© 2007, it - instituto de telecomunicações. Todos os direitos reservados. Beyond 2020 Content Centric Networking 50 PhD Graduates Celebration Event Aalborg, April 11, 2008 Martijn Kuipers

2 Beyond 2020 Content Centric Networking | Aalborg, April 11, 2008 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 messages). Acquiring or distributing named chunks of data is not conversation, it’s a dissemination.

3 Beyond 2020 Content Centric Networking | Aalborg, April 11, 2008 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.

4 Beyond 2020 Content Centric Networking | Aalborg, April 11, 2008 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.

5 Beyond 2020 Content Centric Networking | Aalborg, April 11, 2008 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.

6 Beyond 2020 Content Centric Networking | Aalborg, April 11, 2008 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).

7 Beyond 2020 Content Centric Networking | Aalborg, April 11, 2008 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.

8 Beyond 2020 Content Centric Networking | Aalborg, April 11, 2008 References IST-4WARD Project, project.eu Van Jacobsen, “If a Clean Slate is the solution what was the problem?”, Stanford ‘Clean Slate’ Seminar, February 27, 2006