Broadband Trial Integration ACTS AC362 - PowerPoint PPT Presentation

Title: Broadband Trial Integration ACTS AC362


1
Broadband Trial IntegrationACTS AC362

• Piotr Pacyna, Zdzislaw Papir Arturo Azcorra,
  Niels Andersen
• pacyna_at_kt.agh.edu.pl

2
Project partners

• DSC Communications
• Portugal Telecom - CET
• Polish Telecom
• Teledanmark
• Telebit Communications A/S
• Universidad Politecnica de Madrid
• University of Edinburgh
• UNI-C
• AGH Cracow University

3
Project objectives

• Verification of the level of integration of two
  quite distinct network architectures (IP, ATM)
  and the way they support quality-oriented
  application

• Search for appropriate mappings between IP layer
  QoS following IntServ model, and corresponding
  QoS parameters and QoS setup mechanisms of the ATM

• Search for viable migration paths from present
  day IPto next generation IP - IPv6

4
Technical means

• Development of IntServ QoS controlled
  networkbased on IPv6, RSVP, NHRP and ATM with
  m-cast SVCs

• Development of educational user
  applicationsemploying capability of the network
  to control QoS

• Set up of international, high speed links to
  connect broadband islands, verify design
  principles and implementation

5
Field trials
6
Testbed
7
IP and ATM - interoperation issues

• Transparent support for existing apps, protocols
  and OS
• Support for multicast
• Address resolution
• Connection oriented service
• Connectionless service
• Interworking of legacy LAN and ATM

8
QoS support

• two things required

• Individual network elements along data
  distribution paths

• Methods to communicate the requirements to
  network elements, and to convey QoS management
  information

9
IPv6 router extension

• RSVP for IPv6
• RSVP interface to PIM for m-cast reservations
• Controlled Load reservations over CBR and VBR
  SVCs
• Guaranteed Delay reservations over CBR SVCs
• Policy function for ATM SVCs

10
IP multicast in the router

• Multicast routing for IPv4/IPv6 through PIM
• Intra domain routing for multicast groups
• PIM-SM rendezvous point through election
  mechanism
• Build distribution tree for multicast group

11
RSVP and ATM key interoperation issues

• A key issue for QoS-capable IP service in an ATM
  environment is the integration of RSVP
  signalling and ATM signalling in support of the
  Integrated Services

• QoS translation

• VC management

12
Service model
SA Service Access TA Transport Access UA User
Access RG Residential Gateway NT Network
Terminator
13
Access network integration
PON Passive Optical Network ONU Optical
Network Unit OLT Opitcal Line Termination UA
User Access RG Residential Gateway SA
Service Access TA Transport
Access DSLAM Digital Subscriber Line Access
Multiplexer
ATM
14
Integrated Access to NSPsL2TP Access Aggregation
Physical
xDSL
Physica
Physical
Physical
Physical
xDSL
UA and Terminal
DSLAM
LAC
LNS
15
Integrated Access to NSPsPPP Terminated
Aggregation
ATM,802.3, FDDI, ...
Physical
xDSL
Physical
Physical
xDSL
Physical
Physical
DSLAM
BAS
UA and Terminal
Router
16
Service integration in the residential gateway
17
IP/ATM Multicast Integration
18
IP/ATM multicast integration
19
Applications in the network

• features

• point-to-point and multipoint sessions

• dynamic membership

• low / moderate / high bandwidth requirements

• symmetric / asymmetric bandwidth

• various latency bounds

20
Shared workspace

• session desktop
• chat tool
• shared text editor
• shared web browser
• shared whiteboard

21
Video conferencing tool

• m-point session support
• dynamic membership mgmt
• unicast/multicastconnections
• RSVP-aware
• being migratedto IP6 now

Picturehere
22
Audio conferencing tool

• m-point session support
• dynamic membership mgmt
• unicast/multicastconnections
• RSVP-aware
• PCM, ?-law, ADPCM, GSM

23
Video Retrieval Service

• MPEG1 SIF
• textual descriptions
• search by category / keyword

m-point session(centralized ctrl)
dynamic membership
RSVP reserv.
24
QoS requirements
25
Performance evaluation

• Traffic engineering approach - netperf

? traffic generator ? UDP, TCP ? Windows NT,
Sun Solaris, HP, ...

• Subjective quality assessment

• ? scenarios for testing ? users evaluation

26
Conclusions

• IETF IntServ Model

complete proposal for QoS IP internet,
promotes evolutionary approach,
preserves present-day IP network
well suited for medium size communities
like access networks, where
? no scaling problem,

• ? resources are scarse,

• ? per-micro-flow guarantees required

27
Conclusions

• IP6 / RSVP over ATM provides many potentials
  each protocol contributes valuable and unique
  properties each protocol imposes
  significant technical barriers

• Integrating IP, RSVP, ATM is not seamless.
  In fact it is complex.

? need for series of simplifying
assumptions
28
Conclusions

• Commercial software/hardware solutions are good
  at one thing, but poor at supporting the mix

• Pre-commercial solutions are being developed and
  improved

? the situation changes at high pace
? there is still much to be done

• IPv6 multicast applications can successfully be
  developed and tested in local
  environments