uploads/2011/10/Brochure_online.pdf · Multimedia Satellite Telecommunications Group Prof. Michele

Protocol architecture definition: Broadband on Vessels

Interface between ad hoc network and two satellite systems (Globalstar,

Eutelsat) segments for voice and data services

Integration of wireless terrestrial and satellite systems

SavionInterconnecting

ad hoc networks with satellite Emergency

scenario

Interface between analogical PMR

and digital telephony

Satnex IIIDelay Tolerant Networks Wireless

Sensor Networks

ImpulsoSensor Networksfor logistics

CadmoSensor networks for safety/security on public transportation bus

Design of telemedicineand emergency satellitebased architecturesOptimization of networkcapabilities for heterogeneousapplication includingelectroncefalography tranfers

Telesal

Emersat

Syst

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tect

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Sensible

System architecture

DIE

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Syst

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Page 8: Multimedia Satellite Telecommunications Group ... - …tlcsat.uniroma2.it/wp-content/uploads/2011/10/Brochure_online.pdf · Multimedia Satellite Telecommunications Group Prof. Michele

Satellite Telecomunications CourseUp to 50-60 hours class (organized in independent modules)

Adaptable to specific requirements

Main issues

Characteristics and performance of satellite systems

- Integration and Interworking in the Global Information Infrastructure (GII)- Security- Network integration- Examples of satellite systems

• Orbits• Physical layer• Multiple Access• Network issues• Spectrum• Design• Cost

• Equipment• Systems• Services &

applications• DVB RCS systems• Space and ground

segment

Architecture

Teaching and training

Application

Transport

Internet

Data link

Physical

Teac

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Page 9: Multimedia Satellite Telecommunications Group ... - …tlcsat.uniroma2.it/wp-content/uploads/2011/10/Brochure_online.pdf · Multimedia Satellite Telecommunications Group Prof. Michele

Telecommunication networks

• Introduction to communication networks• Basics on communication mechanisms

and protocols• Network architectures• Internet and the WWW• TCP/IP stacks• Web 2.0 and HTML5

Laboratory of Signal transmissions

• Signal generalities• Basics on Matlab programming• Signal sampling• Sampling applications• Discrete signal convolution• FFT• Signal processing

Broadcast communications (Transmission of Multimedia Data)• A brief history of the TV• Digital TV Systems• The MPEG Data Stream• IP Multimedia Subsystem (IMS)• IP TV• IPTV Functional Architecture• Cloud applications• IP Multicast

Telecommunications Fundamentals

Deterministic continuous-time signals

• Telecommunication systemsand services

• Definition of signals and idealtransmission

• Representation of signals in timeand frequency domain

• Affinity: cross correlationand autocorrelation between energyand power signals

• Linear and time invariant transformationbetween signals and linear time invariantsystems

• Multiplexing, analogue digital conversion,basics on channel coding, basicson modulation

Time continuous random variables and stochastic processes

• Random variables theory

• Stochastic processes, generalities,properties and moments

• Gaussian stationary noise not in baseband, white Gaussian noise in the signalspace

• Markov processes: properties,continuous and discrete time

Teaching and training

Teac

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Page 10: Multimedia Satellite Telecommunications Group ... - …tlcsat.uniroma2.it/wp-content/uploads/2011/10/Brochure_online.pdf · Multimedia Satellite Telecommunications Group Prof. Michele

Simulation activity

SatCom Emulator: configuration

Key features and standards supported

Satellite constellation tool Developed to perform analysis of satellite constellations.Able to evaluate coverage areas, delay, with extremely flexible capabilities to vary input parameters such as: orbit configuration (altitude, elevation, number of satellites), antenna patterns, user distribution on ground

Also able to implement and perform evaluations on double orbit constellations (composed of both LEO and GEO components). Hybrid constellations architecture foresees a bi directional communication with high capacity link between Earth Terminal (ET) and LEO satellites, which exchanges data with the GEO component, which exchanges data with the end user through the gateway and the terrestrial network.

