IP Networking projects in the IP Networking projects in the European Space Agency European Space Agency Frank.Zeppenfeldt Zeppenfeldt@ @esa esa. .int int Frank. Frank.Zeppenfeldt@esa.int 1 1
ESA Member States and Establishments ESA Member States and Establishments ESA Member States and Establishments • Kiruna Kiruna ESTEC ( (Noordwijk Noordwijk) ) ESTEC Establishments Establishments Offices Offices ESA Ground Stations ESA Ground Stations Redu Redu Brussels Brussels Ground Stations used by ESA Ground Stations used by ESA EAC (Cologne) EAC (Cologne) ESA HQ ESA HQ (Paris) (Paris) ESOC (Darmstadt) (Darmstadt) ESOC Toulouse Ariane Ariane Downrange Stations Downrange Stations Toulouse Villafranca Villafranca ESRIN (Frascati) (Frascati) ESRIN Fucino Fucino CDN Moscow Washington Maspalomas Maspalomas Houston Libreville Houston Natal Natal Malindi Kourou Kourou Ascension Ascension Perth Perth 2 2
ESA Telecom ESA Telecom ESA Telecom • ESA Telecommunications funds via different programs: ESA Telecommunications funds via different programs: • Research into satellite communications system Research into satellite communications system • • Prototyping and development of elements of Prototyping and development of elements of satcom satcom systems (user systems (user • terminals, network, space segment) terminals, network, space segment) • Roll • Roll- -out of new services using satellite communications, e.g.: out of new services using satellite communications, e.g.: •Interactive television Interactive television • •Content delivery networks Content delivery networks • •MHP MHP • •MediaSpace • MediaSpace •Telemedicine in Telemedicine in Bagdad Bagdad • •… … • 3 3
Presentation overview Presentation overview Presentation overview Summary of on- -going and future network related ESA going and future network related ESA Summary of on projects addressing: projects addressing: • Satellite architectures and their impact on networking Satellite architectures and their impact on networking • • Link Link- -layer issues and IPv6 layer issues and IPv6 • • Multicast and service announcements Multicast and service announcements • • QoS • QoS • PEPs PEPs • • Security Security • All in their satellite specific context… All in their satellite specific context… 4 4
New satellite architectures New satellite architectures New satellite architectures • More & more satellite networks allow for bi More & more satellite networks allow for bi- -directional directional • communications via satellite (DVB- -S/DVB S/DVB- -RCS) RCS) communications via satellite (DVB • Newer satellite architectures propose a “bridge” or “MPE router” Newer satellite architectures propose a “bridge” or “MPE router” • on- -board board on • Research for on Research for on- -board switching satellites stimulated by ESA board switching satellites stimulated by ESA • since long since long 5 5
Routing on board: AMERHIS Routing on board: AMERHIS Routing on board: AMERHIS Co- -funded project will demonstrate this technology on a funded project will demonstrate this technology on a Co commercial satellite as a piggy- -back payload back payload commercial satellite as a piggy DVB-RCS DVB-S DVB-S DVB-S DVB-S DVB-S AMERHIS DVB-RCS Transparent Transparent Regenerative Cross-Connected Multi-Spot 6 6
Routing on board: AMERHIS Routing on board: AMERHIS Routing on board: AMERHIS Network of AMERHIS Network of AMERHIS Gateway Gateway stations stations • Many user terminals Many user terminals • • Injection of user multicast for micro Injection of user multicast for micro- -broadcasters broadcasters • • Services: ISP & VPN access, LAN2LAN, Multicast, Services: ISP & VPN access, LAN2LAN, Multicast, QoS QoS. . • • Fully compatible with DVB Fully compatible with DVB- -S and DVB S and DVB- -RCS RCS • 7 7
