Transcript Delay Tolerant Networks of Information

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
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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
Many Uses
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Designed for Space Communication
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Application Areas
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Opportunistic (social) networking
Vehicular networking
Habitat monitoring
Infrastructure-less (-reduced) communication services
Research Topics
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but not limited to that
Routing in disruption-prone environments, considering time dimension
Applications for message-oriented architectures
Self-organized content distribution
Addressing and naming
Applications
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Information-kiosks for developing countries
Publish-subscribe based content distribution
Web over DTN
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
Channel: weather/hazards
 Based on local replication decisions
 Taking limited resources (storage, bandwidth) into account
Content
Bundle
Channel: weather/travel
Source: forecast
Node
 Not requiring global knowledge about the network
 Instead: Relying on Publish-Subscribe model
 Leveraging information about subscriptions (e.g., receiver interest)
Contact
Subscribe
Request
Subscriber
 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
Applications Beyond Research?
• Opportunistic social networking
• DTN Concepts for mobile communication
services?
– Augmenting wireless infrastructure
– Improving quality of experience
– Enabling reduced operation (energy saving…)
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…
An Inconvenient Prospect
Cisco Forecasts 3.6 Exabytes per Month of Mobile Data Traffic by 2014
Drivers for Mobile Data Traffic Growth
Video Will Account for 66 Percent of Global Mobile Data Traffic by 2014
Problems
• Revenue does not keep up with traffic increase
Mobile industry is looking for solutions NOW…
Example: Architectural Changes in 3GPP
MME
Backhaul
IP to Backhaul: 222.2.2. 2
SeGW
Gateway (NAT enabled)
192.168.1.1
IPSec
SIPTO Traffic
SGW
PGW
IPSec
L-PGW
IPSec
HeNB
192.168.1.10
• Step 1: Offloading high-volume traffic via local break-out points
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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
Step 2: Content Caches at the Edge
Content Servers
PDN Gateways /
edge caches
• IETF ALTO
IETF ALTO and DECADE
ALTO Client
(Peer)
– Application Layer Traffic
Optimization
– Help P2P clients to better
select peers for requested
content
– Motivation: operator cost
reduction
ALTO Server
ALTO Protocol
ALTO
Client
(Tracker)
P2P Peer
• IETF DECADE
– DECoupled Application Data
Enroute
– Access in-network storage
– Motivation: P2P efficiency
Storage
Standard
Protocol
P2P Protocols
P2P Peer
P2P Peer
Trends
• Imminent traffic volume explosion
– Video distribution as (literally) a killer application
– Resource management issues unsolved today
• Information-centric concepts are proliferating
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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
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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
Upcoming Activities
• Take information-centric networking to the next level
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General-purpose information-centric architecture
… scalable to global deployment
…Beyond content distribution
… with inbuilt delay tolerance
• Applicable to specific scenarios
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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
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
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/