Transcript Multimedia Communications over Mobile Packet Networks

European FP6 Project:
Satellite Access Technologies: Leading
Improvements For Europe (SATLIFE)
Project IPv6 Activities
Dan He
Haitham Cruickshank
Zhili Sun
09 June 2004
Agenda
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Project Overview
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Satlife Consortium
Project Objective
Current Satellite Architectures
Project Key Issues
Contributions to Standards
SATLIFE plan for ipv6 inter-domain multicast
SATLIFE plans for transition from IPv4 to IPv6
SATLIFE Consortium(13 partners)
NERA(N)
EMS(UK)
UNIS(UK)
Alcatel (FR)
Thales B&M (FR)
TELEMAR(Brazil)
Telefonica R&D(Brazil)
SHIRON(Israel)
Project Workload 85PY in total
Hispasat(ES)
ALCATEL SP(ES)
Telefonica(ES)
DIT-UPM(ES)
INDRA(ES)
Project Objective
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Development of low cost access network DVB-RCS
systems for transparent and regenerative satellite solutions
in order to ensure the availability of broadband for all.
Amazonas Satellite:
1st multimedia OBP
Four spots:
North America,
South America,
Brazil and Europe
Launch mid-2004
High Quality Multimedia Interactive Services
Current Satellite Systems
Access Network Architectures
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DVB-RCS architecture:
 2-way multimedia
 IP based
 DVB-S forward link
 MF-TDMA return link
 MPEG segmentation
 Packet based DAMA
Satellite
On Board Processor
(cell or circuit switching )
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Regenerative Satellite architecture (RSA):
 Multi-Gateway
 Mesh: direct ST-to-ST
 On-board switching
 DVB-S downlink
 DVB-RCS uplink
Signalling link
Interactive
Network j
MNMS
LAN
Access
Network
Management
ST
ISP
Corporate
Signalling link
ST
Traffic link
ISP
NCC i
Corporate
ST
Interactive
Network i
Access
Control
functions for
Interactive
Network i
ST
ST
Project Key Issues
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QoS issues in regenerative satellites:
 Only pure physical/access layer standards (DVB-RCS). DVB-RCS is
based on IPv4 and the project has dedicated this issue
 No QoS support definition for satellite system.
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IPsec issues:
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Problems with Performance Enhancing Proxies (PEP), multicast and
NAT
Interworking issues in satellite/terrestrial integration.
Multicast issues over DiffServ/MPLS.
Network management issues:
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No MIB definitions
Contributions to standards
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Contributions to ESA SATLAB:
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Contributions to DVB Standard:
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Interoperability, ODU, IDU, installation
DVB-S2, DVB-RCS,DVB-TM, DVB-CM, DVBIPI
Contributions to ETSI-TC-SES/BSM:
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Multicast, IP, QoS, services, Addressing
SATLIFE plan for IPv6 interdomain multicast
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For SATLIFE project, IPv6 and multicast remain
areas of on-going research (IETF: draft-savolav6ops-multicast-issues-03.txt).
Due to multi-domain nature of satellite systems, global
IPv6 inter-domain multicast is impossible. There is no
way to convey information about sources between PIMSM RPs. Source-Specific Multicast could be a solution
without RPs and can be communicated out-of-band.
SSM is far from being generally implemented, much
less deployed
SATLIFE plans for transition
from IPv4 to IPv6
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The transition from IPv4 to IPv6 and co-existence of IPv4 and IPv6
is a subject of much debate (IETF: draft-savola-v6ops-transarch03.txt):
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Deployment models for IP nodes can be:
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Currently we are at the early stages of the transition
IPv4-only
Dual-stack with only IPv4 connectivity
Dual-stack with IPv4/6 connectivity
Dual-stack with only IPv6 connectivity
IPv6-only
SATLIFE project will continue to monitor the IPv6 deployment in
Europe:
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A study will be conducted on the IPv4/IPv6 transition and
interworking.
Thank you
http://www.satlife.org