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Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG IETF-78 2010-07-30.

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Presentation on theme: "Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG IETF-78 2010-07-30."— Presentation transcript:

1 Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG IETF

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 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 Source: forecast Channel: weather/hazards Channel: weather/travel Content Bundle Subscribe Request Subscriber Node Contact Janico Greifenberg, Dirk Kutscher; Efficient Publish/Subscribe-based Multicast for Opportunistic Networking with Self-Organized Resource Utilization; WON-2008; March 2008 Example:

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 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 Server ALTO Client (Tracker) ALTO Client (Peer) ALTO Protocol Standard Protocol P2P Protocols P2P Peer Storage 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

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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 1 st, 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 1 st, runs for 2.5 years Dont use before Aug 1 st ;-)


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