1. Linking City Networks, CSD 1 LINKING CITY NETWORKS Midterm Presentation Team 14 http://csd.ssvl.kth.se/~csd2004-team14/ CSD Project KTH, Stockholm 22 nd March, 2004

2. Linking City Networks, CSD 2 ABSTRACT Multiple islands of broadband networks in Stockholm with structural similarities but differences in technical solutions and business models. Single islands often too small to support multiple services. We want to create a dynamic open market for service providers by linking city access networks. This will p rovide end users with more options and greater value in terms of service providers and costs. How? New use of existing local internet exchanges for connecting city access networks. Linking City Networks

3. Linking City Networks, CSD 3 GOALS Analyze present access network business models and technical characteristics of the networks. Propose a solution that fits with existing business models and propose guidelines for necessary agreements. Identify technical compatibility and identify possible schemes for linking the networks. Identify possibilities to distribute and manage local services (sharing between network local services). Linking City Networks

4. LocationNetwork Owner Communication Operator Service Provider (example) Vällingby Sollentuna KistaIP 1 KistaIP 2 Akalla Husby AHN MAJOR PLAYERS INVOLVED Linking City Networks

5. Linking City Networks, CSD 5 BENEFITS Network Owners - Important factor in marketing new apartments. Communication Operators - Higher penetration of service providers. Service Providers - Increased customer base. End Users - More choices with lower cost and higher service quality. Linking City Networks

6. Linking City Networks, CSD 6 TECHNICAL ANALYSIS PlaceTechnical FeaturesKey Equipment VällingbyLayer2&3 Central router: Cisco 7600 Switch: Cisco 3550 SollentunaLayer2, VLAN, Local Service Central switch: Extreme 6808 Switch: HP, 3Com KistaIP 1Layer2, VLANHP switch KistaIP 2Layer3, RoutingPacketfront ASR routers Akalla HusbyLayer2, VLAN Central node:ALCATEL 7800 Switch: Alcatel 5022 Technology and Key Equipment: Linking City Networks

7. Linking City Networks, CSD 7 BUSINESS ANALYSIS  Time frame of about five years.  Business model fit.  Risk and pricing.  Need for basic coordination.  Keep overheads at a minimum.  Neutrality is essential. Linking City Networks Critical Aspects:

8. Linking City Networks, CSD 8 BUSINESS ANALYSIS How can a deal be made between different operators, with different services, without putting a new cost structure on the operators? What is the required critical mass (in terms of end- users) to support multiple operators and ISPs? Linking City Networks Key Questions In A Multi-Operator Network:

9. Linking City Networks, CSD 9 FIRST SCENARIO All networks are connected to their neighbors forming a ring (“ring topology”). Linking City Networks KISTA IP 1 KISTA IP 2 SOLLENTUNA VÄLLINGBY AKALLA HUSBY

10. Linking City Networks, CSD 10 SECOND SCENARIO Linking City Networks The networks and the service providers connected to a central exchange point (“star topology”). KISTA IP 1 KISTA IP 2 SOLLENTUNA VÄLLINGBY AKALLA HUSBY ?

11. Linking City Networks, CSD 11 Star topology with SOLIX at the center of the star. All the networks should join SOLIX directly. ISPs could connect directly to SOLIX or through their current networks’ connection to SOLIX. Fits nicely with current business models. Defines clear responsibilities for each player involved. Kista IP I & II will be used as a test-bed for this solution. Linking City Networks PROPOSED SOLUTION

12. Linking City Networks, CSD 12 Stockholm Open Local Internet Exchange. Based on Gigabit Ethernet connections between four points of presence. Non-profit (cost recovery) philosophy. Linking City Networks SOLIX Kista, KTH Solna, Utfors Solna, Song Networks Norrmalm, Lidero Network

13. Linking City Networks, CSD 13 Star topology with SOLIX at the center of the star. All the networks should join SOLIX directly. ISPs could connect directly to SOLIX or through their current networks’ connection to SOLIX. Fits nicely with current business models. Defines clear responsibilities for each player involved. Kista IP I & II will be used as a test-bed for this solution. Linking City Networks PROPOSED SOLUTION

14. Linking City Networks, CSD 14 PROPOSED SOLUTION

15. Linking City Networks, CSD 15 FUTURE WORK Linking City Networks Implementation of the solution using the test-bed. Investigation of possibilities of distributing local services in the networks. Investigation of possible extension of SOLIX to include more points of presence. Case study of critical mass requirements from a service provider perspective.

16. Linking City Networks, CSD 16 QUESTIONS Linking City Networks ?

17. Linking City Networks, CSD 17 LINKING CITY NETWORKS Linking City Networks Thanks! http://csd.ssvl.kth.se/~csd2004-team14/