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Multimedia communications with IPSOFACTO

Multimedia communications with IPSOFACTO A.Acharya,F.Griffoul,M.Ott,H.J.Stüttgen(NEC),H.Sanneck(GMD) stuttgen@ccrle.nec.de - Tel. +49 6221 905 110 NEC Europe Ltd. C&C Research Laboratories Heidelberg - Germany. Content. NEC‘s IPSOFACTO architecture Multimedia support with IPSOFACTO

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Multimedia communications with IPSOFACTO

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  1. Multimedia communications with IPSOFACTO A.Acharya,F.Griffoul,M.Ott,H.J.Stüttgen(NEC),H.Sanneck(GMD) stuttgen@ccrle.nec.de - Tel. +49 6221 905 110 NEC Europe Ltd. C&C Research Laboratories Heidelberg - Germany

  2. Content • NEC‘s IPSOFACTO architecture • Multimedia support with IPSOFACTO • RSVP over IPSOFACTO • ACTS IthACI project

  3. IP Internet connectivity defacto standard. multiple applications. routing flexibility scalability receiver-driven, heterogeneous multicast. but low performance routing ATM high-speed cell transport hardware-based. standard interface. but complex protocols end-to-end signaling. sender-driven multicast. MPOA: complexity. Why IP switching ? Combine IP routing with ATM performance

  4. IP switching by NEC: IPSOFACTO IPSwitching Over Fast Cell Transport • no ATM signaling, no ATM addresses • GSMP to control the ATM fabric. • flow driven like Ipsilon‘s IP switching. • coordination-less setup • no hop-by-hop coordination protocol. • flow based on high-level protocol semantics

  5. Routed mode: unused VC at receiver switched to router IPSOFACTO: Routed mode

  6. IPSOFACTO: Adding a switched path

  7. IPSOFACTO: Switched mode next packets are cell-switched: “route once, switch many”strategy

  8. IPSOFACTO: Flow mapping use TCP/IP “control” messages • explicit or implicit • TCP SYN/FIN, RSVP PATH/RESV, PIM Prune/Join, IGMP, ICMP. • are sent on a default control VC • they are never switched, always routed by the controller. • processed for per-flow forwarding state • add/modify/delete corresponding switched paths. • Allows for per-flow QoS extensions. Soft-state control at the IP level

  9. IPSOFACTO: Advantages and Issues • can run in parallel with standard ATM • zero overhead switched path set-up • use of protocol semantics: IP level state • potential high VC consumption • loop avoidance problem aggregation, possibly with explicit routing and VC-merge

  10. RSVP over IPSOFACTO • RSVP periodical messages: • sender-initiated PATH • RESV on reverse path • IPSOFACTO: • PATH,RESV sent on default control VC • RESV used to move switched VC to appropriate traffic class.

  11. RSVP: Switch Controller Architecture mrouted rsvpd CACd IPSOd IP IGMP GSMP ATM driver IPSOFACTO To the switch Routed VCs Port control VCs

  12. RSVP over IPSOFACTO: Review • good news • easy IP multicast mapping • RESV merge and QoS renegotiations possible • bad news • no QoS support from GSMPv1 • only a subset of reservation styles • no mpt-2-pt VC in current ATM hardware • limited receiver heterogeneity • VC space exhaustion

  13. IP-Switching Proposal (IthACI) • a third and last ACTS call was due 9/26/97 • one focus on Internet/ATM Integration • the following partners submitted a research proposal for IthACI: Internet and the ATM: Experiments Enhancements for Convergence and Integration • TC vendors: Alcatel-Bell(Belgium), Cisco(UK),NEC E (Germany) • System Integrator: Algo Systems (Greece) • Research: GMD FOKUS(Germany), IMEC (Belgium), University of Surrey(UK), ICS FORTH (Greece) Result: • IthACI was rated #1 of all IP-Switching proposals

  14. IthACI Objectives • gain field trial experience in using different IP-switching technologies as access nodes, interconnected via ATM PVCs • develop functional enhancements not yet adressed by various IP-Switching technologies: • support for multimedia communication, namely quality of service and multicast functions • integration of WAN resource management/planning • impact developing MPLS standard in the IETF

  15. IthACI Islands

  16. LAN IMEC (Gent) IPSO SW ATM WAN PVCs IPSO SW IPSO SW NEC&GMD Berlin NEC Heidelberg IPSO SW IPSO SW IPSO SW IPSO SW The „Green“ IthACI Island

  17. Summary IPSOFACTO • is NEC‘s architecture to combine ATM and IP • it is flow based and open to per flow QoS extensions • IPSOFACTO avoids using an explicit flow-setup or tag distribution protocol IthACI • a new ACTS project targeted at field trials with different IP-Switching variants for a PAN European Internet over an ATM backbone (IPSO, Tag-Sw,...) • project results are intended to impact MPLS WG • IthACI consortium is interested in participation of other European groups (like Eurescom)

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