Beyond 2020 Content Centric Networking

1. 50 PhD Graduates Celebration Event Aalborg, April 11, 2008 Beyond 2020Content Centric Networking Martijn Kuipers

2. Conversation & Dissemination • Today's networks exist (circuit switched and TCP/IP) to allow two entities to have a conversation. • More than 99% of today’s networks is for an entity to acquire or distribute named chunks of data (like web pages or email messages). • Acquiring or distributing named chunks of data is not conversation, it’s a dissemination. Beyond 2020 Content Centric Networking

3. Data matters ! • In a dissemination (e.g., getting a web page) the data matters but not who gives it to you. • It’s possible to disseminate via conversation and accomplish the user’s goal as a side effect but: • It’s inefficient (hotspots, poor reliability, poor utilization). • Users have to do the translation between their goal & its realization. Beyond 2020 Content Centric Networking

4. Data matters ! • Data is requested, by name, using any and all means available. • Anything that hears the request and has a valid copy of the data can respond. • The returned data is signed, and optionally secured, so its integrity & association with the name can be validated. Beyond 2020 Content Centric Networking

5. Trust the content, not the connection • Trust & data integrity are foundation of the design, not an add-on. • Trust is associated with user level objects, not abstractions like an SSL connection. • Network transacts in content, not conversations, so popular content won’t generate congestion. Beyond 2020 Content Centric Networking

6. Advantages of dissemination • Since nodes don’t need names, wireless & sensor nets can use simpler, local protocols (e.g., proximity, diffusion). • Data can be cached by any node so intermittent operation doesn’t preclude communication. • Delay is not only tolerated, it’s irrelevant. • Can use opportunistic transport (e.g., planes overhead, car-roadway-car, fellow travellers). Beyond 2020 Content Centric Networking

7. Conclusion • With IP the need to switch the “wires” is gone, but we still need to switch the data ! Dissemination would fix this. • Dissemination is already here in the form of overlays (BitTorrent p2p, Sonos mesh, Apple Rendezvous). There clearly is a need. • We need to look beyond the current way of doing things and start concentrating more on the data instead of the network. Beyond 2020 Content Centric Networking

8. References • IST-4WARD Project, http://www.4ward-project.eu • Van Jacobsen, “If a Clean Slate is the solution what was the problem?”, Stanford ‘Clean Slate’ Seminar, February 27, 2006 Beyond 2020 Content Centric Networking