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The Singapore Advanced Research & Education Network

SingAREN21. The Singapore Advanced Research & Education Network. Outline. Funding Agency & Partners Objective Network Infrastructure Broadband R&D Projects Optical Network Project Distance Education Future Projects. Nanyang Technological University. Temasek Polytechnic.

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The Singapore Advanced Research & Education Network

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  1. SingAREN21 The Singapore Advanced Research & Education Network

  2. Outline • Funding Agency & Partners • Objective • Network Infrastructure • Broadband R&D Projects • Optical Network Project • Distance Education • Future Projects

  3. Nanyang Technological University Temasek Polytechnic Kent Ridge Digital Labs (New name Laboratories for Information Technology) Funding Agency & Partners Fundedby : Hosted by : Project Partners :

  4. Objectives • To provide an advanced high-speed network infrastructure, and an environment for R&D collaboration and experimentation in broadband networking so as to prepare Singapore for the next wave of Internet (Internet 2) technologies and applications deployment locally • To act as an interface for the R&E organisations in Singapore and the global Internet2 community • Train manpower to fuel the growth of the ICT industry in Singapore • Transfer technology and know-how on network advanced protocols and applications e.g., IPv6, QoS, Multicast, Distance Education etc., which SingAREN has harnessed to industry • Provide technical expertise on broadband communication issues for national projects and industry

  5. Background • Phase 1 – started in November 1997 and essentially completed in March 2001 • Phase 2 – initiated in April 2001 with 2-year grant with aim to: • Ensure continuity of R&E advance networking requirements – SingAREN21 infrastructure • More diverse R&D activities and improved project management – Broadband21 projects

  6. Network Infrastructure

  7. SingAREN21 Network Configuration

  8. Network Configuration Research Institutes: -KRDL Korea -IHPC -DSO • ILS bandwidth of 10 Mbps (CBR) and 17 Mbps (VBR-nrt) • SingAREN has a PoP in San Jose to aggregate all its US traffic • PoP provides control over the amount and type of in-bound traffic entering SingAREN’s 27Mbps international link • US local connections to StarTAP & Abilene at 45 Mbps & 155 Mbps respectively Abilene 2M 155M Singapore 155M ONE Universities : 10M (CBR) -NUS 17M (VBR-nrt) 45M -NTU Fore ASX 1000 Cisco LS1010 -SMU -NIE StarTAP Polytechnics - Temasek Poly - Ngee Ann Poly Cisco 7513 - Nanyang Poly Cisco 7507 San Jose PoP Singapore PoP

  9. Network Utilization • Singapore-US link • Singapore-Korea link

  10. R&D Projects

  11. Network R&D Projects • 10 Network Related Projects • Service Creation in Broadband & Wireless N/W • Multi-protocol Lambda Switching for Optical N/W • Managing DiffServ on QBONE • Measurement-based Admission Ctrl for DiffServ • Process-Oriented Simulation for Hi-speed Network • TDMA-based Satellite Network • Multicast QoS • QoS Routing Protocol • Advanced Internet POP Architecture & Services • End-to-End performance of Transport Protocols

  12. End-to-End Performance Project • To investigate into the end-to-end performance of the TCP/IP protocol in different scenarios which include long distance terrestrial link, satellite link, and last mile wireless links and to come up with mechanisms/solutions to improve the performance of TCP/IP. • To study the Fairness issues in allocating BW for last mile wireless links. • To investigate and to develop diagnostic and performance monitoring tools that would provide mechanisms for estimating and improving the end-to-end performance of TCP sessions.

  13. TCP Tunnels • TCP tunnel is TCP circuit, carrying IP frames over the Internet • Benefit from the congestion control mechanism of TCP/IP • Protecting TCP flows from unresponsive UDP flows • Tries to avoid congestion collapse • Protection from IP fragmentation • Suitable for adoption on edge router LCN 2000 SCI 2001 Computer Networks (to appear)

  14. TCP HACK – A Mechanism to Improve the performance of TCP • TCP performs poorly when corruption occurs • Reduces sending rate, timeouts and slow start • Wrong behaviour !! • Correct behaviour • Send multiple copies of packet • Keep sending rate the same • TCP HACK rationale and how it works • Incorporate a HeAder ChecKsum • Shown significant increase in performance TCP HACK INFOCOM 2001

  15. Study on the effectiveness of TCP SACK, HACK and TCP Trunk over Satellite Links Performance Improvement related to Satellite ICC 2002

  16. Results • Our study on the effect of varying the TCP window size over long latency link for New Reno, SACK, HACK and TCP Trunk implementations show that increasing window size does improve the performance, but only up to a certain value of the window size, and a further increase actually reduces the performance. • We also found out that SACK enabled TCP Trunk across the satellite link edge routers can improve the throughput regardless of the end host TCP implementation. • Disabling the link layer CRC and instead implementing the HACK extension to the TCP (and of course HACK+ SACK) can improve the throughput further.

