SATSIX - AbsoluteAstronomy.com

SATSIX is a demonstration of IPv6

IPv6

Internet Protocol version 6 is a version of the Internet Protocol . It is designed to succeed the Internet Protocol version 4...

integration of hybrid satellite and Wireless local loop

Wireless local loop

Wireless local loop , is a term for the use of a wireless communications link as the "last mile / first mile" connection for delivering plain old telephone service and/or broadband Internet to telecommunications customers....

(WLL) and is funded by the Sixth Framework Programme through Information Society Technologies. The project will help in the implementation of the European Space Policy

European Space Policy

A formal European Space Policy was established on 22 May 2007 when a joint and concomitant meeting at ministerial level of the Council of the European Union and the Council of the European Space Agency adopted a Resolution on the European Space Policy...

and the i2010 European Initiative. The consortium believes satellite systems can drive IPv6 implementation and deployment, providing a native solution for geographically separated users. The consortium is actively participating in the standardization activities and include Broadband Satellite Multimedia (ETSI BSM), Digital Video Broadcasting (DVB), and Internet Engineering Task Force

Internet Engineering Task Force

The Internet Engineering Task Force develops and promotes Internet standards, cooperating closely with the W3C and ISO/IEC standards bodies and dealing in particular with standards of the TCP/IP and Internet protocol suite...

(IETF).

Consortium

Thales Alenia Space
Thales Alenia Space
Thales Alenia Space is an aerospace company born after the Thales Group bought the participation of Alcatel in the two joint-ventures between Alcatel and Finmeccanica, Alcatel Alenia Space and Telespazio.-History:...

, France
Telespazio
Telespazio
Telespazio is a space systems services company, based in Rome, Italy. Telespazio was founded in 1961; however the company as it exists today was formed on July 1 2005 with the merger of the original Telespazio with the space services division of Alcatel...

(TPZ), Italy
CNRS/LAAS (LAAS), France
Sapienza University of Rome, Italy
SINTEF
SINTEF
SINTEF , headquartered in Trondheim, Norway, is the largest independent research organisation in Scandinavia. Every year, SINTEF supports research and development at 2,000 or so Norwegian and overseas companies via its research and development activity....

(STI), Norway
University of Surrey
University of Surrey
The University of Surrey is a university located within the county town of Guildford, Surrey in the South East of England. It received its charter on 9 September 1966, and was previously situated near Battersea Park in south-west London. The institution was known as Battersea College of Technology...

, United Kingdom
University of Aberdeen
University of Aberdeen
The University of Aberdeen, an ancient university founded in 1495, in Aberdeen, Scotland, is a British university. It is the third oldest university in Scotland, and the fifth oldest in the United Kingdom and wider English-speaking world...

(UoA), United Kingdom
Telefónica
Telefónica
Telefónica, S.A. is a Spanish broadband and telecommunications provider in Europe and Latin America. Operating globally, it is the third largest provider in the world...

I+D (TID), Spain
Alcatel Alenia Space Espana (AASE), Spain
B2I (B2I), France
Systek (STK), United Kingdom
Hispasat
Hispasat
Hispasat is a group of Spanish communication satellites . They were developed by the Instituto Nacional de Técnica Aeroespacial and the European Space Agency...

SA (HAS), Spain
University of Vallodolid (UVA), Spain
Hungaro Digitel Plc (HDT), Hungary

Goals

The project has two goals

1. Lower broadband satellite access costs by development of new satellite access techniques and integrating with wireless local loop
Wireless local loop
Wireless local loop , is a term for the use of a wireless communications link as the "last mile / first mile" connection for delivering plain old telephone service and/or broadband Internet to telecommunications customers....

(WiFi
WIFI
WIFI is a radio station broadcasting a brokered format. Licensed to Florence, New Jersey, USA, the station is currently operated by Florence Broadcasting Partners, LLC.This station was previously owned by Real Life Broadcasting...

and WiMax
WiMAX
WiMAX is a communication technology for wirelessly delivering high-speed Internet service to large geographical areas. The 2005 WiMAX revision provided bit rates up to 40 Mbit/s with the 2011 update up to 1 Gbit/s for fixed stations...