For the hybrid architecture, it is possible to evaluate the visibility time (in term of cumulative distribu-tion and average value) and the amount of data transferred between the network elements. The hybrid configuration can include more LEO satellites and more GEO satellites (interconnected through IOL) ac-cording to the service and traffic requirements.

The tool is integrated in the network emulation platform.

Link budget tool Realized in Matlab is able to perform a multi- dimensional satellite link budget for tran-sponders (transparent and regenerative) operating in K (Ku/Ka) and EHF band for different communication sat-ellite scenarios (TV broad-casting, telemedicine, emer-gency scenarios, and others scenarios).

The LBT is able to be integrated into a confederation of simulators, such as STK (Satellite Tool Kit) tool, Satellite Network Emulator Platform, and external propagation models to realize a complex link budget calculator.

Considering a propagation model as external software, the output can be the antenna temperature and/or the total attenuation evaluated on the basis of the ITU models implemented in the own external software. These inputs drive the LBT to perform its functionality, to obtain link budget results. It is possi-ble to manage the LBT functionalities, thanks to a graphical user interface.

SatCom Emulator: description • Design and realization of PC/Linux based emulation platform• Real time operation • Star/mesh topology • Centralized control/management • Interfaced with real networks (Internet, WiFi, GSM, WiMax, etc.) • Interconnection with other test beds

• DVB- RCS2 access scheme has been implemented as core functionality of NS2 (satlink.cc)• Combinations of CRA, RBDC and VBDC or Random Access request schemes are available• Capacity: 2Mbit/s for Return and 10 Mbit/s for the Forward Link• TCP- Newreno is used as transport protocol over the satellite link

DIEDipartimento di Ingegneria

Elettronica

NITELConsorzio Nazionale

Interuniversitario per i Trasporti e la Logistica

Communication •  Broadband mesh or star architecture •  Simulation of narrow band and LEO links•  Real IPv4/6 for uni-multicast/broadcast•  Multiple Virtual Satellite Terminals•  NAT or direct addressing of Virtual Sat Terminals•  Acceleration with PEP selecting TCP versions•  Fine tuning of SAT terminals profiles•  Several Bandwidth Allocation Algorithms •  Layer 3 (and above) security frameworks

(e.g.OpenVPN)•  Connection Control Protocol C2P for resources

on demand

Error models•  Quasi-Error Free (QEF) channel•  Error distribution at the IP level (Ka/Ku bands)•  Plug-in for custom error models and external

tools

Forward Link Characteristics•  Adjustable maximum rate for broadcast channel•  DiffServ profile for fwd link priority multiplexing•  Multi spot support through separated subnets

Return Link Access Characteristics•  Terminal login and synchronization•  Fixed or variable bandwidth allocation:

•  Constant (session-based pre-assignment or SCPC)•  Dynamic (superframe-based BoD/DAMA)

•  DiffServ to MAC mapping for fine-tuned QoS

External Interfaces•  Web configuration and test execution GUIs•  Real time probes for system monitoring•  IP tunnel endpoints for remote connectivity to

other testbeds•  VLAN switch for HW and 3rd parties testbeds

local interconnections•  XML over TCP interface for configuration

and scenario updates

Page 11: Multimedia Satellite Telecommunications Group ... - …tlcsat.uniroma2.it/wp-content/uploads/2011/10/Brochure_online.pdf · Multimedia Satellite Telecommunications Group Prof. Michele

Simulation activity

SatCom Emulator: configuration

Key features and standards supported

Satellite constellation tool Developed to perform analysis of satellite constellations.Able to evaluate coverage areas, delay, with extremely flexible capabilities to vary input parameters such as: orbit configuration (altitude, elevation, number of satellites), antenna patterns, user distribution on ground

Also able to implement and perform evaluations on double orbit constellations (composed of both LEOand GEO components). Hybrid constellations architecture foresees a bi directional communication withhigh capacity link between Earth Terminal (ET) and LEO satellites, which exchanges data with the GEOcomponent, which exchanges data with the end user through the gateway and the terrestrial network.