  17. Global IPv4 IPv4 DNS Address Pool Server Border Router IPv6-only Router (Dual stack) IPv6 IPv4 Network Network DNS Proxy IPv6-only Router IPv6-only Router IPv6 <-> IPv4 address mapping table IPv4 Host C IPv6 node B Private (Dual stack) DNS Server DTTS – Dynamic Tunneling Transition Solution(An IPv4 to IPv6 transition mechanism)Ref: DTTS – ICCCN 2001 Address Allocation Server IPv6 node A (Dual stack)

  18. Application R&D Projects • 7 Application Projects • Digital Library Infrastructure for Distributed Geospatial Data • Distributed Simulation: Scalability, Interoperability and Application • High speed Information Retrieval, Processing & Management • Distributed E-Commerce Agents on High Speed Networks • Highly Scalable Video Codec • Virtual Reality Interface for Web-based Remote Experimentation • Packet Voice over Non-QoS Network

  19. iVCnet V2 • To promote the use of Video-conference facilities • To support APAN in the use of VC services • To track the progress of VC standards • Multipoint communication • True H.323 • Link to other directory service • Recording of conference • Webcasting of conference

  20. Optical Network Project

  21. From IP-Over-Glass Testbed… … to Full Optical Internet

  22. National University of Singapore SingTel Nanyang Optical Orchard MUX/ Technological DEMUX Exchange University Optical Optical MUX/ MUX/ DEMUX DEMUX Optical MUX/ DEMUX SPRINGi DPT Rings (622 Mbits/sec x2) KRDL

  23. Kent Ridge Advanced Network • Campus-wide optical network testbed for grid technologies and research • Inter-faculty, research institute collaborative R&D • 18-month project focus on: • optical networking, layer-2 networking • grid computing middleware • Network vendor participation

  24. Distance Education

  25. Distance LearningSingapore-MIT Alliance (SMA) Program • Launched in July 1999 • A very selective Master/Ph.D. joint program • Involves National University of Singapore (NUS), Nanyang Technological University (NTU) & MIT • Students undergo initial orientation in Singapore, then 1 month in MIT followed by continuation of program in Singapore. • Students earn single degree with indigenous registered institution • 5 programs totaling over 100 conferencing hours/week

  26. SMA DE Connectivity (cont.) 137.132.2.98 NUS SingNet 137.132.4.2 NUS One Arm Router R SingAREN (SG POP) 202.8.94.1 202.8.94.50 Firewall CC1ATM GW R 137.132.2.3 NUS R 178.18.163.66 NUS 137.132.21.134 NUS PT210 NUS MIT Layer 3 Route Internet II Abilene R MIT SingAREN (SJ PoP) 202.8.94.30 198.32.8.2 198.32.8.14 198.32.8.6 198.32.8.26 198.32.8.30 18.39.0.145 MIT PT210 192.5.89.101 192.5.89.10 18.168.0.14

  27. SMA DE Connectivity NUS Classroom OC-3 NUS Gateway SingAREN* GigaPoP 27 Mbps ILC MIT Classroom Abilene MIT Gateway SJ PoP 155 Mbps

  28. Application Sharing via Internet 2 ISDN Audio / Video Conferencing Internet 2 Student access via web for revision Online digitization onto video server Video Server SMA Synchronous Delivery MIT Auditorium NUS / NTU Auditoriumor SMART Classroom View video

  29. Future Directions

  30. Future Directions • Role of SingAREN as R&E network service provider • Rising need for R&E bandwidth – cheaper bandwidth? • Separation of experimental facility from more reliable production facility • Activities in life sciences will significantly increase demand for bandwidth • Challenges and opportunities for optical networks • Challenges and opportunities with seamless wireless connectivity

  31. www.singaren.net.sg Tel: (65) 68746630

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