Nobel wp2 meeting
Sponsored Links
This presentation is the property of its rightful owner.
1 / 7

NOBEL WP2 Meeting PowerPoint PPT Presentation

  • Uploaded on
  • Presentation posted in: General

NOBEL WP2 Meeting. CR3 Alcatel CIT Contributions D15 results and D31 continuation Issy-les-Mlnx, 08-10.02.05. D15 main activity. Metro access study case (Milan wide area metro reference network) See reference network in section 6.1.1 Study case description section 6.2.1

Download Presentation

NOBEL WP2 Meeting

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript

Nobel wp2 meeting

NOBEL WP2 Meeting

CR3 Alcatel CIT Contributions

D15 results and D31 continuation

Issy-les-Mlnx, 08-10.02.05

NOBEL WP2 Feb 05 1

D15 main activity

D15 main activity

  • Metro access study case (Milan wide area metro reference network)

    • See reference network in section 6.1.1

    • Study case description section 6.2.1

      • Aim is to find the “optimum” solution for DSLAM traffic backhauling comparing different network archiectures

    • Solution description & Dimensioning results

      • SONET/SDH aggregation ring

      • RPR aggregation ring

      • Star Ethernet

      • Dual Bus Optical Ring Network (DBORN)

      • Dimensioning on different sub-areas comprising different numbers and size of DSLAMs

NOBEL WP2 Feb 05 2

High level view of compared solutions

High Level view of compared solutions



Star Ethernet

NOBEL WP2 Feb 05 3

High level view of compared solutions 1

High Level view of compared solutions (1)


  • Very similar to existing metro solutions, except:

    • Optical transparency via passive Optical Ethernet A/D

    • Upstream/downstream resource separation

    • Burst Mode equipment for Upstream

  • Very similar to access PONs, except:

    • Ring topology (Protection and Traffic Engineering features)

    • Up to 40km ring

    • « coloured »: WDM/CWDM capacity compatible with metro-access constraints

NOBEL WP2 Feb 05 4

Highlight of results e g ua2 8 remote dslams

Highlight of Results:e.g. UA2, 8 remote DSLAMs

  • Star Ethernet with GE i/f is efficient in terms of net capacity, not in terms of # of i/f. Upgrade less flexible

  • SONET/SDH (A/D @ STM-1, transport @2.5G): not bad in terms of # of i/f, but not efficient in Net. Capacity as no stat. Mux between nodes.

  • RPR (A/D @ GE, transport @2.5G): efficient in terms of # of i/f and net. Capacity when the total traffic is limited. Less efficient in upgrade due to the lack of transparency.

  • DBORN: more flexibility to choose transport granularity wrt A/D granularity as transparent transit. Surprisingly, 1G transport i/f seems the best trade-off in the study cases. Better support of asymmetric traffic.

NOBEL WP2 Feb 05 5

Global conclusions

Global conclusions

  • Point-to-multipoint/Multipoint-to-point solutions seems more adapted than point-to-point solutions:

    • sharing of Metro-core (Mc) Node interfaces to avoid strong threshold effects and mismatching of the node capacity with interface granularity

    • packet add/drop multiplexing between DSLAMs and of broadcasted packets for Video services allows saving transport resources

  • Optical transparency is interesting when traffic is increasing:

    • GE granularity gave better results mainly due to the asymmetry of the traffic (2.5G would be fine for down but overdimensioned for up)

    • flexible out-of-the-line optical interfaces to allows efficiently changing the wavelength allocation during the time for a better sharing of transport resources between the DSLAMs in the time

NOBEL WP2 Feb 05 6

Next studies continuation for d31

Next studies. Continuation for D31

  • We planned to use as much as possible the CAPEX NOBEL model for a cost comparison of the solutions

    • Most of equipment/infrastructure costs already exist in the current model. Few new costs to be considered (Burst Mode???)

  • No plan for OPEX comparisons but could be foreseen in collaboration with an interested partner

  • Improvement of dimensioning tool to be able to quickly change some network parameters and see the impact in the network comparison

    • Today, global dimensioning of DSLAM resources is automated but wavelength allocation is still done manually !!!

    • Other architectures to be considered

  • Interaction with other partners could enable to enlarge the study case and make it more interesting for the NOBEL community?



NOBEL WP2 Feb 05 7

  • Login