Brief look at staus of Climate Change and impacts from/into ICTs. Identify the roles of NGN to mitigate climate change and prposed new model of ntwork architecture.

1. 저탄소 차세대네트워크 기술 표준화 이 재섭 Chairman of ITU-T SG 13

6. BT networks before NGN 1. Impacts of Network into CC IP ATM PSTN DSL KStream PSTN Leased lines PDH Fibre Copper SDH access PDH access End User ~5.5k sites ~2k sites ~300 sites ~100 sites ~15 sites MSH -SDH ~1k sites SDH VC-12 PDH access SDH VC-4

7. BT Networks after the NGN 5. Case Study – 21CN 1. Impacts of Network into CC IP-MPLS-WDM DSL Fibre & Copper Copper Agg Box End User ~5.5k sites ~100 sites Class 5 Call Server Content WWW ISP Multi-service access Converged core Wireless

8. Impacts of NGN to reduce GHG in Telecom operations ~5.5k sites ~100 sites ~5.5k sites ~2k sites ~300 sites ~100 sites ~15 sites ~1k sites 30 ~ 40% Reduction of GHG Number of nodes before NGN Number of nodes after NGN Number of nodes in Access Networks # of nodes in Core Networks 1. Impacts of Network into CC

11. Key Features of Horizontal Network configuration * Ref: FGFN-C25 “Energy Saving Network Technologies”, Fujitsu Ltd, 11. 2009 2. Functional view of Network

17. Examples of energy saving points in Network Operation Energy saving by GPON * Ref: ITU-T FG on ICT&CC Deliverable 4 “Direct and Indirect Impact of ITU-T Standards” 4. Key Issues for Greening Network * Ref: FGFN-C25 “Energy Saving Network Technologies”, Fujitsu Ltd, 11. 2009 Energy saving points of Router Energy consumption of one router: 7.1 kW x 24 hours x 365 days = 62,600kWh

23. Thank you for your attention !!!