1. The Coalition Peering Domain A New Entity in the Routing Landscape Manish Lad, Saleem Bhatti, Peter Kirstein, Steve Hailes Dept. Computer Science, UCL

2. 7-8 July 2005The Coalition Peering Domain2 Overview Data Rate Disparity: –Local-Area –Wide-Area Opportunity: –Community-Area Network Provision –Better-Utilise Connectivity

3. 7-8 July 2005The Coalition Peering Domain3 Community-Area Network Provision Community Networks starting to form Municipal Wireless Networks Commercial Hotspots Neighbourhood Networking Initiatives

4. 7-8 July 2005The Coalition Peering Domain4 Ad Hoc Neighbourhood Peering Ad Hoc Peering Agreement Wide-Area Capable Peer Local-Area Only Peer Wide-Area Connectivity

5. 7-8 July 2005The Coalition Peering Domain5 This is Highly Disruptive Ad Hoc Peering NATing and Tunnelling Static Connection Sharing Lack of Load Balancing “Experts only”

6. 7-8 July 2005The Coalition Peering Domain6 Our Solution: Add Structure to the Ad Hoc Peering Encourage Collaboration Among Peers Maintain Local Control and Dynamism Coalition-Based Architecture –Collaboration Between Individuals –For Joint Action or Mutual Benefit

7. 7-8 July 2005The Coalition Peering Domain7 Connectivity Aggregation High Potential Wide-Area Data Rate –Many Coalition Members – Many Coalition Egress Links Spray Egress Traffic Across All Wide-Area Links –Using Higher Data Rate Local-Area Links –Aggregate Wide-Area Connectivity

8. 7-8 July 2005The Coalition Peering Domain8 Coalition Peering Domain (CPD) Architecture Local Peering Agreement Coalition-Edge Forwarder (CEF) Coalition-Internal Forwarder (CIF)

9. 7-8 July 2005The Coalition Peering Domain9 CPD-Edge Egress Aggregation P1 P3 P2, P4, P5 P5 P4 P5 P2 P3 P4

10. 7-8 July 2005The Coalition Peering Domain10 Benefit for Internal Members

11. 7-8 July 2005The Coalition Peering Domain11 Spraying Across CPD Edge P1 P3 P2, P4, P5 P5 P4 P5 P2 P3 P4

12. 7-8 July 2005The Coalition Peering Domain12 Can We Use Existing Methods? Single Administrative Domain? –NO BGP –Requires Expertise –Heavy-Weight –Back Pressure on Core Network Ad Hoc Routing –Single-Path Source-To-Destination –Single Administrative Domain

13. 7-8 July 2005The Coalition Peering Domain13 Challenges Still Disruptive Routing –Multiple Source-To-Destination Paths –Implications for Higher Layer Protocols Addressing –Centralised Function – Distributed System Trust –Onward Forwarding –Policy

14. 7-8 July 2005The Coalition Peering Domain14 Applications Beyond Neighbourhoods Highly Survivable Networks –Robustness Through Multi-Homing Sensor Networks –Requiring Multiple Distributed Edge Nodes Emergency and Disaster Scenarios –Relief Team — Non-Technical Users Heterogeneous Wide-Area Connectivity Delay-Tolerant Applications

15. 7-8 July 2005The Coalition Peering Domain15 Future Possibilities Inter-CPD Communication –Routing Emerging Opportunities –Localised Service Provision

16. 7-8 July 2005The Coalition Peering Domain16 Summary Local-Area Peering is Happening Missing Opportunities Manage Available Resources Dynamically Diverse set of Scenarios

17. Questions?

18. Additional Slides

19. 7-8 July 2005The Coalition Peering Domain19 Wireless London Study “Air Stumbling” Experiment in a Light Aircraft –Directional antenna –GPS –Laptop running Netstumbler Results –1525 nodes seen –50% were “open” –approx. 40% running factory default SSID settings Julian Priest - The State of Wireless London http://informal.org.uk/people/julian/publications/the_state_of_wireless_london/

20. 7-8 July 2005The Coalition Peering Domain20 Coalition: English Definition A coalition is defined as*: –a : the act of coalescing : UNION b : a body formed by the coalescing of orig. distinct elements : COMBINATION –a temporary alliance of distinct parties, persons, or states for joint action * Merriam-Webster Dictionary Online - http://www.m-w.com/

21. 7-8 July 2005The Coalition Peering Domain21 Neighbourhood Networking Initiatives Which initiatives exist at the moment? –consume.net http://consume.net/ –CUWiN http://www.cuwireless.net/ –Stockholm Open http://www.stockholmopen.net/ –FreeNetworks Affiliations http://scoop.freenetworks.org/

22. 7-8 July 2005The Coalition Peering Domain22 Keywords Community Neighbourhood Collaboration Aggregation Multi-Homing Load-Balancing Robustness Routing & Addressing Policy Disruptive Multi-Path src-to-dst Self-Organising AD Administrative Responsibility Distributed