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Personal Server Model for Real-Space Networking Shirou WAKAYAMA [email protected] KEIO...
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Transcript of Personal Server Model for Real-Space Networking Shirou WAKAYAMA [email protected] KEIO...
![Page 1: Personal Server Model for Real-Space Networking Shirou WAKAYAMA shirou@sfc.keio.ac.jp KEIO University Japan.](https://reader031.fdocuments.us/reader031/viewer/2022020117/56649f065503460f94c1c603/html5/thumbnails/1.jpg)
Personal Server Model for Real-Space Networking
Shirou WAKAYAMA [email protected]
KEIO University Japan.
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Motivation
Attain Computing Environment using information in Real-Space Active Bat (Location-aware system using RF) GUIDE(Location-aware system using Wireless LAN) Oxygen(Location-sensing and using embedded
computers around the user)
Can not utilize various sensors in each system → Limited system availability and sensor
variationWe want to use various sensors in more Wide-
area
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Sample Applications
Autonomous information obtainment current location name of the person standing before the
user
Autonomous health-care support Call ambulance automatically, when
user’s physical condition change suddenly
Autonomous diary generation Log user’s daily activity automatically
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Assumed Environment
Pervasive/Ubiquitous Computing environment Users can be unaware of computers and devices Surrounding environment should care Centralization to Distribution!
Users move in wide-area Outside of lab, campus, town, everywhere
Various public sensors are setup everywhere Sensors differ depending on places Sensors nearby user will sense and inform The Internet is used to connect sensors each other
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Problem statement
Sensor information Management Modelis required
No common interfaces between each research/sensors Each research has own Sensor information
managers and models No work has done to provide
interoperability
No model to make use of various sensors while moving anywhere No overarching model
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Model Requirements
Sensor information be obtained anywhere Location Independent
Various sensor-devices be utilized Sensor-type Independent
Information be shared between people requested Only authorized people could request
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Existing model consideration
1. Aggregate/Manage all sensor information to one Central Server
Less scalability
2. Manage sensor information by servers corresponding to each sensor
As users move, surrounding sensors will change accordingly
Other users may not know where to request sensor information of specific user
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Personal Server Model(1/2)Manage Sensor information by servers corresponding to each user Manager can be set anywhere on the
Internet Manager can aggregate/manage
information from various sensors bound to each user
Other users can request sensor information by user specifiedLocation/Sensor-type Independency
in Pervasive Computing environment provided
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Personal Server Model(2/2)
B
Real-Space
Virtual-Space Personal Server= Sensor information manager
Globally Unique ID‘GUID’
A
A B C
C
MiddleSensor Layer
Sensors
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Experimentation
Experimentation 2002 Sep. , with 274 people , 4days 3night In the WIDE Project meeting
Sensor information Location-information from RF-ID and IP address Temperature information of electric hot-water
pot
Information service via Web interface Locate a person List people in a room specified Temperature information of pot
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PSPS
System overview
HTTPD PS
A
B
PS = Personal Server
OtherApplication
HTTP
SQL
RF-ID IP AddressPot
Users
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Location Sensing by RF-ID
RF-tag Sensor
Send Sensor Information to Personal Server of GUID ownerTo Personal
Server
Antenna
Ethernet
RS-232C
AntennaCable
Sensor device(1/3)
RFBase Stations
All User had RF-tag, that
Send GUID through RF.
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RF Base Station
Coverage
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Sensing by IP Address
IP address for location sensing IPv6 segment(prefix) differ per room DB has binding of prefix and room
name
Location information of Note PC per roomcan be provided
Sensor device(2/3)
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Pot (Temperature Information)
Micro Node
Temperature Sensor
Sensor Device(3/3)
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Locating a personService(1/2)
Locate your friend
Find out from GUID
Find out from NameFind out from
Organization
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Listing people in a room specified
Click the room,
List people
Service(2/2)
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Sensed Movement
BOF1BOF2BOF3
LOBBY1LOBBY2LOBBY3LOBBY4
PLENARY1PLENARY2
NOC
Actual Movement
Sensed Movement
0:00 12:00 24:00
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Location Informationfrom RF-ID and IP addr.
BOF1BOF2BOF3
LOBBY1LOBBY2LOBBY3LOBBY4
PLENARY1PLENARY2
NOC
0:00 12:00 24:00
IP addrRFID
DivideOne large room
to Two
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Future Work
Test scalability of Personal Server Model Not evaluated about Scalability with large
number of Personal Servers and users Not evaluated about Scalability of
mechanism that resolves IP address of Personal Server from GUID
Privacy Protection Secure communication between Sensor
and Personal Server Secure user authentication
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ConclusionPersonal Server Model Personal Server manage sensor information per user
Personal Server Model realizes Location independency Sensor-type independency Pervasive Computing environment Sharing information between people
Experimentation Multiple sensor devices used for information
acquisition Web interface used
Personal Server Model can apply to the everyday use