)
2. Develop recommendations, test beds, trial networks, show satellite broadband access with networks based on IPv6, and support new multimedia applications

The concept of the project will first be validated in simulation, followed by emulation, live experimentation with end-to-end applications, promoted by information dissemination and training.

Expected Results

Impact of integration of IPv6 protocol into DVB-S2/DVB-RCS
Integration of dynamic multicast service into satellite networks
Security features for satellite network applications (Key management, DRM, …)
Definition, selection and validation of header compression techniques
Integration of mobility management into satellite networks
Integration of innovative applications into satellite network
Definition of inter-networking aspects [Sat + WiFi, Sat + WiMax, …]
Definition of hybrid satellite systems [OBP + Transparent payload]
Integration of innovative applications into satellite networks
Definition of QoS for different scenarios
Critical path validation through emulated and live test beds
Provide recommendation to standardization bodies

Scenarios

The project will leverage existing satellites in the Ku/Ka radio frequency band and will create several application perspectives of space based and terrestrial based systems.

1. Corporate applications on DVB-RCS

DVB-RCS

DVB-RCS is an acronym for Digital Video Broadcasting - Return Channel via Satellite or . It is a specification for an interactive on-demand multimedia satellite communication system formulated in 1999 by the DVB consortium....

transparent access platform – uses a DVB-RCS

DVB-RCS

star network

Multicast support
Security implementations
Mobility enhancements for telecommuters
Quality of Service
Collaborative Working
Videoconferencing
Live/Real-time encoding video and streaming

2. Collective Access Terminal on DVB-RCS

DVB-RCS

transparent access platform – sharing of satellite communications with wireless local loop (WiFi

WIFI

WIFI is a radio station broadcasting a brokered format. Licensed to Florence, New Jersey, USA, the station is currently operated by Florence Broadcasting Partners, LLC.This station was previously owned by Real Life Broadcasting...

or WiMAX

WiMAX

WiMAX is a communication technology for wirelessly delivering high-speed Internet service to large geographical areas. The 2005 WiMAX revision provided bit rates up to 40 Mbit/s with the 2011 update up to 1 Gbit/s for fixed stations...

). The WiFi and WiMAX connection to a Satellite Termineal (ST) is considered a LAN while any local loops are considered as sub_LAN and therefore all traffic must pass through a Satellite Gateway.

eGovernment
Internet Banking
E-mail
Web
Audio, video streaming
IP phone
e-Learning
Games
Tele-Medicine

3. Corporate applications on DVB-RCS

DVB-RCS

regenerative access platform - uses a DVB-RCS

DVB-RCS

mesh network

Enhanced Quality of Service and Multicast functionality
Network Address Translation
Network address translation
In computer networking, network address translation is the process of modifying IP address information in IP packet headers while in transit across a traffic routing device....

(NAT), security enhancements
Multi-conferencing, E-Learning, Video on Demand, Digital TV
Virtual Private Network
Virtual private network
A virtual private network is a network that uses primarily public telecommunication infrastructure, such as the Internet, to provide remote offices or traveling users access to a central organizational network....

(VPN)

4. Residential applications on DVB-RCS

DVB-RCS

transparent access platform – related to the goals to reach residential users and compete with solutions similar to ADSL and cable solutions with three services; Telephonic, internet, and television.

Three areas of focus for mobility include;

Discrete Mobility – The ability for a user to move from one location to another location
Continuous Mobility – The ability in a rural location
Seamless Mobility – User moving between satellite and local networks

Emulation

The project will emulate a complete DVB-RCS

DVB-RCS

/DVB-S2 satellite system and validate performance, simplicity, and usability along with access. Areas to emulate include encapsulation protocols such as DVB-RCS/DVB-S2/AAL5, Internet Protocol version 4 and 6, Quality of Service including HDLB and SIP proxies, Mobile IPv6 support, and multicasting.

Architecture

Two types of architecture were implemented, the Transparent Star and the Regenerative Mesh/Star while using IPv6/DVB-S. The WiFi and WiMAX terrestrial links access the satellite link at Return Channel Satellite Terminal (RCST).

