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NOBEL WP5 Meeting Nürnberg, April 22/23, 2004

NOBEL WP5 Meeting Nürnberg, April 22/23, 2004. Workpackage 6 RFI from WP4 - Discussion. Ben Niven-Jenkins (benjamin.niven-jenkins@bt.com). RFI related questions/issues/comments. Open questions What is it WP4 are actually asking of WP6? Feedback on 3 stereotypes in RFI

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NOBEL WP5 Meeting Nürnberg, April 22/23, 2004

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  1. NOBEL WP5 MeetingNürnberg, April 22/23, 2004 Workpackage 6 RFI from WP4 - Discussion Ben Niven-Jenkins (benjamin.niven-jenkins@bt.com)

  2. RFI related questions/issues/comments • Open questions • What is it WP4 are actually asking of WP6? • Feedback on 3 stereotypes in RFI • What will a typical node look like for each scenario • WP6 comments/feedback so far • More precise switching layer definition/naming • Does LSC include both optical & electrical lambda switching? etc. • Graphical notation (more on this later) • Is strange, confusing and sometimes inconsistent • Burst layer missing (to be delivered by ASEL) • Include static switching capable nodes/NEs?

  3. RFI from WP4 - Graphical notation • To provoke debate/discussion • NOT present the answer • What graphical notation should be used? • To describe nodes • In response to WP4 RFI • Within WP6 deliverables (D9 & D24) • Choices • Standards based (G.805/G.809/G.806) • Bespoke • Others?!?

  4. G.805/G.809/G.806 • Standards based • Provide building blocks to describe networks/equipment • I.732/G.783 - Describe ATM/SDH equipment respectively • Pros • Already specified • Used & recognised by industry • Useful for Network Management too • Cons • Models could be quite complex • Lack of func arch experts in WP6/NOBEL?

  5. G.805/G.809/G.806 • Figure 12-1/G.783 - VC-n path layer atomic functions

  6. G.805/G.809/G.806 • Figure 4-3/I.732 - Detailed functional architecture of an ATM NE

  7. WP4 Suggestion • Bespoke notation • e.g that proposed by WP4 • Pros • May be simpler to those not au fait with func arch • Cons • Will need to be specified & explained • Limited time available • Considerable additional work for little added value? • Re-inventing the wheel? • Seems to rely on colour NMI-A GMPLS/ASON G.709  Client/tributaryports Network side/trunk ports

  8. References • ITU-T Recommendation G.805 (2000), Generic functional architecture of transport networks • ITU-T Recommendation G.809 (2003), Functional architecture of connectionless layer networks • ITU-T Recommendation G.806 (2004), Characteristics of transport equipment - Description methodology and generic functionality • ITU-T Recommendation G.783 (2004), Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks • ITU-T Recommendation I.732 (2000), Functional characteristics of ATM equipment • Broadband Networking, Sexton & Reid, ISBN 0-89006-578-0, Chapters 2 & 3 (& 4 for management)

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