Transcript 0204_JHRyu_testbedDTN

Test-Bed for testing scenarios
of new DTN architecture
AsiaFI 2008
August, 2008
Multimedia and Mobile
Communication Lab.
Contents
Intelligent Emergency DTN Architecture
Related Test-Bed Projects
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TIER
EDIFY
Tetherless Computing
SPINDLE
Test-Bed for testing scenarios of new DTN
architecture
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Objective
Current Plan
Architecture
Preliminary Experiments
Intelligent Emergency DTN Architecture
Motivation
Other studies
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FIND: The-Day-After-Networks (UIUC)
• objective: to support survivals and to help disaster relief groups
coordinate each other
• multi-interface gateway based
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An Architectural Proposal for Future Wireless Emergency Response
Networks with Broadband Services (Bell Labs)
• objective: the rapid and reliable establishment of high-speed
communication links between rescue crews and their headquarters,
political institutions, military and police forces, and international
organizations.
• optical backbone network, portable based station, mobile gateway
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Supporting Emergency-Response by Retasking Network
Infrastructures (UIUC)
• objective: a network used by victims and rescuers to communicate
among themselves
• to use networks for emergency communications if they were originally
intended to provide a different service
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Motivation
Our Proposal
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Objective: to supports communication between
survivals and to help S.O.S messages forwarded to
rescuers
dynamic survivals network configuration
• intelligent emergency DTN backbone
• active network, software defined radio (SDR)
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Why DTN?
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integrating between heterogeneous networks
poor connectivity
distributed message storing
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Scenarios
SDR capable node
Tangshan, China earthquake, May, 12, 2008
Normal node (cellular)
Normal node (WiFi)
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Intelligent Emergency DTN
Intelligent Emergency-DTN
DTN Node
(Router, SDR capable, GPS)
3G Connection
WiFi Connection
3G Device
(SDR incapable)
DTN Node
(3G Access Point,
SDR capable)
DTN Node
(Ad hoc node,
SDR capable)
WiFi ad-hoc network
(SDR incapable)
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Intelligent Emergency DTN
Application
Reliable
Transport
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Management Module
(Active Network)
DTN Bundle
Topology Control
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Transport
Network
Neighbor Discovery
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Link Layer
PHY (Software Defined Radio)
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Scanning,
&
Frequency Adaptation
Related Test-Bed Projects
Related Projects
Reference URL : DTNRG
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http://www.dtnrg.org/wiki/Docs
TIER
TIER : Technology and Infrastructure for Emerging Regions
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University of California at Berkeley
http://tier.cs.berkeley.edu/
Objective
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the design and deployment of new technologies for
emerging regions
Project Areas
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Wireless : WiFi-based Long Distance Networks (WiLDNet)
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TierStore : Distributed Storage System and Application Framework
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Education, Healthcare, Speech, Power
EDIFY
EDIFY : Enhanced DIsruption & Fault Tolerant Bundle DeliverY
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Phase 1 Project Goals
• Designing enhanced naming scheme that can cope with
network mobility and partitions
• Designing DTN Unicast & Multicast Routing Schemes
• QoS-Based Bundle Acceptance Algorithm
• Ferry Scheduling Scheme
• Prototyping DTN Bundle Security Protocol
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Phase 2 Project Goals
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Design DTN Service Discovery Schemes
Design DTN Inter-group Unicast and Multicast Schemes
Information Assurance
Building and Experimenting with Test-Beds
Tetherless Computing
Tetherless Computing
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Smart mobile devices, such as cell phones and PDAs
opportunistically communicate with centralized server
clusters over heterogeneously administered wireless
networks
Bus-and-Kiosk Network (KioskNet: Rural Internet in Developing
Regions)
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Opportunistic Scheduling in Ferry-Based Networks
SPINDLE
SPINDLE : Survivable Policy-Influenced Networking:
Disruption-tolerance through Learning and Evolution
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Phase I: From Feb 2005 to Aug 2006
• DTN technology providing 100% delivery ratio at 20% average link
availability with 80% link utilization
– (Provide disruption-tolerant content-based access to information)
• Real Mobile Wireless setting
– Wireless connectivity, GPS, Ethernet, modem, USB
– SPINDLE system Based on DTNRG bundle layer
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Phase II: From Jul 2006 to Jan 2008
• To achieve a transitionable and evolvable, long-lived capability for
Department of Defense
– Innovative DTN technology development (~70 nodes) : Content-based
networking, routing, adaptive dissemination, late binding, and policy
– Vehicular DTN system prototype
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Test-Bed for testing scenarios
of new DTN architecture
Objective & Considerations
Objective
Building an Integrated Overlay Network of Heterogeneous
Networks based on DTN Architecture (DTNRG Bundle Protocol)
– Measuring & Improving the Performance of DTN Architecture for
the Unification of Diverse (Wireless) Networks with our Test-Bed
– (Tuning & Improve our Test-Bed for Intelligent Emergency
Networks)
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Considerations
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Considering Network Technologies
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WLAN: IEEE 802.11a/g/(pre)n
WiBro (KT WiBro)
3G HSDPA (SKT T-Login & KTF i-plug)
Wireless Mesh Network (IEEE 802.11s)
Sensor Network (ZigBee?)