For the hybrid architecture, it is possible to evaluate the visibility time (in term of cumulative distribu-tion and average value) and the amount of data transferred between the network elements. The hybrid configuration can include more LEO satellites and more GEO satellites (interconnected through IOL) ac-cording to the service and traffic requirements.

The tool is integrated in the network emulation platform.

Link budget tool Realized in Matlab is able toperform a multi-dimensionalsatellite link budget for tran-sponders (transparent andregenerative) operating in K(Ku/Ka) and EHF band fordifferent communication sat-ellite scenarios (TV broad-casting, telemedicine, emer-gency scenarios, and othersscenarios).

The LBT is able to be integrated into a confederation of simulators, such as STK (Satellite Tool Kit) tool, Satellite Network Emulator Platform, and external propagation models to realize a complex link budget calculator.

Considering a propagation model as external software, the output can be the antenna temperature and/or the total attenuation evaluated on the basis of the ITU models implemented in the own external software. These inputs drive the LBT to perform its functionality, to obtain link budget results. It is possi-ble to manage the LBT functionalities, thanks to a graphical user interface.

SatCom Emulator: description • Design and realization of PC/Linux based emulation platform• Real time operation• Star/mesh topology• Centralized control/management• Interfaced with real networks (Internet, WiFi, GSM, WiMax, etc.)• Interconnection with other test beds

• DVB- RCS2 access scheme has been implemented as core functionality of NS2 (satlink.cc)• Combinations of CRA, RBDC and VBDC or Random Access request schemes are available• Capacity: 2Mbit/s for Return and 10 Mbit/s for the Forward Link• TCP- Newreno is used as transport protocol over the satellite link

Communication • Broadband mesh or star architecture• Simulation of narrow band and LEO links• Real IPv4/6 for uni-multicast/broadcast• Multiple Virtual Satellite Terminals• NAT or direct addressing of Virtual Sat Terminals• Acceleration with PEP selecting TCP versions• Fine tuning of SAT terminals profiles• Several Bandwidth Allocation Algorithms• Layer 3 (and above) security frameworks

(e.g.OpenVPN)• Connection Control Protocol C2P for resources

on demand

Error models• Quasi-Error Free (QEF) channel• Error distribution at the IP level (Ka/Ku bands)• Plug-in for custom error models and external

tools

Forward Link Characteristics• Adjustable maximum rate for broadcast channel• DiffServ profile for fwd link priority multiplexing• Multi spot support through separated subnets

Return Link Access Characteristics• Terminal login and synchronization• Fixed or variable bandwidth allocation:

• Constant (session-based pre-assignment or SCPC)• Dynamic (superframe-based BoD/DAMA)

• DiffServ to MAC mapping for fine-tuned QoS

External Interfaces• Web configuration and test execution GUIs• Real time probes for system monitoring• IP tunnel endpoints for remote connectivity to

other testbeds• VLAN switch for HW and 3rd parties testbeds

local interconnections• XML over TCP interface for configuration

and scenario updates

Page 12: Multimedia Satellite Telecommunications Group ... - …tlcsat.uniroma2.it/wp-content/uploads/2011/10/Brochure_online.pdf · Multimedia Satellite Telecommunications Group Prof. Michele

Multimedia SatelliteTelecommunications

Group

Prof. Michele LuglioIng. Cesare Roseti

Ing. Francesco Zampognaro

www.tlcsat.uniroma2.it

Sample Emulation outputs Real Applications traffic

TCP Reno CWND

Emulator Hardware

DIEDipartimento di Ingegneria

Elettronica

Web Interface

DIEDipartimento di Ingegneria

Elettronica