Delay Tolerance in a Network of Information

1. Delay Tolerance in aNetwork of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-782010-07-30

2. DTN Community:We have come a long way • Interplanetary Networking • Networking the orbit, solar system, universe • DTN Architecture and Bundle Protocol • Generalized Architecture • Space communications as a customer • Bundle transport without permanent end-to-end paths • Store-and forward • Late name resolution • Custody transfer • Convergence layer concept • Routing with different levels of knowledge of network topology, offered load and connectivity graphs over time

3. Many Uses • Designed for Space Communication • but not limited to that • Application Areas • Opportunistic (social) networking • Vehicular networking • Habitat monitoring • Infrastructure-less (-reduced) communication services • Research Topics • Routing in disruption-prone environments, considering time dimension • Applications for message-oriented architectures • Self-organized content distribution • Addressing and naming • Applications • Information-kiosks for developing countries • Publish-subscribe based content distribution • Web over DTN

4. Channel: weather/hazards ContentBundle Channel: weather/travel Source: forecast Node Contact SubscribeRequest Subscriber Example: DTN Pub/Sub Protocol (DPSP)‏ • Leveraging replication-based distribution in opportunistic networking scenarios for cost-efficient and scalable content distribution • DTN Multicast distribution based on Publish-Subscribe model • Objective: reliable and timely distribution • Based on local replication decisions • Taking limited resources (storage, bandwidth) into account • Not requiring global knowledge about the network • Instead: Relying on Publish-Subscribe model • Leveraging information about subscriptions (e.g., receiver interest)‏ • Configurable bundle selection and prioritization mechanism • Select and order bundles for transmission/storage in order to meet objectives Janico Greifenberg, Dirk Kutscher;Efficient Publish/Subscribe-based Multicast for Opportunistic Networking with Self-Organized Resource Utilization;WON-2008; March 2008

5. Applications Beyond Research? • Opportunistic social networking • DTN Concepts for mobile communication services? • Augmenting wireless infrastructure • Improving quality of experience • Enabling reduced operation (energy saving…)

6. Virtual Telco View • Delay Tolerance? – go away! • We got LTE, and its going to be superfast • Ubiquitous infrastructure • Well-managed, congestion cannot happen • Cannot sell “delays” • But…

7. An Inconvenient Prospect Cisco Forecasts 3.6 Exabytes per Month of Mobile Data Traffic by 2014

8. Drivers for Mobile Data Traffic Growth Video Will Account for 66 Percent of Global Mobile Data Traffic by 2014

9. Problems • Revenue does not keep up with traffic increase • Mobile industry is looking for solutions NOW…

10. Example: Architectural Changes in 3GPP • Step 1: Offloading high-volume traffic via local break-out points • Deviating from core network tunnel concepts • Allow for local gateways “to the Internet” • Originally for femto base stations – now adopted for macro network • General trend: decentralization

11. Step 2: Content Caches at the Edge Content Servers PDN Gateways /edge caches

12. IETF ALTO and DECADE P2P Peer • IETF ALTO • Application Layer Traffic Optimization • Help P2P clients to better select peers for requested content • Motivation: operator cost reduction • IETF DECADE • DECoupled Application Data Enroute • Access in-network storage • Motivation: P2P efficiency ALTO Client (Peer) ALTO Server Storage ALTO Protocol StandardProtocol ALTO Client (Tracker) P2P Protocols P2P Peer P2P Peer

13. Trends • Imminent traffic volume explosion • Video distribution as (literally) a killer application • Resource management issues unsolved today • Information-centric concepts are proliferating • CDNs: transparent redirection of requests to topologically close servers • P2P: location-agnostic exchange of content chunks • IETF ALTO: align peer selection with network topology (operator policies) • IETF DECADE: access named content in storage servers • Machine-to-Machine Communication • Information-centric research activities • 4WARD NetInf: Information-centric networking with a flat naming scheme • CCN: Content-centric networking with a hierarchical naming scheme • PSIRP: Publish/subscribe for Internet level communication • DTN: Delay-Tolerant Networking based on Bundle protocol

15. Upcoming Activities • Take information-centric networking to the next level • General-purpose information-centric architecture • … scalable to global deployment • …Beyond content distribution • … with inbuilt delay tolerance • Applicable to specific scenarios • Considering real-world requirements and on-going developments • Mobile communication, M2M • Operator requirements • Business models, economic models • Relationship to DTN • DTN concepts for Information-centric • Network of Information based on DTN

16. Scalable and Adaptive Internet Solutions Project • EU-FP7 Integrated Project • Industry focus: major European vendors and operators • Network of Information one of three technical areas • Starts August 1st, runs for 2.5 years

17. Scalable and Adaptive Internet Solutions Project • EU-FP7 Integrated Project • Industry focus: major European vendors and operators • Network of Information one of three technical areas • Starts August 1st, runs for 2.5 years Don’t use before Aug 1st ;-) http://www.sail-project.eu/