Multicast Multicast Multicast Multicast is inherent to satellite communications: Multicast is inherent to satellite communications: • Currently, multicast = broadcast • Currently, multicast = broadcast • New satellites with multiple spot beams do only multicast in are • New satellites with multiple spot beams do only multicast in areas where as where there are members there are members • Satellite topology is something in between a broadcast, UDLR, NB • Satellite topology is something in between a broadcast, UDLR, NBMA or MA or P2P P2P Missing elements for seamless satellite IP multicast are: Missing elements for seamless satellite IP multicast are: • Service announcements (SDP/SAP is not enough in large flat netwo • Service announcements (SDP/SAP is not enough in large flat networks, rks, integration with DVB information is required) integration with DVB information is required) • Adaptation of IGMP • Adaptation of IGMP proxying proxying timers/rebroadcast of IGMP reports timers/rebroadcast of IGMP reports • Special placement of PIM RP to avoid double hops • Special placement of PIM RP to avoid double hops • Integration with the satellite on • Integration with the satellite on- -board routing capability board routing capability (like PIM- (like PIM -SP Join’s linked to ATM Add SP Join’s linked to ATM Add- -Party) Party) 8 8
QoS in satellite networks in satellite networks QoS QoS in satellite networks Problems for practical QoS QoS in satellite networks in satellite networks Problems for practical • Missing tools for specifying and provisioning Missing tools for specifying and provisioning QoS QoS in FW and RT in FW and RT • link link • No No MIBs MIBs (or (or PIBs PIBs) available or agreement on COPS/SNMP/other ) available or agreement on COPS/SNMP/other • interface for provisioning interface for provisioning • No Cookbook for doing e.g. Voice over IP No Cookbook for doing e.g. Voice over IP • • No guidelines for mapping Internet No guidelines for mapping Internet QoS QoS on e.g. DVB on e.g. DVB- -RCS RCS • Capacity Allocations ( ( or DSCP handling, queuing Capacity Allocations or DSCP handling, queuing – – policing policing – –shaping shaping ) /DAMA functionality ) recommendations related to channels/RBDC/VPNs recommendations related to channels/RBDC/ VPNs/DAMA functionality Two ESA studies: Two ESA studies: • QoS • QoS in FW link for a DVB in FW link for a DVB- -S Gateway S Gateway • Integrated QoS QoS Management for DVB Management for DVB- -RCS networks RCS networks • Integrated 9 9
QoS in Forward Link in Forward Link QoS QoS in Forward Link ESA Study performed by VCS Engineering,Salzburg University, Critical ical ESA Study performed by VCS Engineering,Salzburg University, Crit Software: Software: • methods to methods to provision provision QoS QoS based on based on diffserv diffserv in DVB forward in DVB forward • links , including , including IPSec IPSec, multiple IP/DVB gateways , multiple IP/DVB gateways links • dynamic SLA trading dynamic SLA trading between ISPs and a Space Link Provider between ISPs and a Space Link Provider • • Architecture based on scaled Architecture based on scaled- -down down IOTP IOTP for trading and for trading and COPS COPS- - • PR / /DiffServ DiffServ for provisioning for provisioning PR • Simulation with modified ns Simulation with modified ns- -2 validated the concept 2 validated the concept • • Iteration with two Space Link Providers on requirements Iteration with two Space Link Providers on requirements • Results: Results: • development development completed and tested end 2002 completed and tested end 2002 • • implementation with Linux implementation with Linux DiffServ DiffServ in a commercial IP/DVB in a commercial IP/DVB • gateway gateway • Policy Information Base for Gateway Policy Information Base for Gateway • 10 10
QoS in Forward Link in Forward Link QoS QoS in Forward Link ISP 1 ISP 1 DiffServ Domain Domain DiffServ Service Link Provider Service Link Provider SLA trader SLA trader IOTP IOTP COPS COPS ISP 2 ISP 2 IP/DVB IP/DVB Users Users uplink uplink IOTP IOTP SLA trader SLA trader SLA trader SLA trader You have 2 Mbps Gold (EF) for me ? You have 2 Mbps Gold (EF) for me ? Yes, at 300€/hour Yes, at 300€/hour Terrestrial return Terrestrial return 11 11
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