SSLab (Smart Space Laboratory) Project

Overview of Research
at UNL-TDU
October 16, 2003
Yoshito Tobe
Ubiquitous Networking Laboratory
Tokyo Denki University
Goal
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To establish the most suitable networking
technology for ubiquitous computing
To establish a unified view and discipline
of networking (particles, devices, people,
society etc.)
Core: NETWORK-ING
History
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Apr. 1, 2002. Bootstrapping
Dec. 2002 First students. Welcome!
Dec. 20, 2003. First Event: Visiting SONY CSL
Feb. 25, 2003. Visiting Todai-STONE
Mar. 17, 2003. Visiting Tokuda-lab
Apr. 1, 2003. One-year anniversary
Apr. 26, 2003. Sight-seeing with Al Krohn
May 31, 2003. Joint workshop with Todai, Keio, UEC
Aug. 4, 2003. Visiting Taki-lab, TDU
Aug. 25- Sep. 5, 2003. ACM SIGCOMM etc.
Sep. 26, 3003. Visiting TRL. IBM
[Planned] Nov. 4-9 Los Angeles Tour
Members
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Faculty members
２
Bachelor's students 3
Joint Researchers
4
Total 5 (9 in a wider sense)
Faculty members
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Yoshito Tobe (Sensor Maps)
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Hiroki Saito (HTTP/TCP Analysis)
へへ
のの
も
へ
Bachelor's Students
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Kazunori Makimura (Net Mgt
for Sensor Networks)
Ken'ichiro Kanehana
(Computing Resource Mgt.
considering Physical Env.)
Yasufumi Yamauchi (Service
Cooperation Using Multi-hop
Wireless Networks)
Joint Researchers (1)
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Koichi Katayama (Sasaki Lab)
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Intrusion Detection
Niwat Thepvilojanapong (Univ. of Tokyo)
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Robust and Secure Multicast ?
Joint Researchers (2)
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Hiroto (Keio Tokuda Lab.)
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Group Management of Wireless
Nodes
Makoto Takizawa
(Keio Tokuda Lab.)
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Member of RT project
Research Topics
Network Management for
Sensor Networks
 Public-Private Association
 Human-Assisted Ad hoc
Networks
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Network Management for
Distributed Sensors
1
Problems on Sensor-Network
Management
Sensors
1. Specifying nodes is difficult.
Sensors
Sensors
2. Performance such as delay is
unpredictable because
network is self-configured.
3. When failures occur,
identification of the failed
nodes is difficult.
4. Replacing batteries is
required before they run out.
"Which sensor ?"
Why is conventional network
management not sufficient ?
Simple Network Management Protocol (SNMP)
Manager
Agents
Sensor-specific failures are
not handled.
Physical connections are not
utilized.
3
SNAC Objectives
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Notification of Sensor-Specific Failures
Utilization of Physical Views
Identification of Constructed Topology
Statistical Management
4
Early
Notification
It is desirable to replace the battery of the sensor node
before it is depleted . Each node is equipped with battery, and
NMN(Network-Management Node) is warned when the amount of the battery
at a node falls below a certain threshold.
Node
Alive Node
Weakened Node
Depleted Node
remaining amount of
battery
above threshold
below threshold
none
An event is transmitted to NMN to notify that a node becomes
weakened. In some case, nodes surrounding a weakened node
send events to NMN.
5
Geographical
Area-cast : specified in some Management
range in geographical area.
Healthiness of an area is obtained using area-cast.
0
1
0
1
Location addr
… (1, 11)
(1, 01) (1, 11)
Y1
1
0
1
… (1, 111)
(1, 00) (1, 10)
0
(0, 1) (1, 1)
(0, 0) (1, 0)
Area-cast is independent of the underlying
routing protocol. However, if the routing
protocol supports geographical information,
the area-cast utilizes the information.
Alive Node
Weakened Node
Depleted Node
6
Performance Management
Sensor network is self-configured. Therefore, a route that is
undesirable in terms of delay could be created. To diagnose
such performance, NMN can identify a route between nodes.