DTN S/W
• DTNRG Bundle Protocol (DTN2 & DTN Applications)
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Current Plans
Phase I: Integrated Overlay Network based on DTN
Architecture (2008)
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Building DTN Test-Bed in SNU
Evaluating the Performance of Each Network Technology with DTN
Evaluating the Performance of Integrated Overlay Network based
on DTN
• Comparing TCP/IP Network (in case of DTN Scenarios)
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Improving our Test-Bed for Demo
Proposing Novel Mechanisms for Intelligent Emergency Network
• Based on Performance evaluation/analysis from our DTN Test-Bed
Phase II: Intelligent Emergency Network based on DTN
Architecture (2009)
Implementing & Evaluating our Proposed Mechanisms for
Intelligent Emergency Network
– Tuning our Test-Bed for Intelligent Emergency Network
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Test-Bed Architecture
MM-DTN Test-Bed
Internet
L2TP Tunnel
3G HSDPA/WiBro
DTN App
DTN App
DTN App
DTN App
Ethernet/WLAN
MM-DTN1
DTN App
(Src)
DTN App
DTN App
MM-DTN3
DTN App Ethernet/WLAN
MM-DTN2
DTN App
Ethernet/Mesh
Room 518/553-1
Building 301
IEEE 802.11a/g/(pre)n
& Directional Antenna
Ethernet/Mesh
Room 317/318-1
Building 138
DTN App
MM-DTN4
DTN App
DTN App
(Dst)
Option: kiosk ??
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Network Configuration Example
Dynamic Switch
38 U
RACK
KVM-1080K
2u RACK Intel Server
1U
3U
3U
DTN 3N1
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DTN 3N2
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DTN 3N3
U
DTN 3N4
3U
3U
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eth0
eth1
eth2
eth3
eth4
eth5
DTN N0
Dynamic
Switch
Connectivity Control
(Based on Scenario Files)
3G/WiBro/WLAN
Preliminary Experiments
DTN2
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DTNRG’s DTN reference implementation
Preliminary Experiments
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Various Links in Internet : Performance Evaluation on DTN2
• Multi-hop on all Wired Links
• Multi-hop on Wired Links and WiBro Link
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Wireless Link with Antennas : Performance Evaluation
• Default Omni-Antenna
• Small Directional Antenna
• (Grid) Directional Antenna
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Preliminary Experiments
Experimental Results : Various Links in Internet
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Preliminary Experiments
Wireless Link with Antennas
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Type
Gain
Frequency Range
Angle
Default OmniAntenna
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2.4 ~ 2.5 GHz
4.9 ~ 5.85 GHz
Omnidirectional
Small
Directional
Antenna
4/7 dBi
2.4 ~ 2.5 GHz
4.9 ~ 5.85 GHz
40º / 20º
(Grid)
Directional
Antenna
24dBi
5.725 ~ 5.850MHz
12º
Preliminary Experiments
Experimental Results : Wireless Link with Antennas
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Q&A
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