Quality of Service (QoS)

With the hybrid networks of satellite and Wireless local loop

Wireless local loop

(WLL), proper Quality of Service (QoS) is necessary for SIP negation and the forwarding of the mobile packet streams. Currently, the mobile IP routing decision algorithms do not consider the resources such as network bandwidth and with each node change, the parameters will change.

Interaction between the Wireless local loop

Wireless local loop

(WLL) and the satellite links introduce two issues, overriding of QoS parameters previously negotiated by SIP and the second is traffic directed to a satellite node my not accept due to saturated queues.

The inclusions of mobility have significant impacts to QoS management and provisions. The mobility architecture can be based on QoS server, agent, or awareness applications alonge with enchancing SIP proxies. Recommendations included active sessions negotiating for QoS along the new route as part of handover procedures.

Protocols

Several different protocols are used in the network architectures and the consortium is involved in continued development of the standards. Several standards include MIPv6, HMIPv6, Session Initiation Protocol

Session Initiation Protocol

The Session Initiation Protocol is an IETF-defined signaling protocol widely used for controlling communication sessions such as voice and video calls over Internet Protocol . The protocol can be used for creating, modifying and terminating two-party or multiparty sessions...

(SIP), Unidirectional Lightweight Encapsulation

Unidirectional Lightweight Encapsulation

The Unidirectional Lightweight Encapsulation is a Data link layer protocol for the transportation of network layer packets over MPEG transport streams....

(ULE), Generic Stream Encapsulation

Generic Stream Encapsulation

Generic Stream Encapsulation, or GSE for short, is a Data link layer protocol defined by DVB. GSE provides means to carry packet oriented protocols, like for example IP, on top of uni-directional physical layers like e.g. DVB-S2, DVB-T2 and DVB-C2....

(GSE)

Session Initiation Protocol
Session Initiation Protocol
The Session Initiation Protocol is an IETF-defined signaling protocol widely used for controlling communication sessions such as voice and video calls over Internet Protocol . The protocol can be used for creating, modifying and terminating two-party or multiparty sessions...

(SIP)

This protocol is an application-layer signaling protocol based on a client-server architecture. User agents (UA) originate and terminate sessions. The Localization Servers (LS) locate the User Agents (UA) while the Registrar Servers (RS) provide databases in which the location of the user is stored and modified, then the Proxy Servers (PS) relay requests to another server.

ULE/DVB

The DVB standard uses the MPEG-2

MPEG-2

MPEG-2 is a standard for "the generic coding of moving pictures and associated audio information". It describes a combination of lossy video compression and lossy audio data compression methods which permit storage and transmission of movies using currently available storage media and transmission...

Transport Stream, 188 bytes plus a 4 byte header, in order to carry audio and video packetized streams.
The DVB group has several standards to encapsulate IP datagrams within the MPEG-2

MPEG-2

Transports Stream, Multiprotocol Encapsulation

Multiprotocol Encapsulation

Multiprotocol Encapsulation, or MPE for short, is a Data link layer protocol definedby DVB which has been published as part of ETSI EN 301 192...

(MPE) and Ultra Light Encapsulated (ULE). MPE header totals 8 bytes with an additional 4 byte CRC with an additional LCC/SNAP header which notifies different types of Ethernet payloads. ULE header consists of 4 bytes and the MPE ULE uses a 4 byte CRC.

Multicasting

Remote subscription - mobile node joins a multicast group via a local multicast router using a Care-of-Address instead of a Home Address.
Home Subscription - mobile node joins the group, send and receive packets from its Home Agent through bidirectional tunneling.
Multicast Listener Discovery (MLD) - mix of Remote and Home subscription where a Multicast Agent near the Home Agent network joins the multicast session on behalf of mobile node in the visiting network then forwards traffics to attached mobile nodes.

The source of this article is wikipedia, the free encyclopedia. The text of this article is licensed under the GFDL.

Consortium

Goals

Expected Results

Scenarios

Emulation

Architecture

Quality of Service (QoS)

Protocols

ULE/DVB

Multicasting

Further reading

External links