delay tolerance in a network of information
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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. DTN Community: We have come a long way. Interplanetary Networking Networking the orbit, solar system, universe DTN Architecture and Bundle Protocol - PowerPoint PPT PresentationTRANSCRIPT
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Delay Tolerance in aNetwork of Information
Dirk Kutscher – NEC Labs
SAIL Project Consortium
DTNRG Meeting @ IETF-782010-07-30
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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
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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
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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:
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Applications Beyond Research?
• Opportunistic social networking
• DTN Concepts for mobile communication services?– Augmenting wireless infrastructure– Improving quality of experience– Enabling reduced operation (energy saving…)
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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…
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An Inconvenient Prospect
Cisco Forecasts 3.6 Exabytes per Month of Mobile Data Traffic by 2014
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Drivers for Mobile Data Traffic Growth
Video Will Account for 66 Percent of Global Mobile Data Traffic by 2014
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Problems• Revenue does not keep up with traffic increase
Mobile industry is looking for solutions NOW…
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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
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Step 2: Content Caches at the Edge
Content Servers
PDN Gateways /edge caches
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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
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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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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
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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
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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 ;-)