NMN can indicate to reconfigure a route
depending on the reported performance.
×
?
A2
A4
A3
A1
Route is recorded.
?
×
NMN
7
Nodes can be equipped
with indicators such as LEDs.
Visual
Enhancement
Network management can be enhanced with the aid of such
indicators.
Commands: show-route-to-node
show-congested-nodes
<green>LEDs blinks.
The route from NMN
to a target node is indicated
with LEDs.
Weakened Node
<Red>LEDs blinks
Alive Node
Example: find weakened nodes
8
SNAC Prototype
20 MICA Motes
Implementation built on TinyOS
Commands: (1) Show-route-to-node
(2) Light-all-alive-nodes
Event Notification
weakened node
9
SAPEA: Secure Management of
Public-Private-Device
Association
Background
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Personal Computing Devices are
equipped with short-distance radio
functionality.
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Short-distance radio technology
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IrDA
IEEE802.11
Bluetooth
The increase of Hot Spot that can use a
public computer equipment is forecast.
Problem when public equipment is
used
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Secret information protect when equipment is used
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When communicating with the equipment is not
information stolen?
Does the secret information remain in the use equipment,
and do not it leak?
Is not information transmitted to the equipment not
intended when there are two or more equipment?
Are not you peeped at from the outsider?
SAPEA: Secure Ad-hoc Personalization Alliance
The access control using physical space information is
done between a public equipment and personal device.
SAPEA:
Secure Ad-hoc Personalization
Alliance
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Want to use the equipment secure in
not only on the network but also the
real world.
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Neither information nor signs remain in the
equipment after used.
Use limitation only within the district zone.
The secret information protect from
outsider whom does not want to be known.
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Grouping
Approach
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Secure use of public equipment by
limitation of using authority by distance
from equipment, and grouping.
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Distance judgment by radio devices such as
RFID and Bluetooth.
Grouping and communication by Bluetooth.
Authentication and encryption
communication by SSL.
Level of Accessible Zone (AZ) is divide.
Related
Works
The Resurrecting Duckling [1] Ad-hoc Filesystem [2]
Association
Personal Device
Computer equipment
Personal Device
Personal Device
Personal Device
Trust for Ubiquitous, Transparent Collaboration [3]
Phone Number
Phone Number
+
+
Recommendation’
Recommendation
Personal Device
Personal Device
Personal Device
SAPEA: System Architecture
Personal Device
Access Station
Device #1
User Interface
Association
Manager
SSL
Wireless Device
Device
Manager
Location
Detector
Area
Manager
Association
Manager
SSL
Wireless Device
Device #2
Device #3
AZ2
AZ1
Only the user
Can be detected and
inquired
Can be used
User and Associate
Can be detected and
inquired
Can be used
User, Associate and
Outsider
Can be detected and
inquired
Not can be used
AZ
Group
SAPEA：Basic action
Distance
judgment
Outside of AZ
Cannot use
Group
judgment
Inside of AZ2
Other groups
are detected
State inquiry
Only the
same group
Notifies all
Use state
Others are using
No others
Notifies
the user
Distance
judgment
Inside of AZ1
Demand
Use or Stop
Use
Can be used
Do not use
Stop
Distance judgment
Accessible Zone
AZ2: AS is
detectable
AZ1: AS
can be used
Access
Station
Grouping
AZ1
A
A
A
＋
101 110 101
010 001
－
A
！？
Access
Station
A
Access
Station
Z
B
A
A
Implementation
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Implement environment
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Access Station
 IBM Think Pad X30
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Red Hat Linux kernel-2.4.18
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bluez-kernel-2.3
OpenSSL 0.97b
Personal Device
 SHARP Zaurus SL-C700
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socket Bluetooth Connection Kit
socket Bluetooth Connection Kit
bluez-kernel-2.3
RFID
Printer
Concluding Remarks:
Networking Technologies are
evolving.

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