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

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Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30
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Page 1: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

Delay Tolerance in aNetwork of Information

Dirk Kutscher – NEC Labs

SAIL Project Consortium

DTNRG Meeting @ IETF-782010-07-30

Page 2: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

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

Page 3: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

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

Page 4: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

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 ContentBundle

SubscribeRequest

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:

Page 5: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

Applications Beyond Research?

• Opportunistic social networking

• DTN Concepts for mobile communication services?– Augmenting wireless infrastructure– Improving quality of experience– Enabling reduced operation (energy saving…)

Page 6: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

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…

Page 7: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

An Inconvenient Prospect

Cisco Forecasts 3.6 Exabytes per Month of Mobile Data Traffic by 2014

Page 8: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

Drivers for Mobile Data Traffic Growth

Video Will Account for 66 Percent of Global Mobile Data Traffic by 2014

Page 9: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

Problems• Revenue does not keep up with traffic increase

Mobile industry is looking for solutions NOW…

Page 10: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

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

Gateway (NAT enabled)

L-PGW

MME

SGW PGW

Backhaul

192.168.1.1

192.168.1.10

IP to Backhaul: 222.2.2. 2 SeGW

HeNB

IPSec

IPSec

IPSec

SIPTO Traffic

Page 11: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

Step 2: Content Caches at the Edge

Content Servers

PDN Gateways /edge caches

Page 12: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

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

StandardProtocol

P2P ProtocolsP2P Peer P2P Peer

Storage

P2P Peer

Page 13: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

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

Page 14: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.
Page 15: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

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

Page 16: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

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

Page 17: Delay Tolerance in a Network of Information Dirk Kutscher – NEC Labs SAIL Project Consortium DTNRG Meeting @ IETF-78 2010-07-30.

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

http://www.sail-project.eu/

Don’t use before Aug 1 st ;-)


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