QUTE’98 Workshop

Heidelberg, 14-15 October 1998

Telebit Communications A/SAn independent Danish vendor of multiprotocol

routers and switches.

http://www.tbit.dk

Peder Chr. NørgaardSenior System Developer

pcn@tbit.dk

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

Two topics

The P702 demo

- something that is already working

The BTI project

- what we want to accomplish in a year or so

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

P702End-User Bandwidth on Demand

- Opportunities for Service Providers and PNOs -

- Using IPv6 and RSVP -

- as demonstrated by the P702 demonstration

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

P702 - Concept

The Concept:

D

Internet

ATM

Policy Flow spec

Cut-through Data

Signal decision

Signal data

Policy

ISDN

D

© EURESCOM

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

P702 - Concept

• End-User Bandwidth on Demand over multiple backbone technologies (P702)

• Most general voice/video/data services available with IP• Need for user-initiated multiple service levels with QoS• Integration of IP services with all backbone/trunking

technologies• Needed to make optimum use of network resources and

facilitate growth in multimedia services.– Doesn’t ADSL promise 6 Mbps to everyone ?– But how will the backbone network carry traffic ?

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

P702 - Demonstration hardware

ATM Switch

SerialLine

SerialLine

1xTBC2000/31xTBC1181xTBC1071xTBI104SWIP & SWATM

H1

1xTBC2000/31xTBC101SWIP

H2

H3

1xTBC2000/32xTBC1182xTBI1041xTBB102DSWIP & SWATM

Public switchedISDN network

ATM Line(155 Mbps)

IPv6 Router

DP1

IPv6 Router

DP3

IPv6 Router

DP2

ATM Line(155 Mbps)

Marlin 3030 Marlin 3030

1xTBC2000/31xTBC1181xTBC1071xTBI104SWIP & SWATM

Ethernet

Ethernet

Ethernet Ethernet

Ethernet

DP: Decision PointH : Host (PC or Sun SPARC)

ISDN2IPv4 Router

ISDN1IPv4 Router

The Demonstrator:

© EURESCOM

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

P702 - Concept

• Customer selects video from menu, and clicks on PLAY• Client in host signals to the server to start video

Video Select Service Select

Video 1 Default

Video 2 Bronze

Video 3 Silver

Video 4 Gold

Video 5 Platinum

PLAY

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

P702 - Concept

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

P702 - Concept

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

P702 - How it works

1) Video server starts and assigns random IPv6 flow label. This is combined with the source address => unique Flow ID

2) Client initiates RSVP sequence signalling reqd BW to server

3) Server sends RSVP PATH_MESSAGE, signalling the BW requirement to the first Decision Point (DP1).

4) PATH_MESSAGE routed using QoS Routing Table mapping BW to port no.

5) Path through network installed.

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

P702 - How it works

QOS Routing table:

Source Prefix Dest Prefix BW Interface Next HopMax Min

xxxxxxx xxxxxx 64K 8K Internet ::

xxxxxxx xxxxxx 512K 65K ISDN ::

xxxxxxx xxxxxx 1024K 513K ISDN

xxxxxxx xxxxxx 2M 1025K ISDN

xxxxxxx xxxxxx 8M 2.01M ATM ::

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

P702 - How it works

6) Client then sends reservation message back through network following the initial RSVP PATH_MESSAGE

7) Remote Decision Point then sets up connection and installs reservation

8) All subsequent packets with identical Flow ID are identified and forwarded using the Reservation Table

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

Why IPv6 ?

IPv6 QoS Advantages:• QoS becoming an issue as real time services emerge:

1) Need for lower latency and jitter, but improved tolerance to lost packets

2) Less emphasis on re-transmission of lost data

3) More emphasis on timing relationships (time-stamping)

• 20-bit Flow Label enables identification of traffic flows• Class of Service field to manage conflicts• RSVP used by routers to deal with requests

– Support of more addressing hierarchy

– Addition of anycast address to give multicast efficiencies

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

IPv6/P702 - Deployment Issues

• Could revolutionise relationship between PNO & End-User• Requires no specific link-layer technology• Facilitates new services:

– High bandwidth on demand with existing infrastructures

– Real time services (Voice/video over IP)

– Multicast services

• Options for spontaneous purchase of bandwidth• Standards based implementation• Software developed by group available for

experimentation

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

P702 demonstration Partner Profile

Consortia of 23 European Telcos(Sponsor)

University of Lancaster(Application development)

Telebit Communications A/S(Router development)

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

P702 Conclusion

• IPv6 creates new service possibilities• Link-layer independence for new services is achievable

(only appropriate bandwidth is needed !) • IPv6 already a commercial technology• Integration into Differentiated Services Internet model

desirable• P702 results (hardware and software) made available for

further development

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

Need to mature• More work on the access side• Need to include multicasting• Need to use ABR, i.e. upgrade to UNI 4.0 signalling• Need to optimize use of ATM switching - NRHP

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

THIS IS THE BTI PROJECT

Broadband Trial Integration

A project under the ACTS program

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

The partners• DSC Communications (coordinating partner)• Portugal Telecom-CET• Telekomunikacja Polska• University of Mining and Metallurgy• Teledanmark• Telebit Communications A/S• University Carlos de Madrid• University of Edinburgh• UNI-C

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

Content of BTI• Broadband residential access network• ATM backbone• Integrated services• Using IPv6, RSVP, PIM, NRHP, ATM w/ multicast SVC• Integrate in Educational Environment• Evaluation directly at the end-users (pupils, students)

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

OL

MFeeder network

ONU

APON LT ONU NT TE

OpticalDistribution Network

AT

M

AT

MServingNode

IPv6router

PHYxDSL PHYATM ATM

AAL5PDU/SDU

PON xDSLATM

SDH PONATM

SDH SDHATM

SDHATMAAL5

PDU/SDU

Qos Applic.

Protocol Stack for Data Services in the xDSL based Access Network

SDHLT

Signalling and control flows in the xDSL based Access Network

UNI 4.0ATM layer

IPv6 / RSVPIP layer

xDSL

Access Node

SDHLT

Lastdrop

Existing PVC based access networkIntegrated IP and ATM developed in the project

UNI 4.0

ContentServer

SDHATMAAL5

PDU/SDU

Qos Applic.

SDHATMAAL5

QUTE’98 Workshop

Heidelberg, 14-15 October 1998

Network Capability Schedule• November 1998

• IPv4 multicast, using CBR for controlled load service• April 1999

• UNI 4.0 signalling, using ABR for controlled load service

• IPv6 multicast• September 1999

• NHRP• Guaranteed service using CBR

• ultimo 1999, project ends